static void _BezierPatchLowQuality(u8 *&dest, u16 *&indices, int &count, int tess_u, int tess_v, const BezierPatch &patch, u32 origVertType) {
const float third = 1.0f / 3.0f;
// Fast and easy way - just draw the control points, generate some very basic normal vector subsitutes.
// Very inaccurate though but okay for Loco Roco. Maybe should keep it as an option.
float u_base = patch.u_index / 3.0f;
float v_base = patch.v_index / 3.0f;
GEPatchPrimType prim_type = patch.primType;
for (int tile_v = 0; tile_v < 3; tile_v++) {
for (int tile_u = 0; tile_u < 3; tile_u++) {
int point_index = tile_u + tile_v * 4;
SimpleVertex v0 = *patch.points[point_index];
SimpleVertex v1 = *patch.points[point_index + 1];
SimpleVertex v2 = *patch.points[point_index + 4];
SimpleVertex v3 = *patch.points[point_index + 5];
// Generate UV. TODO: Do this even if UV specified in control points?
if ((origVertType & GE_VTYPE_TC_MASK) == 0) {
float u = u_base + tile_u * third;
float v = v_base + tile_v * third;
v0.uv[0] = u;
v0.uv[1] = v;
v1.uv[0] = u + third;
v1.uv[1] = v;
v2.uv[0] = u;
v2.uv[1] = v + third;
v3.uv[0] = u + third;
v3.uv[1] = v + third;
}
// Generate normal if lighting is enabled (otherwise there's no point).
// This is a really poor quality algorithm, we get facet normals.
if (patch.computeNormals) {
Vec3Packedf norm = Cross(v1.pos - v0.pos, v2.pos - v0.pos);
norm.Normalize();
if (patch.patchFacing)
norm *= -1.0f;
v0.nrm = norm;
v1.nrm = norm;
v2.nrm = norm;
v3.nrm = norm;
}
int total = patch.index * 3 * 3 * 4; // A patch has 3x3 tiles, and each tiles have 4 vertices.
int tile_index = tile_u + tile_v * 3;
int idx0 = total + tile_index * 4 + 0;
int idx1 = total + tile_index * 4 + 1;
int idx2 = total + tile_index * 4 + 2;
int idx3 = total + tile_index * 4 + 3;
CopyQuad(dest, &v0, &v1, &v2, &v3);
CopyQuadIndex(indices, prim_type, idx0, idx1, idx2, idx3);
count += 6;
}
}
}
void _SplinePatchLowQuality(u8 *&dest, int &count, const SplinePatchLocal &spatch, u32 origVertType) {
const float third = 1.0f / 3.0f;
// Fast and easy way - just draw the control points, generate some very basic normal vector substitutes.
// Very inaccurate but okay for Loco Roco. Maybe should keep it as an option because it's fast.
const int tile_min_u = (spatch.type_u & START_OPEN) ? 0 : 1;
const int tile_min_v = (spatch.type_v & START_OPEN) ? 0 : 1;
const int tile_max_u = (spatch.type_u & END_OPEN) ? spatch.count_u - 1 : spatch.count_u - 2;
const int tile_max_v = (spatch.type_v & END_OPEN) ? spatch.count_v - 1 : spatch.count_v - 2;
for (int tile_v = tile_min_v; tile_v < tile_max_v; ++tile_v) {
for (int tile_u = tile_min_u; tile_u < tile_max_u; ++tile_u) {
int point_index = tile_u + tile_v * spatch.count_u;
SimpleVertex v0 = *spatch.points[point_index];
SimpleVertex v1 = *spatch.points[point_index + 1];
SimpleVertex v2 = *spatch.points[point_index + spatch.count_u];
SimpleVertex v3 = *spatch.points[point_index + spatch.count_u + 1];
// Generate UV. TODO: Do this even if UV specified in control points?
if ((origVertType & GE_VTYPE_TC_MASK) == 0) {
float u = tile_u * third;
float v = tile_v * third;
v0.uv[0] = u;
v0.uv[1] = v;
v1.uv[0] = u + third;
v1.uv[1] = v;
v2.uv[0] = u;
v2.uv[1] = v + third;
v3.uv[0] = u + third;
v3.uv[1] = v + third;
}
// Generate normal if lighting is enabled (otherwise there's no point).
// This is a really poor quality algorithm, we get facet normals.
if (gstate.isLightingEnabled()) {
Vec3Packedf norm = Cross(v1.pos - v0.pos, v2.pos - v0.pos);
norm.Normalize();
if (gstate.patchfacing & 1)
norm *= -1.0f;
v0.nrm = norm;
v1.nrm = norm;
v2.nrm = norm;
v3.nrm = norm;
}
CopyQuad(dest, &v0, &v1, &v2, &v3);
count += 6;
}
}
}
void _BezierPatchLowQuality(u8 *&dest, int &count, int tess_u, int tess_v, const BezierPatch &patch, u32 origVertType) {
const float third = 1.0f / 3.0f;
// Fast and easy way - just draw the control points, generate some very basic normal vector subsitutes.
