Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-06-25 13:54:37 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

chihiro.cpp: fiddle with backface culling (nw)

Browse Source
This commit is contained in:
yz70s 2016-02-11 19:13:20 +01:00
parent 9c07f76389
commit d93b1366be
1 changed files with 30 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/mame/video/chihiro.cpp
View File

@ -2552,6 +2552,7 @@ void nv2a_renderer::clear_depth_buffer(int what, UINT32 value)
UINT32 nv2a_renderer::render_triangle_culling(const rectangle &cliprect, render_delegate callback, int paramcount, const vertex_t &_v1, const vertex_t &_v2, const vertex_t &_v3) UINT32 nv2a_renderer::render_triangle_culling(const rectangle &cliprect, render_delegate callback, int paramcount, const vertex_t &_v1, const vertex_t &_v2, const vertex_t &_v3)
{ {
float areax2; float areax2;
NV2A_GL_CULL_FACE face = NV2A_GL_CULL_FACE::FRONT;
if (backface_culling_enabled == false) if (backface_culling_enabled == false)
return render_triangle(cliprect, callback, paramcount, _v1, _v2, _v3); return render_triangle(cliprect, callback, paramcount, _v1, _v2, _v3);
@ -2559,13 +2560,25 @@ UINT32 nv2a_renderer::render_triangle_culling(const rectangle &cliprect, render_
return 0; return 0;
areax2 = _v1.x*(_v2.y - _v3.y) + _v2.x*(_v3.y - _v1.y) + _v3.x*(_v1.y - _v2.y); areax2 = _v1.x*(_v2.y - _v3.y) + _v2.x*(_v3.y - _v1.y) + _v3.x*(_v1.y - _v2.y);
if (backface_culling_winding == NV2A_GL_FRONT_FACE::CCW) if (backface_culling_winding == NV2A_GL_FRONT_FACE::CCW)
areax2 = -areax2; {
// if areax2 >= 0 then front faced else back faced if (-areax2 <= 0)
if ((backface_culling_culled == NV2A_GL_CULL_FACE::FRONT) && (areax2 >= 0)) face = NV2A_GL_CULL_FACE::BACK;
return 0; else
if ((backface_culling_culled == NV2A_GL_CULL_FACE::BACK) && (areax2 < 0)) face = NV2A_GL_CULL_FACE::FRONT;
return 0; } else
{
if (areax2 <= 0)
face = NV2A_GL_CULL_FACE::BACK;
else
face = NV2A_GL_CULL_FACE::FRONT;
}
if (face == NV2A_GL_CULL_FACE::FRONT)
if (backface_culling_culled == NV2A_GL_CULL_FACE::BACK)
return render_triangle(cliprect, callback, paramcount, _v1, _v2, _v3); return render_triangle(cliprect, callback, paramcount, _v1, _v2, _v3);
if (face == NV2A_GL_CULL_FACE::BACK)
if (backface_culling_culled == NV2A_GL_CULL_FACE::FRONT)
return render_triangle(cliprect, callback, paramcount, _v1, _v2, _v3);
return 0;
} }
int nv2a_renderer::geforce_exec_method(address_space & space, UINT32 chanel, UINT32 subchannel, UINT32 method, UINT32 address, int &countlen) int nv2a_renderer::geforce_exec_method(address_space & space, UINT32 chanel, UINT32 subchannel, UINT32 method, UINT32 address, int &countlen)
@ -2580,6 +2593,16 @@ int nv2a_renderer::geforce_exec_method(address_space & space, UINT32 chanel, UIN
printf("A:%08X MTHD:%08X D:%08X\n\r",address,maddress,data); printf("A:%08X MTHD:%08X D:%08X\n\r",address,maddress,data);
#endif #endif
if (maddress == 0x17fc) { if (maddress == 0x17fc) {
#if 1 // useful while debugging to see what coordinates have been used
static int debugvc = 0;
if (debugvc)
if (data == 0)
{
printf("%d %d\n\r", primitive_type, vertex_first);
for (int n = 0; n < vertex_first; n++)
printf("%d X:%f Y:%f Z:%f W:%f x:%f y:%f\n\r", n, vertex_software[n].attribute[0].fv[0], vertex_software[n].attribute[0].fv[1], vertex_software[n].attribute[0].fv[2], vertex_software[n].attribute[0].fv[3], vertex_xy[n].x, vertex_xy[n].y);
}
#endif
vertex_count = 0; vertex_count = 0;
vertex_first = 0; vertex_first = 0;
indexesleft_count = 0; indexesleft_count = 0;