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Backport from ogl-es into the opengl driver: Use INCR_WRAP and DECR_WRAP when available even for the usual stencil algorithms, to avoid holes in the shadow.

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git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2392 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
hybrid 2009-05-11 20:17:37 +00:00
parent 00193a810f
commit 9d9024f5d6
1 changed files with 22 additions and 24 deletions
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46
source/Irrlicht/COpenGLDriver.cpp
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@ -2605,6 +2605,16 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
GLenum incr = GL_INCR;
GLenum decr = GL_DECR;
#ifdef GL_EXT_stencil_wrap
if (FeatureAvailable[IRR_EXT_stencil_wrap])
{
incr = GL_INCR_WRAP_EXT;
decr = GL_DECR_WRAP_EXT;
}
#endif
// The first parts are not correctly working, yet.
#if 0
#ifdef GL_EXT_stencil_two_side
@ -2621,18 +2631,12 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
// ZPASS Method
extGlActiveStencilFace(GL_BACK);
if (FeatureAvailable[IRR_EXT_stencil_wrap])
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
else
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
glStencilOp(GL_KEEP, GL_KEEP, decr);
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
extGlActiveStencilFace(GL_FRONT);
if (FeatureAvailable[IRR_EXT_stencil_wrap])
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
else
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
glStencilOp(GL_KEEP, GL_KEEP, incr);
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
@ -2643,18 +2647,12 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
// ZFAIL Method
extGlActiveStencilFace(GL_BACK);
if (FeatureAvailable[IRR_EXT_stencil_wrap])
glStencilOp(GL_KEEP, GL_INCR_WRAP_EXT, GL_KEEP);
else
glStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
glStencilOp(GL_KEEP, incr, GL_KEEP);
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
extGlActiveStencilFace(GL_FRONT);
if (FeatureAvailable[IRR_EXT_stencil_wrap])
glStencilOp(GL_KEEP, GL_DECR_WRAP_EXT, GL_KEEP);
else
glStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
glStencilOp(GL_KEEP, decr, GL_KEEP);
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
@ -2670,8 +2668,8 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
{
// ZPASS Method
extGlStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
extGlStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
extGlStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, decr);
extGlStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, incr);
extGlStencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS, 0, ~0);
glStencilMask(~0);
@ -2681,8 +2679,8 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
{
// ZFAIL Method
extGlStencilOpSeparate(GL_BACK, GL_KEEP, GL_INCR, GL_KEEP);
extGlStencilOpSeparate(GL_FRONT, GL_KEEP, GL_DECR, GL_KEEP);
extGlStencilOpSeparate(GL_BACK, GL_KEEP, incr, GL_KEEP);
extGlStencilOpSeparate(GL_FRONT, GL_KEEP, decr, GL_KEEP);
extGlStencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS, 0, ~0);
glDrawArrays(GL_TRIANGLES,0,count);
@ -2697,22 +2695,22 @@ void COpenGLDriver::drawStencilShadowVolume(const core::vector3df* triangles, s3
// ZPASS Method
glCullFace(GL_BACK);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
glStencilOp(GL_KEEP, GL_KEEP, incr);
glDrawArrays(GL_TRIANGLES,0,count);
glCullFace(GL_FRONT);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
glStencilOp(GL_KEEP, GL_KEEP, decr);
glDrawArrays(GL_TRIANGLES,0,count);
}
else
{
// ZFAIL Method
glStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
glStencilOp(GL_KEEP, incr, GL_KEEP);
glCullFace(GL_FRONT);
glDrawArrays(GL_TRIANGLES,0,count);
glStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
glStencilOp(GL_KEEP, decr, GL_KEEP);
glCullFace(GL_BACK);
glDrawArrays(GL_TRIANGLES,0,count);
}