// Very inaccurate though but okay for Loco Roco. Maybe should keep it as an option.
float u_base = patch.u_index / 3.0f;
float v_base = patch.v_index / 3.0f;
for (int tile_v = 0; tile_v < 3; tile_v++) {
for (int tile_u = 0; tile_u < 3; tile_u++) {
int point_index = tile_u + tile_v * 4;
SimpleVertex v0 = *patch.points[point_index];
SimpleVertex v1 = *patch.points[point_index + 1];
SimpleVertex v2 = *patch.points[point_index + 4];
SimpleVertex v3 = *patch.points[point_index + 5];
// Generate UV. TODO: Do this even if UV specified in control points?
if ((origVertType & GE_VTYPE_TC_MASK) == 0) {
float u = u_base + tile_u * third;
float v = v_base + tile_v * third;
v0.uv[0] = u;
v0.uv[1] = v;
v1.uv[0] = u + third;
v1.uv[1] = v;
v2.uv[0] = u;
v2.uv[1] = v + third;
v3.uv[0] = u + third;
v3.uv[1] = v + third;
}
// Generate normal if lighting is enabled (otherwise there's no point).
// This is a really poor quality algorithm, we get facet normals.
if (gstate.isLightingEnabled()) {
Vec3Packedf norm = Cross(v1.pos - v0.pos, v2.pos - v0.pos);
norm.Normalize();
if (gstate.patchfacing & 1)
norm *= -1.0f;
v0.nrm = norm;
v1.nrm = norm;
v2.nrm = norm;
v3.nrm = norm;
}
CopyQuad(dest, &v0, &v1, &v2, &v3);
count += 6;
}
}
}
static void _SplinePatchLowQuality(u8 *&dest, u16 *indices, int &count, const SplinePatchLocal &spatch, u32 origVertType) {
// Fast and easy way - just draw the control points, generate some very basic normal vector substitutes.
// Very inaccurate but okay for Loco Roco. Maybe should keep it as an option because it's fast.
const int tile_min_u = (spatch.type_u & START_OPEN) ? 0 : 1;
const int tile_min_v = (spatch.type_v & START_OPEN) ? 0 : 1;
const int tile_max_u = (spatch.type_u & END_OPEN) ? spatch.count_u - 1 : spatch.count_u - 2;
const int tile_max_v = (spatch.type_v & END_OPEN) ? spatch.count_v - 1 : spatch.count_v - 2;
float tu_width = (float)spatch.count_u - 3.0f;
float tv_height = (float)spatch.count_v - 3.0f;
tu_width /= (float)(tile_max_u - tile_min_u);
tv_height /= (float)(tile_max_v - tile_min_v);
GEPatchPrimType prim_type = spatch.primType;
bool computeNormals = spatch.computeNormals;
bool patchFacing = spatch.patchFacing;
int i = 0;
for (int tile_v = tile_min_v; tile_v < tile_max_v; ++tile_v) {
for (int tile_u = tile_min_u; tile_u < tile_max_u; ++tile_u) {
int point_index = tile_u + tile_v * spatch.count_u;
SimpleVertex v0 = *spatch.points[point_index];
SimpleVertex v1 = *spatch.points[point_index + 1];
SimpleVertex v2 = *spatch.points[point_index + spatch.count_u];
SimpleVertex v3 = *spatch.points[point_index + spatch.count_u + 1];
// Generate UV. TODO: Do this even if UV specified in control points?
if ((origVertType & GE_VTYPE_TC_MASK) == 0) {
float u = (tile_u - tile_min_u) * tu_width;
float v = (tile_v - tile_min_v) * tv_height;
v0.uv[0] = u;
v0.uv[1] = v;
v1.uv[0] = u + tu_width;
v1.uv[1] = v;
v2.uv[0] = u;
v2.uv[1] = v + tv_height;
v3.uv[0] = u + tu_width;
v3.uv[1] = v + tv_height;
}
// Generate normal if lighting is enabled (otherwise there's no point).
// This is a really poor quality algorithm, we get facet normals.
if (computeNormals) {
Vec3Packedf norm = Cross(v1.pos - v0.pos, v2.pos - v0.pos);
norm.Normalize();
if (patchFacing)
norm *= -1.0f;
v0.nrm = norm;
v1.nrm = norm;
v2.nrm = norm;
v3.nrm = norm;
}
int idx0 = i * 4 + 0;
int idx1 = i * 4 + 1;
int idx2 = i * 4 + 2;
int idx3 = i * 4 + 3;
i++;
CopyQuad(dest, &v0, &v1, &v2, &v3);
CopyQuadIndex(indices, prim_type, idx0, idx1, idx2, idx3);
count += 6;
}
}
}