/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.graphics;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;
import java.util.HashMap;
import java.util.Map;
import com.badlogic.gdx.Application;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.VertexAttributes.Usage;
import com.badlogic.gdx.graphics.glutils.IndexArray;
import com.badlogic.gdx.graphics.glutils.IndexBufferObject;
import com.badlogic.gdx.graphics.glutils.IndexBufferObjectSubData;
import com.badlogic.gdx.graphics.glutils.IndexData;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;
import com.badlogic.gdx.graphics.glutils.VertexArray;
import com.badlogic.gdx.graphics.glutils.VertexBufferObject;
import com.badlogic.gdx.graphics.glutils.VertexBufferObjectSubData;
import com.badlogic.gdx.graphics.glutils.VertexBufferObjectWithVAO;
import com.badlogic.gdx.graphics.glutils.VertexData;
import com.badlogic.gdx.math.Matrix3;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.collision.BoundingBox;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Disposable;
import com.badlogic.gdx.utils.GdxRuntimeException;
/** <p>
* A Mesh holds vertices composed of attributes specified by a {@link VertexAttributes} instance. The vertices are held either in
* VRAM in form of vertex buffer objects or in RAM in form of vertex arrays. The former variant is more performant and is
* preferred over vertex arrays if hardware supports it.
* </p>
*
* <p>
* Meshes are automatically managed. If the OpenGL context is lost all vertex buffer objects get invalidated and must be reloaded
* when the context is recreated. This only happens on Android when a user switches to another application or receives an incoming
* call. A managed Mesh will be reloaded automagically so you don't have to do this manually.
* </p>
*
* <p>
* A Mesh consists of vertices and optionally indices which specify which vertices define a triangle. Each vertex is composed of
* attributes such as position, normal, color or texture coordinate. Note that not all of this attributes must be given, except
* for position which is non-optional. Each attribute has an alias which is used when rendering a Mesh in OpenGL ES 2.0. The alias
* is used to bind a specific vertex attribute to a shader attribute. The shader source and the alias of the attribute must match
* exactly for this to work.
* </p>
*
* @author mzechner, Dave Clayton <contact@redskyforge.com>, Xoppa */
public class Mesh implements Disposable {
public enum VertexDataType {
VertexArray, VertexBufferObject, VertexBufferObjectSubData, VertexBufferObjectWithVAO
}
/** list of all meshes **/
static final Map<Application, Array<Mesh>> meshes = new HashMap<Application, Array<Mesh>>();
final VertexData vertices;
final IndexData indices;
boolean autoBind = true;
final boolean isVertexArray;
protected Mesh (VertexData vertices, IndexData indices, boolean isVertexArray) {
this.vertices = vertices;
this.indices = indices;
this.isVertexArray = isVertexArray;
addManagedMesh(Gdx.app, this);
}
/** Creates a new Mesh with the given attributes.
*
* @param isStatic whether this mesh is static or not. Allows for internal optimizations.
* @param maxVertices the maximum number of vertices this mesh can hold
* @param maxIndices the maximum number of indices this mesh can hold
* @param attributes the {@link VertexAttribute}s. Each vertex attribute defines one property of a vertex such as position,
* normal or texture coordinate */
public Mesh (boolean isStatic, int maxVertices, int maxIndices, VertexAttribute... attributes) {
vertices = makeVertexBuffer(isStatic, maxVertices, new VertexAttributes(attributes));
indices = new IndexBufferObject(isStatic, maxIndices);
isVertexArray = false;
addManagedMesh(Gdx.app, this);
}
/** Creates a new Mesh with the given attributes.
*
* @param isStatic whether this mesh is static or not. Allows for internal optimizations.
* @param maxVertices the maximum number of vertices this mesh can hold
* @param maxIndices the maximum number of indices this mesh can hold
* @param attributes the {@link VertexAttributes}. Each vertex attribute defines one property of a vertex such as position,
* normal or texture coordinate */
public Mesh (boolean isStatic, int maxVertices, int maxIndices, VertexAttributes attributes) {
vertices = makeVertexBuffer(isStatic, maxVertices, attributes);
indices = new IndexBufferObject(isStatic, maxIndices);
isVertexArray = false;
addManagedMesh(Gdx.app, this);
}
/** Creates a new Mesh with the given attributes. Adds extra optimizations for dynamic (frequently modified) meshes.
*
* @param staticVertices whether vertices of this mesh are static or not. Allows for internal optimizations.
* @param staticIndices whether indices of this mesh are static or not. Allows for internal optimizations.
