RendererManager.java

package net.zhuoweizhang.mcpelauncher.api.modpe;

import org.mozilla.javascript.*;
import org.mozilla.javascript.annotations.*;

public class RendererManager {

	private static native void nativeModelAddBox(int rendererId, String modelPart, float xOffset, float yOffset, float zOffset,
		int width, int height, int depth, float scale, int textureX, int textureY, boolean transparent,
		float textureWidth, float textureHeight);
	private static native void nativeModelClear(int rendererId, String modelPart);
	private static native boolean nativeModelPartExists(int rendererId, String modelPart);
	private static native int nativeCreateHumanoidRenderer();
	public static native void nativeModelSetRotationPoint(int rendererId, String modelPart, float x, float y, float z);

	public static void defineClasses(Scriptable scope) throws Exception {
		ScriptableObject.defineClass(scope, NativeRendererApi.class);
		/*ScriptableObject.defineClass(scope, NativeModel.class);
		ScriptableObject.defineClass(scope, NativeModelPart.class);*/
	}

	private static class NativeRendererApi extends ScriptableObject {
		public NativeRendererApi() {
		}
		@JSStaticFunction
		public static NativeRenderer get(String name) {
			try {
				int id = Integer.parseInt(name);
				return new NativeRenderer(id);
			} catch (NumberFormatException e) {
			}
			return null; //TODO: named renderers
		}
		@JSStaticFunction
		public static NativeRenderer createHumanoidRenderer() {
			int id = nativeCreateHumanoidRenderer();
			return new NativeRenderer(id);
		}
		@Override
		public String getClassName() {
			return "Renderer";
		}
	}

	public static class NativeRenderer {
		private final int rendererId;
		public NativeRenderer(int id) {
			this.rendererId = id;
		}
		public int getRenderType() {
			return rendererId;
		}
		public NativeModel getModel() {
			return new NativeModel(this.rendererId); //TODO: secondary models - e.g. armour
		}
	}
	public static class NativeModel {
		private final int rendererId;
		private NativeModel(int rendererId) {
			this.rendererId = rendererId;
		}
		public NativeModelPart getPart(String name) {
			boolean partExists = nativeModelPartExists(rendererId, name);
			if (!partExists) throw new RuntimeException("The model part " + name + " does not exist.");
			return new NativeModelPart(rendererId, name);
		}
	}

	public static class NativeModelPart {
		private int rendererId;
		private String modelPartName;
		private int textureX, textureY;
		private boolean transparent;
		private float textureWidth = -1f, textureHeight = -1f;
		private NativeModelPart(int rendererId, String modelPartName) {
			this.rendererId = rendererId;
			this.modelPartName = modelPartName;
		}

		public NativeModelPart setTextureOffset(int textureX, int textureY) {
			return this.setTextureOffset(textureX, textureY, false);
		}

		public NativeModelPart setTextureOffset(int textureX, int textureY, boolean transparent) {
			this.textureX = textureX;
			this.textureY = textureY;
			this.transparent = transparent;
			return this;
		}

		public void addBox(float xOffset, float yOffset, float zOffset, int width, int height, int depth) {
			addBox(xOffset, yOffset, zOffset, width, height, depth, 0.0f);
		}

		public void addBox(float xOffset, float yOffset, float zOffset, int width, int height, int depth, float scale) {
			nativeModelAddBox(rendererId, modelPartName, xOffset, yOffset, zOffset, 
				width, height, depth, scale,
				this.textureX, this.textureY, this.transparent,
				this.textureWidth, this.textureHeight);
		}

		public NativeModelPart clear() {
			nativeModelClear(rendererId, modelPartName);
			return this;
		}

		public NativeModelPart setTextureSize(float width, float height) {
			this.textureWidth = width;
			this.textureHeight = height;
			return this;
		}

		public NativeModelPart setRotationPoint(float x, float y, float z) {
			nativeModelSetRotationPoint(rendererId, modelPartName, x, y, z);
			return this;
		}
	}
}