/**
* @brief Puts the map data into buffers
* @sa R_ModAddMapTile
* @note Shift the verts after the texcoords for diffuse and lightmap are loaded
* @sa R_ModShiftTile
* @todo Don't use the buffers from r_state here - they might overflow
* @todo Decrease MAX_GL_ARRAY_LENGTH to 32768 again when this is fixed
*/
static void R_LoadBspVertexArrays (model_t *mod)
{
int i, j;
int vertind, coordind, tangind;
float *vecShifted;
float soff, toff, s, t;
float *point, *sdir, *tdir;
vec4_t tangent;
vec3_t binormal;
mBspSurface_t *surf;
mBspVertex_t *vert;
int vertexcount;
vertind = coordind = tangind = vertexcount = 0;
for (i = 0, surf = mod->bsp.surfaces; i < mod->bsp.numsurfaces; i++, surf++)
for (j = 0; j < surf->numedges; j++)
vertexcount++;
surf = mod->bsp.surfaces;
/* allocate the vertex arrays */
mod->bsp.texcoords = (GLfloat *)Mem_PoolAlloc(vertexcount * 2 * sizeof(GLfloat), vid_modelPool, 0);
mod->bsp.lmtexcoords = (GLfloat *)Mem_PoolAlloc(vertexcount * 2 * sizeof(GLfloat), vid_modelPool, 0);
mod->bsp.verts = (GLfloat *)Mem_PoolAlloc(vertexcount * 3 * sizeof(GLfloat), vid_modelPool, 0);
mod->bsp.normals = (GLfloat *)Mem_PoolAlloc(vertexcount * 3 * sizeof(GLfloat), vid_modelPool, 0);
mod->bsp.tangents = (GLfloat *)Mem_PoolAlloc(vertexcount * 4 * sizeof(GLfloat), vid_modelPool, 0);
for (i = 0; i < mod->bsp.numsurfaces; i++, surf++) {
surf->index = vertind / 3;
for (j = 0; j < surf->numedges; j++) {
const float *normal;
const int index = mod->bsp.surfedges[surf->firstedge + j];
if (vertind >= MAX_GL_ARRAY_LENGTH * 3)
Com_Error(ERR_DROP, "R_LoadBspVertexArrays: Exceeded MAX_GL_ARRAY_LENGTH %i", vertind);
/* vertex */
if (index > 0) { /* negative indices to differentiate which end of the edge */
const mBspEdge_t *edge = &mod->bsp.edges[index];
vert = &mod->bsp.vertexes[edge->v[0]];
} else {
const mBspEdge_t *edge = &mod->bsp.edges[-index];
vert = &mod->bsp.vertexes[edge->v[1]];
}
point = vert->position;
/* shift it for assembled maps */
vecShifted = &mod->bsp.verts[vertind];
/* origin (func_door, func_rotating) bmodels must not have shifted vertices,
* they are translated by their entity origin value */
if (surf->isOriginBrushModel)
VectorCopy(point, vecShifted);
else
VectorAdd(point, shift, vecShifted);
/* texture directional vectors and offsets */
sdir = surf->texinfo->uv;
soff = surf->texinfo->u_offset;
tdir = surf->texinfo->vv;
toff = surf->texinfo->v_offset;
/* texture coordinates */
s = DotProduct(point, sdir) + soff;
s /= surf->texinfo->image->width;
t = DotProduct(point, tdir) + toff;
t /= surf->texinfo->image->height;
mod->bsp.texcoords[coordind + 0] = s;
mod->bsp.texcoords[coordind + 1] = t;
if (surf->flags & MSURF_LIGHTMAP) { /* lightmap coordinates */
s = DotProduct(point, sdir) + soff;
s -= surf->stmins[0];
s += surf->light_s * surf->lightmap_scale;
s += surf->lightmap_scale / 2.0;
s /= r_lightmaps.size * surf->lightmap_scale;
t = DotProduct(point, tdir) + toff;
t -= surf->stmins[1];
t += surf->light_t * surf->lightmap_scale;
t += surf->lightmap_scale / 2.0;
t /= r_lightmaps.size * surf->lightmap_scale;
}
mod->bsp.lmtexcoords[coordind + 0] = s;
mod->bsp.lmtexcoords[coordind + 1] = t;
/* normal vectors */
if (surf->texinfo->flags & SURF_PHONG && VectorNotEmpty(vert->normal))
normal = vert->normal; /* phong shaded */
else
normal = surf->normal; /* per plane */
