public void onSurfaceCreated(GL10 gl, EGLConfig config) {
// 设置屏幕背景色RGBA
GLES20.glClearColor(0.9f, 0.9f, 0.9f, 1.0f);
// 启用深度测试
GLES20.glEnable(GLES20.GL_DEPTH_TEST);
// 设置为打开背面剪裁
GLES20.glEnable(GLES20.GL_CULL_FACE);
// 初始化变换矩阵
MatrixState.setInitStack();
float[] colorValue = {1, 0, 0, 1}; // 创建颜色数组
ball = new Ball(MySurfaceView.this, Constant.BALL_R, colorValue); // 创建球对象
colorValue = new float[] {1, 1, 0, 1};
stick =
new Stick(
MySurfaceView.this,
Constant.LENGTH,
Constant.R,
Constant.ANGLE_SPAN,
colorValue); // 创建圆管对象
double[] initPoint = Utils.getFirstPoint(Constant.LENGTH); // 得到第一个五边形左下点的坐标
double[] initVector = {1, 0, 0, 1}; // 初始化方向向量
double[] zPivot = {0, 0, 1, 1}; // 以z轴为旋转轴
int[] vertices = {0, 1, 2, 3, 4}; // 球的索引
int[] borders = {0, 1, 2, 3, 4}; // 圆管的索引
first =
new RegularPolygon(
MySurfaceView.this,
5,
72,
Constant.LENGTH,
initPoint,
initVector,
zPivot,
vertices,
borders); // 1
vertices = new int[] {2, 3, 4}; // 球的索引
borders = new int[] {1, 2, 3, 4}; // 圆管的索引
RegularPolygon rp2 = first.buildChild(6, -60, 1, vertices, borders); // 2
vertices = new int[] {2, 3, 4, 5};
borders = new int[] {1, 2, 3, 4, 5};
RegularPolygon rp4 = rp2.buildChild(6, 60, 3, vertices, borders); // 4
vertices = new int[] {};
borders = new int[] {1, 5};
rp4.buildChild(6, -60, 2, vertices, borders); // 5
vertices = new int[] {2};
borders = new int[] {1, 2};
RegularPolygon rp6 = rp4.buildChild(5, -72, 3, vertices, borders); // 6
vertices = new int[] {3, 4, 5};
borders = new int[] {2, 3, 4, 5};
rp6.buildChild(6, 60, 2, vertices, borders); // 7
}
public void onDrawFrame(GL10 gl) {
// 清除深度缓冲与颜色缓冲
GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
MatrixState.pushMatrix();
MatrixState.translate(0, 0, -6f);
MatrixState.pushMatrix();
MatrixState.rotate(xAngle, 1, 0, 0);
MatrixState.rotate(yAngle, 0, 1, 0);
MatrixState.rotate(zAngle, 0, 0, 1);
for (int i = 0; i < 5; i++) { // 五部分循环
MatrixState.pushMatrix();
MatrixState.rotate(72 * i, 0, 0, 1); // 根据绘制的为第几部分，旋转72*i度
first.drawSelf(0, 0); // 绘制足球碳的五分之一部分，最后的五边形由五部分组合形成，所以不用绘制
MatrixState.popMatrix();
}
MatrixState.popMatrix();
MatrixState.popMatrix();
Utils.drawnVertices.clear();
}