* @param maxVertices the maximum number of vertices this mesh can hold
* @param maxIndices the maximum number of indices this mesh can hold
* @param attributes the {@link VertexAttributes}. Each vertex attribute defines one property of a vertex such as position,
* normal or texture coordinate
*
* @author Jaroslaw Wisniewski <j.wisniewski@appsisle.com> **/
public Mesh (boolean staticVertices, boolean staticIndices, int maxVertices, int maxIndices, VertexAttributes attributes) {
vertices = makeVertexBuffer(staticVertices, maxVertices, attributes);
indices = new IndexBufferObject(staticIndices, maxIndices);
isVertexArray = false;
addManagedMesh(Gdx.app, this);
}
private VertexData makeVertexBuffer (boolean isStatic, int maxVertices, VertexAttributes vertexAttributes) {
if (Gdx.gl30 != null) {
return new VertexBufferObjectWithVAO(isStatic, maxVertices, vertexAttributes);
} else {
return new VertexBufferObject(isStatic, maxVertices, vertexAttributes);
}
}
/** Creates a new Mesh with the given attributes. This is an expert method with no error checking. Use at your own risk.
*
* @param type the {@link VertexDataType} to be used, VBO or VA.
* @param isStatic whether this mesh is static or not. Allows for internal optimizations.
* @param maxVertices the maximum number of vertices this mesh can hold
* @param maxIndices the maximum number of indices this mesh can hold
* @param attributes the {@link VertexAttribute}s. Each vertex attribute defines one property of a vertex such as position,
* normal or texture coordinate */
public Mesh (VertexDataType type, boolean isStatic, int maxVertices, int maxIndices, VertexAttribute... attributes) {
this(type, isStatic, maxVertices, maxIndices, new VertexAttributes(attributes));
}
/** Creates a new Mesh with the given attributes. This is an expert method with no error checking. Use at your own risk.
*
* @param type the {@link VertexDataType} to be used, VBO or VA.
* @param isStatic whether this mesh is static or not. Allows for internal optimizations.
* @param maxVertices the maximum number of vertices this mesh can hold
* @param maxIndices the maximum number of indices this mesh can hold
* @param attributes the {@link VertexAttributes}. */
public Mesh (VertexDataType type, boolean isStatic, int maxVertices, int maxIndices, VertexAttributes attributes) {
switch (type) {
case VertexBufferObject:
vertices = new VertexBufferObject(isStatic, maxVertices, attributes);
indices = new IndexBufferObject(isStatic, maxIndices);
isVertexArray = false;
break;
case VertexBufferObjectSubData:
vertices = new VertexBufferObjectSubData(isStatic, maxVertices, attributes);
indices = new IndexBufferObjectSubData(isStatic, maxIndices);
isVertexArray = false;
break;
case VertexBufferObjectWithVAO:
vertices = new VertexBufferObjectWithVAO(isStatic, maxVertices, attributes);
indices = new IndexBufferObjectSubData(isStatic, maxIndices);
isVertexArray = false;
break;
case VertexArray:
default:
vertices = new VertexArray(maxVertices, attributes);
indices = new IndexArray(maxIndices);
isVertexArray = true;
break;
}
addManagedMesh(Gdx.app, this);
}
/** Sets the vertices of this Mesh. The attributes are assumed to be given in float format.
*
* @param vertices the vertices.
* @return the mesh for invocation chaining. */
public Mesh setVertices (float[] vertices) {
this.vertices.setVertices(vertices, 0, vertices.length);
return this;
}
/** Sets the vertices of this Mesh. The attributes are assumed to be given in float format.
*
* @param vertices the vertices.
* @param offset the offset into the vertices array
* @param count the number of floats to use
* @return the mesh for invocation chaining. */
public Mesh setVertices (float[] vertices, int offset, int count) {
this.vertices.setVertices(vertices, offset, count);
return this;
}
/** Update (a portion of) the vertices. Does not resize the backing buffer.
* @param targetOffset the offset in number of floats of the mesh part.
* @param source the vertex data to update the mesh part with */
public Mesh updateVertices (int targetOffset, float[] source) {
return updateVertices(targetOffset, source, 0, source.length);
}
/** Update (a portion of) the vertices. Does not resize the backing buffer.
* @param targetOffset the offset in number of floats of the mesh part.
* @param source the vertex data to update the mesh part with
* @param sourceOffset the offset in number of floats within the source array
* @param count the number of floats to update */
public Mesh updateVertices (int targetOffset, float[] source, int sourceOffset, int count) {
this.vertices.updateVertices(targetOffset, source, sourceOffset, count);
return this;
}
/** Copies the vertices from the Mesh to the float array. The float array must be large enough to hold all the Mesh's vertices.
* @param vertices the array to copy the vertices to */
public float[] getVertices (float[] vertices) {
return getVertices(0, -1, vertices);
}
/** Copies the the remaining vertices from the Mesh to the float array. The float array must be large enough to hold the
* remaining vertices.
* @param srcOffset the offset (in number of floats) of the vertices in the mesh to copy
* @param vertices the array to copy the vertices to */
public float[] getVertices (int srcOffset, float[] vertices) {
return getVertices(srcOffset, -1, vertices);
}
/** Copies the specified vertices from the Mesh to the float array. The float array must be large enough to hold count vertices.
