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improve 3d renderer

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This commit is contained in:
asrael 2025-11-19 22:18:08 -06:00
parent f19b06d705
commit 59be43d80e
17 changed files with 556 additions and 486 deletions
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80
src/pxl8_bsp.c
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@ -55,6 +55,44 @@ static bool validate_chunk(const pxl8_bsp_chunk* chunk, u32 element_size, size_t
return true;
}
static inline bool pxl8_bsp_get_edge_vertex(const pxl8_bsp* bsp, i32 surfedge_idx, u32* out_vert_idx) {
if (surfedge_idx >= (i32)bsp->num_surfedges) return false;
i32 edge_idx = bsp->surfedges[surfedge_idx];
u32 vertex_index;
if (edge_idx >= 0) {
if ((u32)edge_idx >= bsp->num_edges) return false;
vertex_index = 0;
} else {
edge_idx = -edge_idx;
if ((u32)edge_idx >= bsp->num_edges) return false;
vertex_index = 1;
}
*out_vert_idx = bsp->edges[edge_idx].vertex[vertex_index];
return *out_vert_idx < bsp->num_vertices;
}
static inline bool pxl8_bsp_get_edge_vertices(const pxl8_bsp* bsp, i32 surfedge_idx, u32* out_v0_idx, u32* out_v1_idx) {
if (surfedge_idx >= (i32)bsp->num_surfedges) return false;
i32 edge_idx = bsp->surfedges[surfedge_idx];
if (edge_idx >= 0) {
if ((u32)edge_idx >= bsp->num_edges) return false;
*out_v0_idx = bsp->edges[edge_idx].vertex[0];
*out_v1_idx = bsp->edges[edge_idx].vertex[1];
} else {
edge_idx = -edge_idx;
if ((u32)edge_idx >= bsp->num_edges) return false;
*out_v0_idx = bsp->edges[edge_idx].vertex[1];
*out_v1_idx = bsp->edges[edge_idx].vertex[0];
}
return *out_v0_idx < bsp->num_vertices && *out_v1_idx < bsp->num_vertices;
}
pxl8_result pxl8_bsp_load(const char* path, pxl8_bsp* bsp) {
if (!path || !bsp) return PXL8_ERROR_INVALID_ARGUMENT;
@ -280,21 +318,9 @@ pxl8_result pxl8_bsp_load(const char* path, pxl8_bsp* bsp) {
for (u32 j = 0; j < face->num_edges; j++) {
i32 surfedge_idx = face->first_edge + j;
if (surfedge_idx >= (i32)bsp->num_surfedges) continue;
i32 edge_idx = bsp->surfedges[surfedge_idx];
u32 vert_idx;
if (edge_idx >= 0) {
if ((u32)edge_idx >= bsp->num_edges) continue;
vert_idx = bsp->edges[edge_idx].vertex[0];
} else {
edge_idx = -edge_idx;
if ((u32)edge_idx >= bsp->num_edges) continue;
vert_idx = bsp->edges[edge_idx].vertex[1];
}
if (vert_idx >= bsp->num_vertices) continue;
if (!pxl8_bsp_get_edge_vertex(bsp, surfedge_idx, &vert_idx)) continue;
pxl8_vec3 v = bsp->vertices[vert_idx].position;
@ -392,21 +418,10 @@ void pxl8_bsp_render_face(pxl8_gfx* gfx, const pxl8_bsp* bsp, u32 face_id, u32 t
for (u32 i = 0; i < face->num_edges && num_verts < 64; i++) {
i32 surfedge_idx = face->first_edge + i;
if (surfedge_idx >= (i32)bsp->num_surfedges) continue;
i32 edge_idx = bsp->surfedges[surfedge_idx];
u32 vert_idx;
if (edge_idx >= 0) {
if ((u32)edge_idx >= bsp->num_edges) continue;
vert_idx = bsp->edges[edge_idx].vertex[0];
} else {
edge_idx = -edge_idx;
if ((u32)edge_idx >= bsp->num_edges) continue;
vert_idx = bsp->edges[edge_idx].vertex[1];
}
if (!pxl8_bsp_get_edge_vertex(bsp, surfedge_idx, &vert_idx)) continue;
if (vert_idx >= bsp->num_vertices) continue;
verts[num_verts++] = bsp->vertices[vert_idx].position;
}
@ -494,6 +509,7 @@ void pxl8_bsp_render_textured(
pxl8_bsp_render_face(gfx, bsp, face_id, texture_id);
}
}
}
void pxl8_bsp_render_wireframe(
@ -532,21 +548,9 @@ void pxl8_bsp_render_wireframe(
if (surfedge_idx >= (i32)bsp->num_surfedges ||
next_surfedge_idx >= (i32)bsp->num_surfedges) continue;
i32 edge_idx = bsp->surfedges[surfedge_idx];
u32 v0_idx, v1_idx;
if (edge_idx >= 0) {
if ((u32)edge_idx >= bsp->num_edges) continue;
v0_idx = bsp->edges[edge_idx].vertex[0];
v1_idx = bsp->edges[edge_idx].vertex[1];
} else {
edge_idx = -edge_idx;
if ((u32)edge_idx >= bsp->num_edges) continue;
v0_idx = bsp->edges[edge_idx].vertex[1];
v1_idx = bsp->edges[edge_idx].vertex[0];
}
if (v0_idx >= bsp->num_vertices || v1_idx >= bsp->num_vertices) continue;
if (!pxl8_bsp_get_edge_vertices(bsp, surfedge_idx, &v0_idx, &v1_idx)) continue;
pxl8_vec3 p0 = bsp->vertices[v0_idx].position;
pxl8_vec3 p1 = bsp->vertices[v1_idx].position;