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Fix view matrix skew bug.

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Shpoike 2021-03-21 14:09:24 +00:00
parent 3f6c3a9da5
commit 29cc8a3183
1 changed files with 5 additions and 6 deletions
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11
Quake/mathlib.c
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@ -799,9 +799,8 @@ qboolean Matrix4_Invert(const float *m, float *out)
#undef SWAP_ROWS #undef SWAP_ROWS
} }
//FIXME: use these instead of all the glRotate etc calls, because why not.
void Matrix4_ViewMatrix(const vec3_t viewangles, const vec3_t vieworg, mat4_t out) void Matrix4_ViewMatrix(const vec3_t viewangles, const vec3_t vieworg, mat4_t out)
{ //directly compute an opengl view matrix. this is not the same as a model matrix (in part because the values are all negated). { //directly compute a view matrix. this is not the same as a model matrix (in part because the values are all negated).
float cp = cos(-viewangles[0] * M_PI / 180.0); float cp = cos(-viewangles[0] * M_PI / 180.0);
float sp = sin(-viewangles[0] * M_PI / 180.0); float sp = sin(-viewangles[0] * M_PI / 180.0);
float cy = cos(-viewangles[1] * M_PI / 180.0); float cy = cos(-viewangles[1] * M_PI / 180.0);
@ -809,15 +808,15 @@ void Matrix4_ViewMatrix(const vec3_t viewangles, const vec3_t vieworg, mat4_t ou
float cr = cos(-viewangles[2] * M_PI / 180.0); float cr = cos(-viewangles[2] * M_PI / 180.0);
float sr = sin(-viewangles[2] * M_PI / 180.0); float sr = sin(-viewangles[2] * M_PI / 180.0);
out[0] = sr*sp*cy - cr*sy; out[0] = -sr*sp*cy - cr*sy;
out[1] = -cr*sp*cy + sr*sy; out[1] = -cr*sp*cy + sr*sy;
out[2] = -cp*cy; out[2] = -cp*cy;
out[3] = 0; out[3] = 0;
out[4] = -cr*cy - sr*sp*sy; out[4] = sr*sp*sy - cr*cy;
out[5] = sr*cy + cr*sp*sy; out[5] = cr*sp*sy + sr*cy;
out[6] = cp*sy; out[6] = cp*sy;
out[7] = 0; out[7] = 0;
out[8] = -sr*cp; out[8] = sr*cp;
out[9] = cr*cp; out[9] = cr*cp;
out[10] = -sp; out[10] = -sp;
out[11] = 0; out[11] = 0;