* @param srcOffset the offset (in number of floats) of the vertices in the mesh to copy
* @param count the amount of floats to copy
* @param vertices the array to copy the vertices to */
public float[] getVertices (int srcOffset, int count, float[] vertices) {
return getVertices(srcOffset, count, vertices, 0);
}
/** Copies the specified vertices from the Mesh to the float array. The float array must be large enough to hold
* destOffset+count vertices.
* @param srcOffset the offset (in number of floats) of the vertices in the mesh to copy
* @param count the amount of floats to copy
* @param vertices the array to copy the vertices to
* @param destOffset the offset (in floats) in the vertices array to start copying */
public float[] getVertices (int srcOffset, int count, float[] vertices, int destOffset) {
// TODO: Perhaps this method should be vertexSize aware??
final int max = getNumVertices() * getVertexSize() / 4;
if (count == -1) {
count = max - srcOffset;
if (count > vertices.length - destOffset) count = vertices.length - destOffset;
}
if (srcOffset < 0 || count <= 0 || (srcOffset + count) > max || destOffset < 0 || destOffset >= vertices.length)
throw new IndexOutOfBoundsException();
if ((vertices.length - destOffset) < count)
throw new IllegalArgumentException("not enough room in vertices array, has " + vertices.length + " floats, needs "
+ count);
int pos = getVerticesBuffer().position();
getVerticesBuffer().position(srcOffset);
getVerticesBuffer().get(vertices, destOffset, count);
getVerticesBuffer().position(pos);
return vertices;
}
/** Sets the indices of this Mesh
*
* @param indices the indices
* @return the mesh for invocation chaining. */
public Mesh setIndices (short[] indices) {
this.indices.setIndices(indices, 0, indices.length);
return this;
}
/** Sets the indices of this Mesh.
*
* @param indices the indices
* @param offset the offset into the indices array
* @param count the number of indices to copy
* @return the mesh for invocation chaining. */
public Mesh setIndices (short[] indices, int offset, int count) {
this.indices.setIndices(indices, offset, count);
return this;
}
/** Copies the indices from the Mesh to the short array. The short array must be large enough to hold all the Mesh's indices.
* @param indices the array to copy the indices to */
public void getIndices (short[] indices) {
getIndices(indices, 0);
}
/** Copies the indices from the Mesh to the short array. The short array must be large enough to hold destOffset + all the
* Mesh's indices.
* @param indices the array to copy the indices to
* @param destOffset the offset in the indices array to start copying */
public void getIndices (short[] indices, int destOffset) {
getIndices(0, indices, destOffset);
}
/** Copies the remaining indices from the Mesh to the short array. The short array must be large enough to hold destOffset + all
* the remaining indices.
* @param srcOffset the zero-based offset of the first index to fetch
* @param indices the array to copy the indices to
* @param destOffset the offset in the indices array to start copying */
public void getIndices (int srcOffset, short[] indices, int destOffset) {
getIndices(srcOffset, -1, indices, destOffset);
}
/** Copies the indices from the Mesh to the short array. The short array must be large enough to hold destOffset + count
* indices.
* @param srcOffset the zero-based offset of the first index to fetch
* @param count the total amount of indices to copy
* @param indices the array to copy the indices to
* @param destOffset the offset in the indices array to start copying */
public void getIndices (int srcOffset, int count, short[] indices, int destOffset) {
int max = getNumIndices();
if (count < 0) count = max - srcOffset;
if (srcOffset < 0 || srcOffset >= max || srcOffset + count > max)
throw new IllegalArgumentException("Invalid range specified, offset: " + srcOffset + ", count: " + count + ", max: "
+ max);
if ((indices.length - destOffset) < count)
throw new IllegalArgumentException("not enough room in indices array, has " + indices.length + " shorts, needs " + count);
int pos = getIndicesBuffer().position();
getIndicesBuffer().position(srcOffset);
getIndicesBuffer().get(indices, destOffset, count);
getIndicesBuffer().position(pos);
}
/** @return the number of defined indices */
public int getNumIndices () {
return indices.getNumIndices();
}
/** @return the number of defined vertices */
public int getNumVertices () {
return vertices.getNumVertices();
}
/** @return the maximum number of vertices this mesh can hold */
public int getMaxVertices () {
return vertices.getNumMaxVertices();
}
/** @return the maximum number of indices this mesh can hold */
public int getMaxIndices () {
return indices.getNumMaxIndices();
}
/** @return the size of a single vertex in bytes */
public int getVertexSize () {
return vertices.getAttributes().vertexSize;
}
/** Sets whether to bind the underlying {@link VertexArray} or {@link VertexBufferObject} automatically on a call to one of the
* render methods. Usually you want to use autobind. Manual binding is an expert functionality. There is a driver bug on the
* MSM720xa chips that will fuck up memory if you manipulate the vertices and indices of a Mesh multiple times while it is
* bound. Keep this in mind.
*
* @param autoBind whether to autobind meshes. */
public void setAutoBind (boolean autoBind) {
this.autoBind = autoBind;
}
/** Binds the underlying {@link VertexBufferObject} and {@link IndexBufferObject} if indices where given. Use this with OpenGL
* ES 2.0 and when auto-bind is disabled.
