直接上代码。
public static void glViewport( int x, int y, int width, int height ) { int surfaceHeight = mInfo.height; float far = mViewPortZFar; float near = mViewPortZNear; float sx = width/2.0f; float ox = sx + x; float sy = height/2.0f; float oy = sy + surfaceHeight - height - y; float A = (far - near)/2.0f; float B = (far + near)/2.0f; // compute viewport matrix float[][] f = new float[4][4]; f[0][0] = sx; f[0][1] = 0; f[0][2] = 0; f[0][3] = ox; f[1][0] = 0; f[1][1] =-sy; f[1][2] = 0; f[1][3] = oy; f[2][0] = 0; f[2][1] = 0; f[2][2] = A; f[2][3] = B; f[3][0] = 0; f[3][1] = 0; f[3][2] = 0; f[3][3] = 1; mCurrentViewPortMatrix = new M4(); mCurrentViewPortMatrix.m = f; }
public static void glDepthRangef( float zNear, float zFar ){ mViewPortZNear = zNear; mViewPortZFar = zFar; }