memcpy(&mod->bsp.normals[vertind], normal, sizeof(vec3_t));
/* tangent vector */
TangentVectors(normal, sdir, tdir, tangent, binormal);
memcpy(&mod->bsp.tangents[tangind], tangent, sizeof(vec4_t));
vertind += 3;
coordind += 2;
tangind += 4;
}
}
if (qglBindBuffer) {
/* and also the vertex buffer objects */
qglGenBuffers(1, &mod->bsp.vertex_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.vertex_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertind * sizeof(GLfloat), mod->bsp.verts, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.texcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.texcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, coordind * sizeof(GLfloat), mod->bsp.texcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.lmtexcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.lmtexcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, coordind * sizeof(GLfloat), mod->bsp.lmtexcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.normal_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.normal_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertind * sizeof(GLfloat), mod->bsp.normals, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.tangent_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.tangent_buffer);
qglBufferData(GL_ARRAY_BUFFER, tangind * sizeof(GLfloat), mod->bsp.tangents, GL_STATIC_DRAW);
qglBindBuffer(GL_ARRAY_BUFFER, 0);
}
}
/*
* R_LoadBspVertexArrays
*/
static void R_LoadBspVertexArrays(void) {
int i, j;
int vert_index, texcoord_index, tangent_index, color_index;
float soff, toff, s, t;
float *point, *normal, *sdir, *tdir;
vec4_t tangent;
vec3_t bitangent;
r_bsp_surface_t *surf;
r_bsp_edge_t *edge;
r_bsp_vertex_t *vert;
R_AllocVertexArrays(r_load_model); // allocate the arrays
vert_index = texcoord_index = tangent_index = 0;
surf = r_load_model->surfaces;
for (i = 0; i < r_load_model->num_surfaces; i++, surf++) {
surf->index = vert_index / 3;
for (j = 0; j < surf->num_edges; j++) {
const int index = r_load_model->surface_edges[surf->first_edge + j];
// vertex
if (index > 0) { // negative indices to differentiate which end of the edge
edge = &r_load_model->edges[index];
vert = &r_load_model->vertexes[edge->v[0]];
} else {
edge = &r_load_model->edges[-index];
vert = &r_load_model->vertexes[edge->v[1]];
}
point = vert->position;
memcpy(&r_load_model->verts[vert_index], point, sizeof(vec3_t));
// texture directional vectors and offsets
sdir = surf->texinfo->vecs[0];
soff = surf->texinfo->vecs[0][3];
tdir = surf->texinfo->vecs[1];
toff = surf->texinfo->vecs[1][3];
// texture coordinates
s = DotProduct(point, sdir) + soff;
s /= surf->texinfo->image->width;
t = DotProduct(point, tdir) + toff;
t /= surf->texinfo->image->height;
r_load_model->texcoords[texcoord_index + 0] = s;
r_load_model->texcoords[texcoord_index + 1] = t;
if (surf->flags & R_SURF_LIGHTMAP) { // lightmap coordinates
s = DotProduct(point, sdir) + soff;
s -= surf->st_mins[0];
s += surf->light_s * r_load_model->lightmap_scale;
s += r_load_model->lightmap_scale / 2.0;
s /= r_lightmaps.size * r_load_model->lightmap_scale;
t = DotProduct(point, tdir) + toff;
t -= surf->st_mins[1];
t += surf->light_t * r_load_model->lightmap_scale;
t += r_load_model->lightmap_scale / 2.0;
t /= r_lightmaps.size * r_load_model->lightmap_scale;
}
r_load_model->lmtexcoords[texcoord_index + 0] = s;
r_load_model->lmtexcoords[texcoord_index + 1] = t;