*
* @param shader the shader (does not bind the shader) */
public void bind (final ShaderProgram shader) {
bind(shader, null);
}
/** Binds the underlying {@link VertexBufferObject} and {@link IndexBufferObject} if indices where given. Use this with OpenGL
* ES 2.0 and when auto-bind is disabled.
*
* @param shader the shader (does not bind the shader)
* @param locations array containing the attribute locations. */
public void bind (final ShaderProgram shader, final int[] locations) {
vertices.bind(shader, locations);
if (indices.getNumIndices() > 0) indices.bind();
}
/** Unbinds the underlying {@link VertexBufferObject} and {@link IndexBufferObject} is indices were given. Use this with OpenGL
* ES 1.x and when auto-bind is disabled.
*
* @param shader the shader (does not unbind the shader) */
public void unbind (final ShaderProgram shader) {
unbind(shader, null);
}
/** Unbinds the underlying {@link VertexBufferObject} and {@link IndexBufferObject} is indices were given. Use this with OpenGL
* ES 1.x and when auto-bind is disabled.
*
* @param shader the shader (does not unbind the shader)
* @param locations array containing the attribute locations. */
public void unbind (final ShaderProgram shader, final int[] locations) {
vertices.unbind(shader, locations);
if (indices.getNumIndices() > 0) indices.unbind();
}
/** <p>
* Renders the mesh using the given primitive type. If indices are set for this mesh then getNumIndices() / #vertices per
* primitive primitives are rendered. If no indices are set then getNumVertices() / #vertices per primitive are rendered.
* </p>
*
* <p>
* This method will automatically bind each vertex attribute as specified at construction time via {@link VertexAttributes} to
* the respective shader attributes. The binding is based on the alias defined for each VertexAttribute.
* </p>
*
* <p>
* This method must only be called after the {@link ShaderProgram#begin()} method has been called!
* </p>
*
* <p>
* This method is intended for use with OpenGL ES 2.0 and will throw an IllegalStateException when OpenGL ES 1.x is used.
* </p>
*
* @param primitiveType the primitive type */
public void render (ShaderProgram shader, int primitiveType) {
render(shader, primitiveType, 0, indices.getNumMaxIndices() > 0 ? getNumIndices() : getNumVertices(), autoBind);
}
/** <p>
* Renders the mesh using the given primitive type. offset specifies the offset into either the vertex buffer or the index
* buffer depending on whether indices are defined. count specifies the number of vertices or indices to use thus count /
* #vertices per primitive primitives are rendered.
* </p>
*
* <p>
* This method will automatically bind each vertex attribute as specified at construction time via {@link VertexAttributes} to
* the respective shader attributes. The binding is based on the alias defined for each VertexAttribute.
* </p>
*
* <p>
* This method must only be called after the {@link ShaderProgram#begin()} method has been called!
* </p>
*
* <p>
* This method is intended for use with OpenGL ES 2.0 and will throw an IllegalStateException when OpenGL ES 1.x is used.
* </p>
*
* @param shader the shader to be used
* @param primitiveType the primitive type
* @param offset the offset into the vertex or index buffer
* @param count number of vertices or indices to use */
public void render (ShaderProgram shader, int primitiveType, int offset, int count) {
render(shader, primitiveType, offset, count, autoBind);
}
/** <p>
* Renders the mesh using the given primitive type. offset specifies the offset into either the vertex buffer or the index
* buffer depending on whether indices are defined. count specifies the number of vertices or indices to use thus count /
* #vertices per primitive primitives are rendered.
* </p>
*
* <p>
* This method will automatically bind each vertex attribute as specified at construction time via {@link VertexAttributes} to
* the respective shader attributes. The binding is based on the alias defined for each VertexAttribute.
* </p>
*
* <p>
* This method must only be called after the {@link ShaderProgram#begin()} method has been called!
* </p>
*
* <p>
* This method is intended for use with OpenGL ES 2.0 and will throw an IllegalStateException when OpenGL ES 1.x is used.
* </p>
*
* @param shader the shader to be used
* @param primitiveType the primitive type
* @param offset the offset into the vertex or index buffer
* @param count number of vertices or indices to use
* @param autoBind overrides the autoBind member of this Mesh */
public void render (ShaderProgram shader, int primitiveType, int offset, int count, boolean autoBind) {
if (count == 0) return;
if (autoBind) bind(shader);
if (isVertexArray) {
if (indices.getNumIndices() > 0) {
ShortBuffer buffer = indices.getBuffer();
int oldPosition = buffer.position();
int oldLimit = buffer.limit();
buffer.position(offset);
buffer.limit(offset + count);
Gdx.gl20.glDrawElements(primitiveType, count, GL20.GL_UNSIGNED_SHORT, buffer);
buffer.position(oldPosition);
buffer.limit(oldLimit);
} else {
Gdx.gl20.glDrawArrays(primitiveType, offset, count);
}
} else {
if (indices.getNumIndices() > 0)
Gdx.gl20.glDrawElements(primitiveType, count, GL20.GL_UNSIGNED_SHORT, offset * 2);
else
Gdx.gl20.glDrawArrays(primitiveType, offset, count);
}
if (autoBind) unbind(shader);
}
/** Frees all resources associated with this Mesh */
public void dispose () {
if (meshes.get(Gdx.app) != null) meshes.get(Gdx.app).removeValue(this, true);
vertices.dispose();
indices.dispose();
}
/** Returns the first {@link VertexAttribute} having the given {@link Usage}.
