static int heightmap_build(void *ptr, ilG_context *context)
{
ilG_heightmap *self = ptr;
self->context = context;
ilG_tex_build(&self->height, context);
ilG_tex_build(&self->normal, context);
ilG_tex_build(&self->color, context);
if (ilG_material_link(self->shader, context)) {
return 0;
}
self->drawable = ilG_mesh(self->mesh, context);
ilA_mesh_free(self->mesh);
return self->complete = 1;
}
bool ilG_heightmap_build(ilG_heightmap *hm, ilG_renderman *rm, unsigned w, unsigned h,
ilG_tex height, ilG_tex normal, ilG_tex color, char **error)
{
memset(hm, 0, sizeof(*hm));
hm->rm = rm;
ilA_mesh *mesh = ilA_mesh_new(ILA_MESH_POSITION|ILA_MESH_TEXCOORD, w * h * 6);
unsigned x, y, i = 0, j;
mesh->mode = ILA_MESH_TRIANGLES;
for (y = 1; y < h; y++) {
for (x = 1; x < w; x++) {
float pos[] = {
x, y, 0, 1,
x, y-1,0, 1,
x-1,y, 0, 1,
x, y-1,0, 1,
x-1,y-1,0, 1,
x-1,y, 0, 1,
};
for (j = 0; j < 24; j += 4) {
pos[j] /= w;
}
for (j = 1; j < 24; j += 4) {
pos[j] /= h;
}
memcpy(mesh->position + i, pos, sizeof(pos));
float tex[] = {
x, y, 0, 0,
x, y, 0, 0,
x, y, 0, 0,
x, y, 0, 0,
x, y, 0, 0,
x, y, 0, 0,
};
memcpy(mesh->texcoord + i, tex, sizeof(tex));
i += 6;
}
}
hm->w = w;
hm->h = h;
hm->height = height;
hm->normal = normal;
hm->color = color;
ilG_material mat;
ilG_material_init(&mat);
ilG_material_name(&mat, "Heightmap Shader");
ilG_material_arrayAttrib(&mat, ILG_MESH_POS, "in_Position");
ilG_material_arrayAttrib(&mat, ILG_MESH_TEX, "in_Texcoord");
ilG_material_textureUnit(&mat, TEX_HEIGHT, "height_tex");
ilG_material_textureUnit(&mat, TEX_NORMAL, "normal_tex");
ilG_material_textureUnit(&mat, TEX_COLOR, "ambient_tex");
ilG_material_fragData(&mat, ILG_GBUFFER_NORMAL, "out_Normal");
ilG_material_fragData(&mat, ILG_GBUFFER_ALBEDO, "out_Albedo");
if (!ilG_renderman_addMaterialFromFile(hm->rm, mat, "heightmap.vert", "heightmap.frag", &hm->mat, error)) {
return false;
}
ilG_material *mat2 = ilG_renderman_findMaterial(rm, hm->mat);
hm->mvp = ilG_material_getLoc(mat2, "mvp");
hm->imt = ilG_material_getLoc(mat2, "imt");
hm->size = ilG_material_getLoc(mat2, "size");
if (!ilG_mesh_init(&hm->mesh, mesh)) {
ilA_mesh_free(mesh);
return false;
}
ilA_mesh_free(mesh);
return true;
}