// normal vector
if ((surf->texinfo->flags & SURF_PHONG) && !VectorCompare(
vert->normal, vec3_origin)) // phong shaded
normal = vert->normal;
else
// per-plane
normal = surf->normal;
memcpy(&r_load_model->normals[vert_index], normal, sizeof(vec3_t));
// tangent vector
TangentVectors(normal, sdir, tdir, tangent, bitangent);
memcpy(&r_load_model->tangents[tangent_index], tangent, sizeof(vec4_t));
// accumulate colors
R_AddBspVertexColor(vert, surf);
vert_index += 3;
texcoord_index += 2;
tangent_index += 4;
}
}
color_index = 0;
surf = r_load_model->surfaces;
// now iterate over the verts again, assembling the accumulated colors
for (i = 0; i < r_load_model->num_surfaces; i++, surf++) {
for (j = 0; j < surf->num_edges; j++) {
const int index = r_load_model->surface_edges[surf->first_edge + j];
// vertex
if (index > 0) { // negative indices to differentiate which end of the edge
edge = &r_load_model->edges[index];
vert = &r_load_model->vertexes[edge->v[0]];
} else {
edge = &r_load_model->edges[-index];
vert = &r_load_model->vertexes[edge->v[1]];
}
memcpy(&r_load_model->colors[color_index], vert->color, sizeof(vec4_t));
color_index += 4;
}
}
}
void PolygonGroup::BuildTangentsBinormals(uint32 flagsToAdd)
{
if (!(vertexFormat & EVF_TANGENT))
{
// Dirty hack. Copy pointers of this polygon group
// PolygonGroup * oldGroup = this;
// AllocateData(oldGroup->GetVertexFormat() | flagsToAdd, oldGroup->GetVertexCount(), oldGroup->GetIndexCount());
// CopyFrom(oldGroup);
// SafeRelease(oldGroup);
}
for (int v = 0; v < vertexCount; ++v)
{
//Vector3 * tan0 = (Vector3 *)((uint8 *)normalArray + v * vertexStride);
Vector3 * tan1 = (Vector3 *)((uint8 *)tangentArray + v * vertexStride);
Vector3 * tan2 = (Vector3 *)((uint8 *)binormalArray + v * vertexStride);
//*tan0 = Vector3(0.0f, 0.0f, 0.0f);
tan1->x = 0;
tan1->y = 0;
tan1->z = 0;
tan2->x = 0;
tan2->y = 0;
tan2->z = 0;
}
for (int t = 0; t < triangleCount; ++t)
{
int32 i1 = indexArray[t * 3];
int32 i2 = indexArray[t * 3 + 1];
int32 i3 = indexArray[t * 3 + 2];
Vector3 v1 = *(Vector3 *)((uint8 *)vertexArray + i1 * vertexStride);
Vector3 v2 = *(Vector3 *)((uint8 *)vertexArray + i2 * vertexStride);
Vector3 v3 = *(Vector3 *)((uint8 *)vertexArray + i3 * vertexStride);
// use first texture coordinate
Vector2 w1 = *(Vector2 *)((uint8 *)textureCoordArray[0] + i1 * vertexStride);
Vector2 w2 = *(Vector2 *)((uint8 *)textureCoordArray[0] + i2 * vertexStride);
Vector2 w3 = *(Vector2 *)((uint8 *)textureCoordArray[0] + i3 * vertexStride);
//float32 x1 = v2.x - v1.x;
//float32 x2 = v3.x - v1.x;
//float32 y1 = v2.y - v1.y;
//float32 y2 = v3.y - v1.y;
//float32 z1 = v2.z - v1.z;
//float32 z2 = v3.z - v1.z;
//float32 s1 = w2.x - w1.x;
//float32 s2 = w3.x - w1.x;
//float32 t1 = w2.y - w1.y;
//float32 t2 = w3.y - w1.y;
//float r = 1.0F / (s1 * t2 - s2 * t1);
//Vector3 sdir((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r,
// (t2 * z1 - t1 * z2) * r);
//Vector3 tdir((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r,
// (s1 * z2 - s2 * z1) * r);
Vector3 sdir, tdir, norm;
TangentVectors(v1, v2, v3, w1, w2, w3, sdir, tdir, norm);
//Vector3 * nor1 = (Vector3 *)((uint8 *)normalArray + i1 * vertexStride);
//Vector3 * nor2 = (Vector3 *)((uint8 *)normalArray + i2 * vertexStride);
//Vector3 * nor3 = (Vector3 *)((uint8 *)normalArray + i3 * vertexStride);