*
* @param usage the Usage.
* @return the VertexAttribute or null if no attribute with that usage was found. */
public VertexAttribute getVertexAttribute (int usage) {
VertexAttributes attributes = vertices.getAttributes();
int len = attributes.size();
for (int i = 0; i < len; i++)
if (attributes.get(i).usage == usage) return attributes.get(i);
return null;
}
/** @return the vertex attributes of this Mesh */
public VertexAttributes getVertexAttributes () {
return vertices.getAttributes();
}
/** @return the backing FloatBuffer holding the vertices. Does not have to be a direct buffer on Android! */
public FloatBuffer getVerticesBuffer () {
return vertices.getBuffer();
}
/** Calculates the {@link BoundingBox} of the vertices contained in this mesh. In case no vertices are defined yet a
* {@link GdxRuntimeException} is thrown. This method creates a new BoundingBox instance.
*
* @return the bounding box. */
public BoundingBox calculateBoundingBox () {
BoundingBox bbox = new BoundingBox();
calculateBoundingBox(bbox);
return bbox;
}
/** Calculates the {@link BoundingBox} of the vertices contained in this mesh. In case no vertices are defined yet a
* {@link GdxRuntimeException} is thrown.
*
* @param bbox the bounding box to store the result in. */
public void calculateBoundingBox (BoundingBox bbox) {
final int numVertices = getNumVertices();
if (numVertices == 0) throw new GdxRuntimeException("No vertices defined");
final FloatBuffer verts = vertices.getBuffer();
bbox.inf();
final VertexAttribute posAttrib = getVertexAttribute(Usage.Position);
final int offset = posAttrib.offset / 4;
final int vertexSize = vertices.getAttributes().vertexSize / 4;
int idx = offset;
switch (posAttrib.numComponents) {
case 1:
for (int i = 0; i < numVertices; i++) {
bbox.ext(verts.get(idx), 0, 0);
idx += vertexSize;
}
break;
case 2:
for (int i = 0; i < numVertices; i++) {
bbox.ext(verts.get(idx), verts.get(idx + 1), 0);
idx += vertexSize;
}
break;
case 3:
for (int i = 0; i < numVertices; i++) {
bbox.ext(verts.get(idx), verts.get(idx + 1), verts.get(idx + 2));
idx += vertexSize;
}
break;
}
}
/** Calculate the {@link BoundingBox} of the specified part.
* @param out the bounding box to store the result in.
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the value specified by out. */
public BoundingBox calculateBoundingBox (final BoundingBox out, int offset, int count) {
return extendBoundingBox(out.inf(), offset, count);
}
/** Calculate the {@link BoundingBox} of the specified part.
* @param out the bounding box to store the result in.
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the value specified by out. */
public BoundingBox calculateBoundingBox (final BoundingBox out, int offset, int count, final Matrix4 transform) {
return extendBoundingBox(out.inf(), offset, count, transform);
}
/** Extends the specified {@link BoundingBox} with the specified part.
* @param out the bounding box to store the result in.
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the value specified by out. */
public BoundingBox extendBoundingBox (final BoundingBox out, int offset, int count) {
return extendBoundingBox(out, offset, count, null);
}
private final Vector3 tmpV = new Vector3();
/** Extends the specified {@link BoundingBox} with the specified part.
* @param out the bounding box to store the result in.
* @param offset the start of the part.
* @param count the size of the part.
