matrixperspectivefovlh.c

来自「Simple Cube plotting using frame buffers」· C语言 代码 · 共 21 行

#include <math.h>
#include "matrixPerspectiveFovLH.h"


inline void matrixPerspectiveFovLH(vector float *out, float fovy,
							float Aspect, float zn, float zf){
								
float yScale = 1.0f / tanf(fovy/2.0f);
float xScale = (1.0f/Aspect) * yScale;
float arg33 = zf / (zf - zn);
float arg34 = (-zn*zf) / (zf-zn);

out[0] = (vector float) { xScale, 0.0f, 0.0f, 0.0f };
out[1] = (vector float) { 0.0f, yScale, 0.0f, 0.0f };
out[2] = (vector float) { 0.0f, 0.0f, arg33, 1.0f };
out[3] = (vector float) { 0.0f, 0.0f, arg34, 0.0f };


}