Vector3 * tan1 = (Vector3 *)((uint8 *)tangentArray + i1 * vertexStride);
Vector3 * tan2 = (Vector3 *)((uint8 *)tangentArray + i2 * vertexStride);
Vector3 * tan3 = (Vector3 *)((uint8 *)tangentArray + i3 * vertexStride);
Vector3 * tan21 = (Vector3 *)((uint8 *)binormalArray + i1 * vertexStride);
Vector3 * tan22 = (Vector3 *)((uint8 *)binormalArray + i2 * vertexStride);
Vector3 * tan23 = (Vector3 *)((uint8 *)binormalArray + i3 * vertexStride);
//*nor1 += norm;
//*nor2 += norm;
//*nor3 += norm;
*tan1 += sdir;
*tan2 += sdir;
*tan3 += sdir;
*tan21 += tdir;
*tan22 += tdir;
*tan23 += tdir;
}
for (int v = 0; v < vertexCount; ++v)
{
Vector3 * nres = (Vector3 *)((uint8 *)normalArray + v * vertexStride);
Vector3 * tres = (Vector3 *)((uint8 *)tangentArray + v * vertexStride);
Vector3 * bres = (Vector3 *)((uint8 *)binormalArray + v * vertexStride);
*bres = -*bres;
nres->Normalize();
tres->Normalize();
bres->Normalize();
//Vector3 n = *nres;
//Vector3 t = *tres;
//Vector3 t2 = *bres;
//*tres = (t - DotProduct(n, t) * n);
//
////tres->x = -tres->x;
////tres->y = -tres->y;
////tres->z = -tres->z;
////nres->x = -nres->x;
////nres->y = -nres->y;
////nres->z = -nres->z;
//tres->Normalize();
//
//float32 handedness = (DotProduct(CrossProduct(n, t), t2) < 0.0f) ? (-1.0f) : (1.0f);
//if (vertexFormat & EVF_BINORMAL)
//{
// *bres = CrossProduct(*tres, *nres);
// bres->Normalize();
//}
////*bres = -*bres;
//*tres = -*tres;
/*
BORODA: Removed unused variable
Vector3 nrecomp = CrossProduct(*tres, *bres);
*/
// int xt = 0;
// use this method (get from .. http://www.c4engine.com/code/tangent.html);
//const Vector3D& n = normal[a];
//const Vector3D& t = tan1[a];
//// Gram-Schmidt orthogonalize
// tangent[a] = (t - n * Dot(n, t)).Normalize();
//
// // Calculate handedness
// tangent[a].w = (Dot(Cross(n, t), tan2[a]) < 0.0F) ? -1.0F : 1.0F;
}
}
/**
* @brief Puts the map data into buffers
* @sa R_ModAddMapTile
* @note Shift the verts after the texcoords for diffuse and lightmap are loaded
* @sa R_ModShiftTile
* @todo Don't use the buffers from r_state here - they might overflow
* @todo Decrease MAX_GL_ARRAY_LENGTH to 32768 again when this is fixed
*/
static void R_LoadBspVertexArrays (model_t *mod)
{
int i, j;
int vertOfs, texCoordOfs, tangOfs;
float *vecShifted;
float soff, toff, s, t;
float *point, *sdir, *tdir;
vec4_t tangent;
vec3_t binormal;
mBspSurface_t *surf;
mBspVertex_t *vert;
int vertexCount, indexCount;
vertOfs = texCoordOfs = tangOfs = 0;
vertexCount = indexCount = 0;
for (i = 0, surf = mod->bsp.surfaces; i < mod->bsp.numsurfaces; i++, surf++) {
const int numedges = surf->numedges;
vertexCount += numedges;
if (numedges > 2) /* no triangles for degenerate polys */
indexCount += (numedges - 2) * 3;
}
surf = mod->bsp.surfaces;
/* allocate the vertex arrays */
mod->bsp.texcoords = Mem_PoolAllocTypeN(GLfloat, vertexCount * 2, vid_modelPool);
mod->bsp.lmtexcoords = Mem_PoolAllocTypeN(GLfloat, vertexCount * 2, vid_modelPool);
mod->bsp.verts = Mem_PoolAllocTypeN(GLfloat, vertexCount * 3, vid_modelPool);
mod->bsp.normals = Mem_PoolAllocTypeN(GLfloat, vertexCount * 3, vid_modelPool);
mod->bsp.tangents = Mem_PoolAllocTypeN(GLfloat, vertexCount * 4, vid_modelPool);
mod->bsp.indexes = Mem_PoolAllocTypeN(GLint, indexCount, vid_modelPool); /* Will be filled at the end of map loading, after building surface lists */