* @return the value specified by out. */
public BoundingBox extendBoundingBox (final BoundingBox out, int offset, int count, final Matrix4 transform) {
final int numIndices = getNumIndices();
final int numVertices = getNumVertices();
final int max = numIndices == 0 ? numVertices : numIndices;
if (offset < 0 || count < 1 || offset + count > max)
throw new GdxRuntimeException("Invalid part specified ( offset=" + offset + ", count=" + count + ", max=" + max + " )");
final FloatBuffer verts = vertices.getBuffer();
final ShortBuffer index = indices.getBuffer();
final VertexAttribute posAttrib = getVertexAttribute(Usage.Position);
final int posoff = posAttrib.offset / 4;
final int vertexSize = vertices.getAttributes().vertexSize / 4;
final int end = offset + count;
switch (posAttrib.numComponents) {
case 1:
if (numIndices > 0) {
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), 0, 0);
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
} else {
for (int i = offset; i < end; i++) {
final int idx = i * vertexSize + posoff;
tmpV.set(verts.get(idx), 0, 0);
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
}
break;
case 2:
if (numIndices > 0) {
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), 0);
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
} else {
for (int i = offset; i < end; i++) {
final int idx = i * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), 0);
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
}
break;
case 3:
if (numIndices > 0) {
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), verts.get(idx + 2));
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
} else {
for (int i = offset; i < end; i++) {
final int idx = i * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), verts.get(idx + 2));
if (transform != null) tmpV.mul(transform);
out.ext(tmpV);
}
}
break;
}
return out;
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param centerX The X coordinate of the center of the bounding sphere
* @param centerY The Y coordinate of the center of the bounding sphere
* @param centerZ The Z coordinate of the center of the bounding sphere
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the squared radius of the bounding sphere. */
public float calculateRadiusSquared (final float centerX, final float centerY, final float centerZ, int offset, int count,
final Matrix4 transform) {
int numIndices = getNumIndices();
if (offset < 0 || count < 1 || offset + count > numIndices) throw new GdxRuntimeException("Not enough indices");
final FloatBuffer verts = vertices.getBuffer();
final ShortBuffer index = indices.getBuffer();
final VertexAttribute posAttrib = getVertexAttribute(Usage.Position);
final int posoff = posAttrib.offset / 4;
final int vertexSize = vertices.getAttributes().vertexSize / 4;
final int end = offset + count;
float result = 0;
switch (posAttrib.numComponents) {
case 1:
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), 0, 0);
if (transform != null) tmpV.mul(transform);
final float r = tmpV.sub(centerX, centerY, centerZ).len2();
if (r > result) result = r;
}
break;
case 2:
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), 0);
if (transform != null) tmpV.mul(transform);
final float r = tmpV.sub(centerX, centerY, centerZ).len2();
if (r > result) result = r;
}
break;
case 3:
for (int i = offset; i < end; i++) {
final int idx = index.get(i) * vertexSize + posoff;
tmpV.set(verts.get(idx), verts.get(idx + 1), verts.get(idx + 2));
if (transform != null) tmpV.mul(transform);
final float r = tmpV.sub(centerX, centerY, centerZ).len2();
if (r > result) result = r;
}
break;
}
return result;
}
/** Calculates the radius of the bounding sphere around the specified center for the specified part.
* @param centerX The X coordinate of the center of the bounding sphere
* @param centerY The Y coordinate of the center of the bounding sphere
* @param centerZ The Z coordinate of the center of the bounding sphere
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the radius of the bounding sphere. */
public float calculateRadius (final float centerX, final float centerY, final float centerZ, int offset, int count,
final Matrix4 transform) {
return (float)Math.sqrt(calculateRadiusSquared(centerX, centerY, centerZ, offset, count, transform));
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param center The center of the bounding sphere
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the squared radius of the bounding sphere. */
public float calculateRadius (final Vector3 center, int offset, int count, final Matrix4 transform) {
return calculateRadius(center.x, center.y, center.z, offset, count, transform);
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param centerX The X coordinate of the center of the bounding sphere
* @param centerY The Y coordinate of the center of the bounding sphere
* @param centerZ The Z coordinate of the center of the bounding sphere
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the squared radius of the bounding sphere. */
public float calculateRadius (final float centerX, final float centerY, final float centerZ, int offset, int count) {
return calculateRadius(centerX, centerY, centerZ, offset, count, null);
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param center The center of the bounding sphere
* @param offset the start index of the part.
* @param count the amount of indices the part contains.
* @return the squared radius of the bounding sphere. */
public float calculateRadius (final Vector3 center, int offset, int count) {
return calculateRadius(center.x, center.y, center.z, offset, count, null);
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param centerX The X coordinate of the center of the bounding sphere
* @param centerY The Y coordinate of the center of the bounding sphere
* @param centerZ The Z coordinate of the center of the bounding sphere
* @return the squared radius of the bounding sphere. */
public float calculateRadius (final float centerX, final float centerY, final float centerZ) {
return calculateRadius(centerX, centerY, centerZ, 0, getNumIndices(), null);
}
/** Calculates the squared radius of the bounding sphere around the specified center for the specified part.
* @param center The center of the bounding sphere
* @return the squared radius of the bounding sphere. */
public float calculateRadius (final Vector3 center) {
return calculateRadius(center.x, center.y, center.z, 0, getNumIndices(), null);
}
/** @return the backing shortbuffer holding the indices. Does not have to be a direct buffer on Android! */
public ShortBuffer getIndicesBuffer () {
return indices.getBuffer();
}
private static void addManagedMesh (Application app, Mesh mesh) {
Array<Mesh> managedResources = meshes.get(app);
if (managedResources == null) managedResources = new Array<Mesh>();
managedResources.add(mesh);
meshes.put(app, managedResources);
}
/** Invalidates all meshes so the next time they are rendered new VBO handles are generated.
