homdivide.c

来自「Simple Cube plotting using frame buffers」· C语言 代码 · 共 11 行

#include <altivec.h>

void homDivide(float *out){

	float w = out[3];
	vector float tempW = vec_re((vector float) {w, w, w, w});
	vector float zeroV = (vector float) {0.0f, 0.0f, 0.0f, 0.0f};
	vector float *outV = (vector float*) out;
	outV[0] = vec_madd(outV[0], tempW, zeroV); 
}