for (i = 0; i < mod->bsp.numsurfaces; i++, surf++) {
surf->index = vertOfs / 3;
surf->firstTriangle = -1; /* Mark as "no triangles generated yet" */
for (j = 0; j < surf->numedges; j++) {
const float *normal;
const int index = mod->bsp.surfedges[surf->firstedge + j];
/* vertex */
if (index > 0) { /* negative indices to differentiate which end of the edge */
const mBspEdge_t *edge = &mod->bsp.edges[index];
vert = &mod->bsp.vertexes[edge->v[0]];
} else {
const mBspEdge_t *edge = &mod->bsp.edges[-index];
vert = &mod->bsp.vertexes[edge->v[1]];
}
point = vert->position;
/* shift it for assembled maps */
vecShifted = &mod->bsp.verts[vertOfs];
/* origin (func_door, func_rotating) bmodels must not have shifted vertices,
* they are translated by their entity origin value */
if (surf->isOriginBrushModel)
VectorCopy(point, vecShifted);
else
VectorAdd(point, shift, vecShifted);
/* texture directional vectors and offsets */
sdir = surf->texinfo->uv;
soff = surf->texinfo->u_offset;
tdir = surf->texinfo->vv;
toff = surf->texinfo->v_offset;
/* texture coordinates */
s = DotProduct(point, sdir) + soff;
s /= surf->texinfo->image->width;
t = DotProduct(point, tdir) + toff;
t /= surf->texinfo->image->height;
mod->bsp.texcoords[texCoordOfs + 0] = s;
mod->bsp.texcoords[texCoordOfs + 1] = t;
if (surf->flags & MSURF_LIGHTMAP) { /* lightmap coordinates */
s = DotProduct(point, sdir) + soff;
s -= surf->stmins[0];
s += surf->light_s * surf->lightmap_scale;
s += surf->lightmap_scale / 2.0;
s /= r_lightmaps.size * surf->lightmap_scale;
t = DotProduct(point, tdir) + toff;
t -= surf->stmins[1];
t += surf->light_t * surf->lightmap_scale;
t += surf->lightmap_scale / 2.0;
t /= r_lightmaps.size * surf->lightmap_scale;
}
mod->bsp.lmtexcoords[texCoordOfs + 0] = s;
mod->bsp.lmtexcoords[texCoordOfs + 1] = t;
/* normal vectors */
if ((surf->texinfo->flags & SURF_PHONG) && VectorNotEmpty(vert->normal))
normal = vert->normal; /* phong shaded */
else
normal = surf->normal; /* per plane */
memcpy(&mod->bsp.normals[vertOfs], normal, sizeof(vec3_t));
/* tangent vector */
TangentVectors(normal, sdir, tdir, tangent, binormal);
memcpy(&mod->bsp.tangents[tangOfs], tangent, sizeof(vec4_t));
vertOfs += 3;
texCoordOfs += 2;
tangOfs += 4;
}
}
R_ReallocateStateArrays(vertOfs / 3);
if (qglBindBuffer) {
/* and also the vertex buffer objects */
qglGenBuffers(1, &mod->bsp.vertex_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.vertex_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertOfs * sizeof(GLfloat), mod->bsp.verts, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.texcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.texcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, texCoordOfs * sizeof(GLfloat), mod->bsp.texcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.lmtexcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.lmtexcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, texCoordOfs * sizeof(GLfloat), mod->bsp.lmtexcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.normal_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.normal_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertOfs * sizeof(GLfloat), mod->bsp.normals, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.tangent_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.tangent_buffer);
qglBufferData(GL_ARRAY_BUFFER, tangOfs * sizeof(GLfloat), mod->bsp.tangents, GL_STATIC_DRAW);
