refactor separate framework from game code, add demo3d

demo3d/client/bsp/demo3d_bsp.h

@@ -0,0 +1,162 @@
+#pragma once
+
+#include "pxl8_math.h"
+#include "pxl8_types.h"
+
+typedef struct demo3d_bsp_edge {
+    u16 vertex[2];
+} demo3d_bsp_edge;
+
+typedef struct demo3d_bsp_face {
+    u32 first_edge;
+    u32 lightmap_offset;
+    u16 num_edges;
+    u16 plane_id;
+    u16 side;
+
+    u8 styles[4];
+    u16 material_id;
+
+    pxl8_vec3 aabb_min;
+    pxl8_vec3 aabb_max;
+} demo3d_bsp_face;
+
+typedef struct demo3d_bsp_leaf {
+    u8 ambient_level[4];
+    i32 contents;
+
+    u16 first_marksurface;
+    i16 maxs[3];
+    i16 mins[3];
+    u16 num_marksurfaces;
+
+    i32 visofs;
+} demo3d_bsp_leaf;
+
+typedef struct demo3d_bsp_model {
+    i32 first_face;
+    i32 headnode[4];
+    f32 maxs[3];
+    f32 mins[3];
+    i32 num_faces;
+
+    pxl8_vec3 origin;
+    i32 visleafs;
+} demo3d_bsp_model;
+
+typedef struct demo3d_bsp_node {
+    i32 children[2];
+
+    u16 first_face;
+    i16 maxs[3];
+    i16 mins[3];
+    u16 num_faces;
+
+    u32 plane_id;
+} demo3d_bsp_node;
+
+typedef struct demo3d_bsp_plane {
+    f32 dist;
+    pxl8_vec3 normal;
+    i32 type;
+} demo3d_bsp_plane;
+
+
+typedef struct demo3d_bsp_vertex {
+    pxl8_vec3 position;
+} demo3d_bsp_vertex;
+
+typedef struct demo3d_bsp_lightmap {
+    u8 color[3];
+    u8 height;
+    u32 offset;
+    u8 width;
+} demo3d_bsp_lightmap;
+
+typedef struct demo3d_bsp_lightmap_sample {
+    u8 b;
+    u8 g;
+    u8 r;
+} demo3d_bsp_lightmap_sample;
+
+typedef struct demo3d_bsp_pvs {
+    u8* data;
+    u32 size;
+} demo3d_bsp_pvs;
+
+typedef struct demo3d_bsp_portal {
+    f32 x0, z0;
+    f32 x1, z1;
+    u32 target_leaf;
+} demo3d_bsp_portal;
+
+typedef struct demo3d_bsp_cell_portals {
+    demo3d_bsp_portal portals[4];
+    u8 num_portals;
+} demo3d_bsp_cell_portals;
+
+typedef struct demo3d_bsp {
+    demo3d_bsp_cell_portals* cell_portals;
+    demo3d_bsp_edge* edges;
+    demo3d_bsp_face* faces;
+    demo3d_bsp_leaf* leafs;
+    u8* lightdata;
+    demo3d_bsp_lightmap* lightmaps;
+    u16* marksurfaces;
+    demo3d_bsp_model* models;
+    demo3d_bsp_node* nodes;
+    demo3d_bsp_plane* planes;
+    i32* surfedges;
+    u32* vertex_lights;
+    demo3d_bsp_vertex* vertices;
+    u8* visdata;
+    f32* heightfield;
+
+    u32 lightdata_size;
+    u32 num_cell_portals;
+    u32 num_edges;
+    u32 num_faces;
+    u32 num_leafs;
+    u32 num_lightmaps;
+    u32 num_marksurfaces;
+    u32 num_models;
+    u32 num_nodes;
+    u32 num_planes;
+    u32 num_surfedges;
+    u32 num_vertex_lights;
+    u32 num_vertices;
+    u32 num_heightfield;
+    f32 heightfield_ox;
+    f32 heightfield_oz;
+    f32 heightfield_cell_size;
+    u16 heightfield_w;
+    u16 heightfield_h;
+    u32 visdata_size;
+    f32 bounds_min_x;
+    f32 bounds_min_z;
+    f32 bounds_max_x;
+    f32 bounds_max_z;
+} demo3d_bsp;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+demo3d_bsp_pvs demo3d_bsp_decompress_pvs(const demo3d_bsp* bsp, i32 leaf);
+void demo3d_bsp_destroy(demo3d_bsp* bsp);
+u32 demo3d_bsp_face_count(const demo3d_bsp* bsp);
+pxl8_vec3 demo3d_bsp_face_normal(const demo3d_bsp* bsp, u32 face_id);
+void demo3d_bsp_face_set_material(demo3d_bsp* bsp, u32 face_id, u16 material_id);
+i32 demo3d_bsp_find_leaf(const demo3d_bsp* bsp, pxl8_vec3 pos);
+bool demo3d_bsp_is_leaf_visible(const demo3d_bsp* bsp, i32 leaf_from, i32 leaf_to);
+demo3d_bsp_lightmap demo3d_bsp_lightmap_mapped(u8 width, u8 height, u32 offset);
+demo3d_bsp_lightmap demo3d_bsp_lightmap_uniform(u8 r, u8 g, u8 b);
+pxl8_result demo3d_bsp_load(const char* path, demo3d_bsp* bsp);
+void demo3d_bsp_pvs_destroy(demo3d_bsp_pvs* pvs);
+bool demo3d_bsp_pvs_is_visible(const demo3d_bsp_pvs* pvs, i32 leaf);
+u8 demo3d_bsp_light_at(const demo3d_bsp* bsp, f32 x, f32 y, f32 z, u8 ambient);
+demo3d_bsp_lightmap_sample demo3d_bsp_sample_lightmap(const demo3d_bsp* bsp, u32 face_idx, f32 u, f32 v);
+
+#ifdef __cplusplus
+}
+#endif