138 lines
3.6 KiB
Java
138 lines
3.6 KiB
Java
package com.bn.clp;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.FloatBuffer;
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import android.opengl.GLES20;
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import com.bn.core.MatrixState;
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//可吃物体
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public class Speed extends SpeedForEat
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{
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Diamond dd;
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final float UNIT_SIZE=1.0f;
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final float width=UNIT_SIZE;
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final float height=UNIT_SIZE*2;
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public Speed(int programId)
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{
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dd=new Diamond(programId,width,height);
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}
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//总的绘制方法drawSelf
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public void drawSelf(int texId)
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{
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dd.drawSelf(texId);
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}
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//内部类——菱形
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private class Diamond
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{
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//自定义Shader程序的引用
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int mProgram;
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//总变换矩阵的引用id
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int muMVPMatrixHandle;
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//顶点属性的引用id
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int maPositionHandle;
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//顶点纹理坐标的引用id
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int maTexCoorHandle;
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//顶点坐标数据缓冲
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FloatBuffer mVertexBuffer;
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//顶点纹理坐标数据缓冲
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FloatBuffer mTexCoorBuffer;
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int vCount=0;//顶点数量
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//R为圆柱底部的半径，r为圆柱上部的半径，angle_span表示的是切分的角度
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public Diamond(int programId,float width,float height)
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{
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initVertexData(width,height);
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initShader(programId);
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}
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//初始化坐标数据的initVertexData方法
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public void initVertexData(float width,float height)
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{
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float[] vertex=new float[]
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{
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0,height,0, -width,0,-width, -width,0,width,
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0,height,0, -width,0,width, width,0,width,
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0,height,0, width,0,width, width,0,-width,
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0,height,0, width,0,-width, -width,0,-width,
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0,-height,0, -width,0,width, -width,0,-width,
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0,-height,0, width,0,width, -width,0,width,
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0,-height,0, width,0,-width, width,0,width,
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0,-height,0, -width,0, -width, width,0,-width,
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};
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vCount=24;//顶点数量
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ByteBuffer vbb=ByteBuffer.allocateDirect(vertex.length*4);
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vbb.order(ByteOrder.nativeOrder());
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mVertexBuffer=vbb.asFloatBuffer();
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mVertexBuffer.put(vertex);
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mVertexBuffer.position(0);
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float[] texcoor=new float[]
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{
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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0.5f,0, 0,1, 1,1,
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};
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ByteBuffer tbb=ByteBuffer.allocateDirect(texcoor.length*4);
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tbb.order(ByteOrder.nativeOrder());
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mTexCoorBuffer=tbb.asFloatBuffer();
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mTexCoorBuffer.put(texcoor);
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mTexCoorBuffer.position(0);
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}
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//初始化着色器程序的initShader方法
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public void initShader(int programId)
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{
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mProgram=programId;
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//获得顶点坐标数据的引用
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maPositionHandle=GLES20.glGetAttribLocation(mProgram, "aPosition");
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//顶点纹理坐标的引用id
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maTexCoorHandle=GLES20.glGetAttribLocation(mProgram, "aTexCoor");
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muMVPMatrixHandle=GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
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}
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//自定义的绘制方法
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public void drawSelf(int texId)
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{
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//使用某套指定的Shader程序
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GLES20.glUseProgram(mProgram);
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//将最终变换矩阵传入到Shader程序中
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GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);
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//传入顶点坐标数据
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GLES20.glVertexAttribPointer
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(
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maPositionHandle,
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3,
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GLES20.GL_FLOAT,
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false,
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3*4,
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mVertexBuffer
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);
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//传入纹理坐标数据
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GLES20.glVertexAttribPointer
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(
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maTexCoorHandle,
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2,
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GLES20.GL_FLOAT,
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false,
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2*4,
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mTexCoorBuffer
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);
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//允许顶点位置数据数组
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GLES20.glEnableVertexAttribArray(maPositionHandle);
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GLES20.glEnableVertexAttribArray(maTexCoorHandle);
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//绑定纹理
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GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
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GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId);
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//绘制纹理矩形
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GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount);
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}
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}
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} |