qglBindBuffer(GL_ARRAY_BUFFER, 0);
}
}
/**
* @brief
* @sa FinalLightFace
*/
void BuildFacelights (unsigned int facenum)
{
dBspSurface_t* face;
dBspPlane_t* plane;
dBspTexinfo_t* tex;
float* center;
float* sdir, *tdir;
vec3_t normal, binormal;
vec4_t tangent;
lightinfo_t li;
float scale;
int i, j, numsamples;
facelight_t* fl;
int* headhints;
const int grid_type = config.soft ? 1 : 0;
if (facenum >= MAX_MAP_FACES) {
Com_Printf("MAX_MAP_FACES hit\n");
return;
}
face = &curTile->faces[facenum];
plane = &curTile->planes[face->planenum];
tex = &curTile->texinfo[face->texinfo];
if (tex->surfaceFlags & SURF_WARP)
return; /* non-lit texture */
sdir = tex->vecs[0];
tdir = tex->vecs[1];
/* lighting -extra antialiasing */
if (config.extrasamples)
numsamples = config.soft ? SOFT_SAMPLES : MAX_SAMPLES;
else
numsamples = 1;
OBJZERO(li);
scale = 1.0 / numsamples; /* each sample contributes this much */
li.face = face;
li.facedist = plane->dist;
VectorCopy(plane->normal, li.facenormal);
/* negate the normal and dist */
if (face->side) {
VectorNegate(li.facenormal, li.facenormal);
li.facedist = -li.facedist;
}
/* get the origin offset for rotating bmodels */
VectorCopy(face_offset[facenum], li.modelorg);
/* calculate lightmap texture mins and maxs */
CalcLightinfoExtents(&li);
/* and the lightmap texture vectors */
CalcLightinfoVectors(&li);
/* now generate all of the sample points */
CalcPoints(&li, 0, 0);
fl = &facelight[config.compile_for_day][facenum];
fl->numsamples = li.numsurfpt;
fl->samples = Mem_AllocTypeN(vec3_t, fl->numsamples);
fl->directions = Mem_AllocTypeN(vec3_t, fl->numsamples);
center = face_extents[facenum].center; /* center of the face */
/* Also setup the hints. Each hint is specific to each light source, including sunlight. */
headhints = Mem_AllocTypeN(int, (numlights[config.compile_for_day] + 1));
/* calculate light for each sample */
for (i = 0; i < fl->numsamples; i++) {
float* const sample = fl->samples[i]; /* accumulate lighting here */
float* const direction = fl->directions[i]; /* accumulate direction here */
if (tex->surfaceFlags & SURF_PHONG)
/* interpolated normal */
SampleNormal(&li, li.surfpt[i], normal);
else
/* or just plane normal */
VectorCopy(li.facenormal, normal);
for (j = 0; j < numsamples; j++) { /* with antialiasing */
vec3_t pos;
/* add offset for supersampling */
VectorMA(li.surfpt[i], sampleofs[grid_type][j][0] * li.step, li.textoworld[0], pos);
VectorMA(pos, sampleofs[grid_type][j][1] * li.step, li.textoworld[1], pos);
NudgeSamplePosition(pos, normal, center, pos);
GatherSampleLight(pos, normal, sample, direction, scale, headhints);
}
if (VectorNotEmpty(direction)) {
vec3_t dir;
/* normalize it */
VectorNormalize(direction);
/* finalize the lighting direction for the sample */
TangentVectors(normal, sdir, tdir, tangent, binormal);
dir[0] = DotProduct(direction, tangent);
dir[1] = DotProduct(direction, binormal);
dir[2] = DotProduct(direction, normal);
VectorCopy(dir, direction);
}
}
/* Free the hints. */
Mem_Free(headhints);
for (i = 0; i < fl->numsamples; i++) { /* pad them */
float* const direction = fl->directions[i];
if (VectorEmpty(direction))
VectorSet(direction, 0.0, 0.0, 1.0);
}
/* free the sample positions for the face */
Mem_Free(li.surfpt);
}
/*
* @brief Writes vertex data for the given surface to the load model's arrays.
