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Added code to show tangent space

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This commit is contained in:
cholleme 2003-06-25 09:59:55 +00:00
parent 8832969132
commit 963a24e391
1 changed files with 54 additions and 0 deletions
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54
gl_bumpdriver.c
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@ -53,6 +53,52 @@ Temp backwards compatibility
**************************/
void R_DrawTangents (vertexdef_t *def, int num)
{
float* vert;
float* normal;
float* binormal;
float* tangent;
int vstr, nstr, tstr, bstr;
vec3_t extr;
int i;
vert = def->vertices;
normal = def->normals;
binormal = def->binormals;
tangent = def->tangents;
vstr = (def->vertexstride == 0) ? 3 : def->vertexstride/4;
nstr = (def->normalstride == 0) ? 3 : def->normalstride/4;
tstr = (def->tangentstride == 0) ? 3 : def->tangentstride/4;
bstr = (def->binormalstride == 0) ? 3 : def->binormalstride/4;
for (i=0; i<num; i++, vert+=vstr, normal+=nstr, binormal+=bstr, tangent+=tstr) {
glColor3ub(255,0,0);
glBegin(GL_LINES);
glVertex3fv(&vert[0]);
VectorMA(vert,1,normal,extr);
glVertex3fv(&extr[0]);
glEnd();
glColor3ub(0,255,0);
glBegin(GL_LINES);
glVertex3fv(&vert[0]);
VectorMA(vert,1,tangent,extr);
glVertex3fv(&extr[0]);
glEnd();
glColor3ub(0,0,255);
glBegin(GL_LINES);
glVertex3fv(&vert[0]);
VectorMA(vert,1,binormal,extr);
glVertex3fv(&extr[0]);
glEnd();
}
}
void R_DrawMeshAmbient(mesh_t *mesh) {
vertexdef_t def;
@ -94,6 +140,10 @@ void R_DrawMeshAmbient(mesh_t *mesh) {
} else {
gl_bumpdriver.drawTriangleListBase(&def, mesh->indecies, mesh->numindecies, mesh->shader->shader, mesh->lightmapIndex);
}
if (sh_showtangent.value) {
R_DrawTangents(&def, mesh->numvertices);
}
}
void R_DrawMeshBumped(mesh_t *mesh) {
@ -147,6 +197,10 @@ void R_DrawAliasAmbient(aliashdr_t *paliashdr, aliasframeinstant_t *instant) {
c_alias_polys += paliashdr->numtris;
gl_bumpdriver.drawTriangleListBase(&def, (int *)((byte *)paliashdr + paliashdr->indecies),paliashdr->numtris*3,paliashdr->shader, -1);
if (sh_showtangent.value) {
R_DrawTangents(&def, paliashdr->numtris*3);
}
}
void R_DrawAliasBumped(aliashdr_t *paliashdr, aliasframeinstant_t *instant) {