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- added some checks to the wall rendering code that will allow to disable the clip planes in many cases, even when a plane mirror portal is active. This also solves the precision issue with using world coordinates for clip checks.

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This commit is contained in:
Christoph Oelckers 2014-07-13 17:15:17 +02:00
parent 00fcf4bc06
commit 9230a20f18
2 changed files with 10 additions and 4 deletions
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5
src/gl/scene/gl_portal.cpp
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@ -794,9 +794,8 @@ void GLPlaneMirrorPortal::DrawContents()
validcount++;
float f = FIXED2FLOAT(planez);
// the coordinate fudging is needed because for some reason this is nowhere near precise and leaves gaps. Strange...
if (PlaneMirrorMode < 0) gl_RenderState.SetClipHeightTop(f+0.3f); // ceiling mirror: clip everytihng with a z lower than the portal's ceiling
else gl_RenderState.SetClipHeightBottom(f-0.3f); // floor mirror: clip everything with a z higher than the portal's floor
if (PlaneMirrorMode < 0) gl_RenderState.SetClipHeightTop(f); // ceiling mirror: clip everytihng with a z lower than the portal's ceiling
else gl_RenderState.SetClipHeightBottom(f); // floor mirror: clip everything with a z higher than the portal's floor
PlaneMirrorFlag++;
GLRenderer->SetupView(viewx, viewy, viewz, viewangle, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));

9
src/gl/scene/gl_walls_draw.cpp
View file

@ -225,7 +225,7 @@ void GLWall::SetupLights()
void GLWall::RenderWall(int textured, ADynamicLight * light, unsigned int *store)
{
texcoord tcs[4];
static texcoord tcs[4]; // making this variable static saves us a relatively costly stack integrity check.
bool split = (gl_seamless && !(textured&RWF_NOSPLIT) && seg->sidedef != NULL && !(seg->sidedef->Flags & WALLF_POLYOBJ));
if (!light)
@ -249,7 +249,14 @@ void GLWall::RenderWall(int textured, ADynamicLight * light, unsigned int *store
if (!(textured & RWF_NORENDER))
{
// disable the clip plane if it isn't needed (which can be determined by a simple check.)
float ct = gl_RenderState.GetClipHeightTop();
float cb = gl_RenderState.GetClipHeightBottom();
if (ztop[0] <= ct && ztop[1] <= ct) gl_RenderState.SetClipHeightTop(65536.f);
if (zbottom[0] >= cb && zbottom[1] >= cb) gl_RenderState.SetClipHeightBottom(-65536.f);
gl_RenderState.Apply();
gl_RenderState.SetClipHeightTop(ct);
gl_RenderState.SetClipHeightBottom(cb);
}
// the rest of the code is identical for textured rendering and lights