* @param app */
public static void invalidateAllMeshes (Application app) {
Array<Mesh> meshesArray = meshes.get(app);
if (meshesArray == null) return;
for (int i = 0; i < meshesArray.size; i++) {
meshesArray.get(i).vertices.invalidate();
meshesArray.get(i).indices.invalidate();
}
}
/** Will clear the managed mesh cache. I wouldn't use this if i was you :) */
public static void clearAllMeshes (Application app) {
meshes.remove(app);
}
public static String getManagedStatus () {
StringBuilder builder = new StringBuilder();
int i = 0;
builder.append("Managed meshes/app: { ");
for (Application app : meshes.keySet()) {
builder.append(meshes.get(app).size);
builder.append(" ");
}
builder.append("}");
return builder.toString();
}
/** Method to scale the positions in the mesh. Normals will be kept as is. This is a potentially slow operation, use with care.
* It will also create a temporary float[] which will be garbage collected.
*
* @param scaleX scale on x
* @param scaleY scale on y
* @param scaleZ scale on z */
public void scale (float scaleX, float scaleY, float scaleZ) {
final VertexAttribute posAttr = getVertexAttribute(Usage.Position);
final int offset = posAttr.offset / 4;
final int numComponents = posAttr.numComponents;
final int numVertices = getNumVertices();
final int vertexSize = getVertexSize() / 4;
final float[] vertices = new float[numVertices * vertexSize];
getVertices(vertices);
int idx = offset;
switch (numComponents) {
case 1:
for (int i = 0; i < numVertices; i++) {
vertices[idx] *= scaleX;
idx += vertexSize;
}
break;
case 2:
for (int i = 0; i < numVertices; i++) {
vertices[idx] *= scaleX;
vertices[idx + 1] *= scaleY;
idx += vertexSize;
}
break;
case 3:
for (int i = 0; i < numVertices; i++) {
vertices[idx] *= scaleX;
vertices[idx + 1] *= scaleY;
vertices[idx + 2] *= scaleZ;
idx += vertexSize;
}
break;
}
setVertices(vertices);
}
/** Method to transform the positions in the mesh. Normals will be kept as is. This is a potentially slow operation, use with
* care. It will also create a temporary float[] which will be garbage collected.
*
* @param matrix the transformation matrix */
public void transform (final Matrix4 matrix) {
transform(matrix, 0, getNumVertices());
}
// TODO: Protected for now, because transforming a portion works but still copies all vertices
public void transform (final Matrix4 matrix, final int start, final int count) {
final VertexAttribute posAttr = getVertexAttribute(Usage.Position);
final int posOffset = posAttr.offset / 4;
final int stride = getVertexSize() / 4;
final int numComponents = posAttr.numComponents;
final int numVertices = getNumVertices();
final float[] vertices = new float[count * stride];
getVertices(start * stride, count * stride, vertices);
// getVertices(0, vertices.length, vertices);
transform(matrix, vertices, stride, posOffset, numComponents, 0, count);
// setVertices(vertices, 0, vertices.length);
updateVertices(start * stride, vertices);
}
/** Method to transform the positions in the float array. Normals will be kept as is. This is a potentially slow operation, use
* with care.
* @param matrix the transformation matrix
* @param vertices the float array
* @param vertexSize the number of floats in each vertex
* @param offset the offset within a vertex to the position
* @param dimensions the size of the position
* @param start the vertex to start with
* @param count the amount of vertices to transform */
public static void transform (final Matrix4 matrix, final float[] vertices, int vertexSize, int offset, int dimensions,
int start, int count) {
if (offset < 0 || dimensions < 1 || (offset + dimensions) > vertexSize) throw new IndexOutOfBoundsException();
if (start < 0 || count < 1 || ((start + count) * vertexSize) > vertices.length)
throw new IndexOutOfBoundsException("start = " + start + ", count = " + count + ", vertexSize = " + vertexSize
+ ", length = " + vertices.length);
final Vector3 tmp = new Vector3();
int idx = offset + (start * vertexSize);
switch (dimensions) {
case 1:
for (int i = 0; i < count; i++) {
tmp.set(vertices[idx], 0, 0).mul(matrix);
vertices[idx] = tmp.x;
idx += vertexSize;
}
break;
case 2:
for (int i = 0; i < count; i++) {
tmp.set(vertices[idx], vertices[idx + 1], 0).mul(matrix);
vertices[idx] = tmp.x;
vertices[idx + 1] = tmp.y;
idx += vertexSize;
}
break;
case 3:
for (int i = 0; i < count; i++) {
tmp.set(vertices[idx], vertices[idx + 1], vertices[idx + 2]).mul(matrix);
vertices[idx] = tmp.x;
vertices[idx + 1] = tmp.y;
vertices[idx + 2] = tmp.z;
idx += vertexSize;
}
break;
}
}
/** Method to transform the texture coordinates in the mesh. This is a potentially slow operation, use with care. It will also
* create a temporary float[] which will be garbage collected.