*
* @param count The current vertex count for the load model.
*/
static void R_LoadBspVertexArrays_Surface(r_model_t *mod, r_bsp_surface_t *surf, GLuint *count) {
uint16_t i;
surf->index = *count;
for (i = 0; i < surf->num_edges; i++) {
const int32_t index = mod->bsp->surface_edges[surf->first_edge + i];
const r_bsp_edge_t *edge;
r_bsp_vertex_t *vert;
// vertex
if (index > 0) { // negative indices to differentiate which end of the edge
edge = &mod->bsp->edges[index];
vert = &mod->bsp->vertexes[edge->v[0]];
} else {
edge = &mod->bsp->edges[-index];
vert = &mod->bsp->vertexes[edge->v[1]];
}
memcpy(&mod->verts[(*count) * 3], vert->position, sizeof(vec3_t));
// texture directional vectors and offsets
const vec_t *sdir = surf->texinfo->vecs[0];
const vec_t soff = surf->texinfo->vecs[0][3];
const vec_t *tdir = surf->texinfo->vecs[1];
const vec_t toff = surf->texinfo->vecs[1][3];
// texture coordinates
vec_t s = DotProduct(vert->position, sdir) + soff;
s /= surf->texinfo->material->diffuse->width;
vec_t t = DotProduct(vert->position, tdir) + toff;
t /= surf->texinfo->material->diffuse->height;
mod->texcoords[(*count) * 2 + 0] = s;
mod->texcoords[(*count) * 2 + 1] = t;
// lightmap texture coordinates
if (surf->flags & R_SURF_LIGHTMAP) {
s = DotProduct(vert->position, sdir) + soff;
s -= surf->st_mins[0];
s += surf->light_s * mod->bsp->lightmaps->scale;
s += mod->bsp->lightmaps->scale / 2.0;
s /= surf->lightmap->width * mod->bsp->lightmaps->scale;
t = DotProduct(vert->position, tdir) + toff;
t -= surf->st_mins[1];
t += surf->light_t * mod->bsp->lightmaps->scale;
t += mod->bsp->lightmaps->scale / 2.0;
t /= surf->lightmap->height * mod->bsp->lightmaps->scale;
}
mod->lightmap_texcoords[(*count) * 2 + 0] = s;
mod->lightmap_texcoords[(*count) * 2 + 1] = t;
// normal vector, which is per-vertex for SURF_PHONG
const vec_t *normal;
if ((surf->texinfo->flags & SURF_PHONG) && !VectorCompare(vert->normal, vec3_origin))
normal = vert->normal;
else
normal = surf->normal;
memcpy(&mod->normals[(*count) * 3], normal, sizeof(vec3_t));
// tangent vectors
vec4_t tangent;
vec3_t bitangent;
TangentVectors(normal, sdir, tdir, tangent, bitangent);
memcpy(&mod->tangents[(*count) * 4], tangent, sizeof(vec4_t));
(*count)++;
}
}