/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.example.android.apis.graphics.kube;
public class Layer {
public Layer(int axis) {
// start with identity matrix for transformation
mAxis = axis;
mTransform.setIdentity();
}
public void startAnimation() {
for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.startAnimation();
}
}
}
public void endAnimation() {
for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.endAnimation();
}
}
}
public void setAngle(float angle) {
// normalize the angle
float twopi = (float)Math.PI *2f;
while (angle >= twopi) angle -= twopi;
while (angle < 0f) angle += twopi;
// mAngle = angle;
float sin = (float)Math.sin(angle);
float cos = (float)Math.cos(angle);
float[][] m = mTransform.m;
switch (mAxis) {
case kAxisX:
m[1][1] = cos;
m[1][2] = sin;
m[2][1] = -sin;
m[2][2] = cos;
m[0][0] = 1f;
m[0][1] = m[0][2] = m[1][0] = m[2][0] = 0f;
break;
case kAxisY:
m[0][0] = cos;
m[0][2] = sin;
m[2][0] = -sin;
m[2][2] = cos;
m[1][1] = 1f;
m[0][1] = m[1][0] = m[1][2] = m[2][1] = 0f;
break;
case kAxisZ:
m[0][0] = cos;
m[0][1] = sin;
m[1][0] = -sin;
m[1][1] = cos;
m[2][2] = 1f;
m[2][0] = m[2][1] = m[0][2] = m[1][2] = 0f;
break;
}
for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.animateTransform(mTransform);
}
}
}
GLShape[] mShapes = new GLShape[9];
M4 mTransform = new M4();
// float mAngle;
// which axis do we rotate around?
// 0 for X, 1 for Y, 2 for Z
int mAxis;
static public final int kAxisX = 0;
static public final int kAxisY = 1;
static public final int kAxisZ = 2;
}