*
* @param matrix the transformation matrix */
public void transformUV (final Matrix3 matrix) {
transformUV(matrix, 0, getNumVertices());
}
// TODO: Protected for now, because transforming a portion works but still copies all vertices
protected void transformUV (final Matrix3 matrix, final int start, final int count) {
final VertexAttribute posAttr = getVertexAttribute(Usage.TextureCoordinates);
final int offset = posAttr.offset / 4;
final int vertexSize = getVertexSize() / 4;
final int numVertices = getNumVertices();
final float[] vertices = new float[numVertices * vertexSize];
// TODO: getVertices(vertices, start * vertexSize, count * vertexSize);
getVertices(0, vertices.length, vertices);
transformUV(matrix, vertices, vertexSize, offset, start, count);
setVertices(vertices, 0, vertices.length);
// TODO: setVertices(start * vertexSize, vertices, 0, vertices.length);
}
/** Method to transform the texture coordinates (UV) in the float array. This is a potentially slow operation, use with care.
* @param matrix the transformation matrix
* @param vertices the float array
* @param vertexSize the number of floats in each vertex
* @param offset the offset within a vertex to the texture location
* @param start the vertex to start with
* @param count the amount of vertices to transform */
public static void transformUV (final Matrix3 matrix, final float[] vertices, int vertexSize, int offset, int start, int count) {
if (start < 0 || count < 1 || ((start + count) * vertexSize) > vertices.length)
throw new IndexOutOfBoundsException("start = " + start + ", count = " + count + ", vertexSize = " + vertexSize
+ ", length = " + vertices.length);
final Vector2 tmp = new Vector2();
int idx = offset + (start * vertexSize);
for (int i = 0; i < count; i++) {
tmp.set(vertices[idx], vertices[idx + 1]).mul(matrix);
vertices[idx] = tmp.x;
vertices[idx + 1] = tmp.y;
idx += vertexSize;
}
}
/** Copies this mesh optionally removing duplicate vertices and/or reducing the amount of attributes.
* @param isStatic whether the new mesh is static or not. Allows for internal optimizations.
* @param removeDuplicates whether to remove duplicate vertices if possible. Only the vertices specified by usage are checked.
* @param usage which attributes (if available) to copy
* @return the copy of this mesh */
public Mesh copy (boolean isStatic, boolean removeDuplicates, final int[] usage) {
// TODO move this to a copy constructor?
// TODO duplicate the buffers without double copying the data if possible.
// TODO perhaps move this code to JNI if it turns out being too slow.
final int vertexSize = getVertexSize() / 4;
int numVertices = getNumVertices();
float[] vertices = new float[numVertices * vertexSize];
getVertices(0, vertices.length, vertices);
short[] checks = null;
VertexAttribute[] attrs = null;
int newVertexSize = 0;
if (usage != null) {
int size = 0;
int as = 0;
for (int i = 0; i < usage.length; i++)
if (getVertexAttribute(usage[i]) != null) {
size += getVertexAttribute(usage[i]).numComponents;
as++;
}
if (size > 0) {
attrs = new VertexAttribute[as];
checks = new short[size];
int idx = -1;
int ai = -1;
for (int i = 0; i < usage.length; i++) {
VertexAttribute a = getVertexAttribute(usage[i]);
if (a == null) continue;
for (int j = 0; j < a.numComponents; j++)
checks[++idx] = (short)(a.offset + j);
attrs[++ai] = a.copy();
newVertexSize += a.numComponents;
}
}
}
if (checks == null) {
checks = new short[vertexSize];
for (short i = 0; i < vertexSize; i++)
checks[i] = i;
newVertexSize = vertexSize;
}
int numIndices = getNumIndices();
short[] indices = null;
if (numIndices > 0) {
indices = new short[numIndices];
getIndices(indices);
if (removeDuplicates || newVertexSize != vertexSize) {
float[] tmp = new float[vertices.length];
int size = 0;
for (int i = 0; i < numIndices; i++) {
final int idx1 = indices[i] * vertexSize;
short newIndex = -1;
if (removeDuplicates) {
for (short j = 0; j < size && newIndex < 0; j++) {
final int idx2 = j * newVertexSize;
boolean found = true;
for (int k = 0; k < checks.length && found; k++) {
if (tmp[idx2 + k] != vertices[idx1 + checks[k]]) found = false;
}
if (found) newIndex = j;
}
}
if (newIndex > 0)
indices[i] = newIndex;
else {
final int idx = size * newVertexSize;
for (int j = 0; j < checks.length; j++)
tmp[idx + j] = vertices[idx1 + checks[j]];
indices[i] = (short)size;
size++;
}
}
vertices = tmp;
numVertices = size;
}
}
Mesh result;
if (attrs == null)
result = new Mesh(isStatic, numVertices, indices == null ? 0 : indices.length, getVertexAttributes());
else
result = new Mesh(isStatic, numVertices, indices == null ? 0 : indices.length, attrs);
result.setVertices(vertices, 0, numVertices * newVertexSize);
result.setIndices(indices);
return result;
}
/** Copies this mesh.
* @param isStatic whether the new mesh is static or not. Allows for internal optimizations.
* @return the copy of this mesh */
public Mesh copy (boolean isStatic) {
return copy(isStatic, false, null);
}
}