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Modifier Volumes: summing up with triangles is faster than using a quad.

This commit is contained in:
Flyinghead 2018-06-26 15:38:55 +02:00
parent 7c93727b5e
commit 6871061ca0
1 changed files with 8 additions and 4 deletions
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12
core/rend/gles/gldraw.cpp
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@ -956,6 +956,8 @@ void DrawModVols(int first, int count)
ModifierVolumeParam* params = &pvrrc.global_param_mvo.head()[first];
int mod_base = -1;
for (u32 cmv = 0; cmv < count; cmv++)
{
ModifierVolumeParam& param = params[cmv];
@ -965,20 +967,22 @@ void DrawModVols(int first, int count)
u32 mv_mode = param.isp.DepthMode;
if (mod_base == -1)
mod_base = param.first;
if (!param.isp.VolumeLast && mv_mode > 0)
SetMVS_Mode(Or, param.isp); // OR'ing (open volume or quad)
else
SetMVS_Mode(Xor, param.isp); // XOR'ing (closed volume)
glDrawArrays(GL_TRIANGLES, param.first * 3, param.count * 3);
if (mv_mode == 1 || mv_mode == 2)
{
// Sum the area
SetMVS_Mode(mv_mode == 1 ? Inclusion : Exclusion, param.isp);
// Use the background poly as a quad to do the sum up
SetupMainVBO();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
SetupModvolVBO();
glDrawArrays(GL_TRIANGLES, mod_base * 3, (param.first + param.count - mod_base) * 3);
mod_base = -1;
}
}
//disable culling