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OpenGL Flipped Patch Drawing 

V_FLIP in OpenGL.
This commit is contained in:
Sryder13 2014-03-23 23:37:44 +00:00
parent bb6688107b
commit 103258e364
1 changed files with 28 additions and 8 deletions
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36
src/hardware/hw_draw.c
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@ -179,17 +179,37 @@ void HWR_DrawFixedPatch(GLPatch_t *gpatch, fixed_t x, fixed_t y, fixed_t pscale,
if (option & V_NOSCALESTART)
sdupx = sdupy = 2.0f;
v[0].x = v[3].x = (cx*sdupx-gpatch->leftoffset*pdupx)/vid.width - 1;
v[2].x = v[1].x = (cx*sdupx+(gpatch->width-gpatch->leftoffset)*pdupx)/vid.width - 1;
v[0].y = v[1].y = 1-(cy*sdupy-gpatch->topoffset*pdupy)/vid.height;
v[2].y = v[3].y = 1-(cy*sdupy+(gpatch->height-gpatch->topoffset)*pdupy)/vid.height;
if (option & V_FLIP) // Need to flip both this and sow
{
v[0].x = v[3].x = (cx*sdupx-(gpatch->width-gpatch->leftoffset)*pdupx)/vid.width - 1;
v[2].x = v[1].x = (cx*sdupx+gpatch->leftoffset*pdupx)/vid.width - 1;
v[0].y = v[1].y = 1-(cy*sdupy-gpatch->topoffset*pdupy)/vid.height;
v[2].y = v[3].y = 1-(cy*sdupy+(gpatch->height-gpatch->topoffset)*pdupy)/vid.height;
}
else
{
v[0].x = v[3].x = (cx*sdupx-gpatch->leftoffset*pdupx)/vid.width - 1;
v[2].x = v[1].x = (cx*sdupx+(gpatch->width-gpatch->leftoffset)*pdupx)/vid.width - 1;
v[0].y = v[1].y = 1-(cy*sdupy-gpatch->topoffset*pdupy)/vid.height;
v[2].y = v[3].y = 1-(cy*sdupy+(gpatch->height-gpatch->topoffset)*pdupy)/vid.height;
}
v[0].z = v[1].z = v[2].z = v[3].z = 1.0f;
v[0].sow = v[3].sow = 0.0f;
v[2].sow = v[1].sow = gpatch->max_s;
v[0].tow = v[1].tow = 0.0f;
v[2].tow = v[3].tow = gpatch->max_t;
if (option & V_FLIP)
{
v[0].sow = v[3].sow = gpatch->max_s;
v[2].sow = v[1].sow = 0.0f;
v[0].tow = v[1].tow = 0.0f;
v[2].tow = v[3].tow = gpatch->max_t;
}
else
{
v[0].sow = v[3].sow = 0.0f;
v[2].sow = v[1].sow = gpatch->max_s;
v[0].tow = v[1].tow = 0.0f;
v[2].tow = v[3].tow = gpatch->max_t;
}
flags = BLENDMODE|PF_Clip|PF_NoZClip|PF_NoDepthTest;