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Legacy engine: preliminary per-vertex fixed shading. Only limited testing with LA Machineguns (appears to work), Sega Rally 2 (appears okay), and Scud Race (fixes expert course bridge but not other mis-colored polygons).

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This commit is contained in:
Bart Trzynadlowski 2016-04-29 03:56:06 +00:00
parent 2785ecd25f
commit 57d5bc8367
1 changed files with 24 additions and 8 deletions
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32
Src/Graphics/Legacy3D/Models.cpp
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@ -535,7 +535,7 @@ void CLegacy3D::InsertVertex(ModelCache *Cache, const Vertex *V, const Poly *P,
* - Fighting Vipers 2 shadows are not black anymore.
* - More to follow...
*/
/*
unsigned modulate = (step >= 0x20) ? !(P->header[4]&0x80) : (P->header[3]&0x80 && lightEnable);
if (texEnable)
{
@ -543,10 +543,25 @@ void CLegacy3D::InsertVertex(ModelCache *Cache, const Vertex *V, const Poly *P,
if (!modulate)
r = g = b = 1.0f;
}
*/
/*
int modulate = 0;//((P->header[5]>>22) & 1);
int fixedShading = ((P->header[5]>>23) & 1);
/*
* Fixed per-vertex shading appears to only be active in LA Machineguns for
* polygons where bits 0x20 and 0x08 of word 1 are set to 1 and 0,
* respectively. Confirmed in both Scud Race and LA Machineguns that such
* polygons contain 0's in normal Y and Z component.
*
* Fixed shading appears to multiply the polygon color, else LA Machineguns
* enemy target reticles and Sega Rally 2 dust trails are mis-colored.
*
* This code is still not correct for Scud Race, although it illuminates the
* expert stage bridge battlements.
*
* To-do: What is the significance of the two fixed shading bits? What are
* other possible settings for them? What if lighting already disabled?
*/
int modulate = !(P->header[4] & 0x80);
int fixedShading = (P->header[1] & 0x20) && !(P->header[1] & 0x08);
if (texEnable)
{
if (!modulate)
@ -555,11 +570,10 @@ void CLegacy3D::InsertVertex(ModelCache *Cache, const Vertex *V, const Poly *P,
if (fixedShading)
{
lightEnable = 0;
r = V->intensity;
g = V->intensity;
b = V->intensity;
r *= V->intensity;
g *= V->intensity;
b *= V->intensity;
}
*/
// Specular shininess
int shininess = (P->header[0]>>26)&0x3F;
@ -947,6 +961,8 @@ struct VBORef *CLegacy3D::CacheModel(ModelCache *Cache, int lutIdx, UINT16 texOf
P.Vert[j].u = (GLfloat) ((UINT16)(it>>16)) * uvScale; // TO-DO: might these be signed?
P.Vert[j].v = (GLfloat) ((UINT16)(it&0xFFFF)) * uvScale;
P.Vert[j].intensity = GLfloat((255 - (ix & 0xFF))) / 255.0;
//if ((P.header[1] & 0x20) && !(P.header[1] & 0x08))
// printf("%02x %02x %02x\n", ix&0xff, iy&0xff, iz&0xff);
data += 4;
// Normalize the vertex normal