C++ (Cpp) matrixFrustum Examples

Example #1

File: Matrix.cpp Project: dugu9sword/ES-Player

void matrixPerspective(float* matrix, float fieldOfView, float aspectRatio, float zNear, float zFar)
{
    float ymax, xmax;
    ymax = zNear * tanf(fieldOfView * M_PI / 360.0);
    xmax = ymax * aspectRatio;
    matrixFrustum(matrix, -xmax, xmax, -ymax, ymax, zNear, zFar);
}

Example #2

File: math_utils.cpp Project: sparupat/OpenGL-Timestamp-Profiler

// Projection matrix handling - see http://www.opengl.org/wiki/GluPerspective_code
void matrixPerspective(float result[16], float fovy_degrees, float aspect_ratio,
                       float znear, float zfar)
{
    float ymax, xmax;
    ymax = znear * tanf(fovy_degrees * PI_FLOAT / 360.0f);
    xmax = ymax * aspect_ratio;
    matrixFrustum(result, -xmax, xmax, -ymax, ymax, znear, zfar);
}