refactor separate framework from game code, add demo3d
This commit is contained in:
parent
19ae869769
commit
40f5cdcaa5
92 changed files with 2665 additions and 6547 deletions
594
demo3d/client/bsp/demo3d_bsp.c
Normal file
594
demo3d/client/bsp/demo3d_bsp.c
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@ -0,0 +1,594 @@
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#include "demo3d_bsp.h"
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#include <string.h>
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#include "pxl8_color.h"
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#include "pxl8_io.h"
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#include "pxl8_log.h"
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#include "pxl8_mem.h"
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#define BSP_VERSION 29
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typedef enum {
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CHUNK_ENTITIES = 0,
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CHUNK_PLANES = 1,
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CHUNK_TEXTURES = 2,
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CHUNK_VERTICES = 3,
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CHUNK_VISIBILITY = 4,
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CHUNK_NODES = 5,
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CHUNK_TEXINFO = 6,
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CHUNK_FACES = 7,
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CHUNK_LIGHTING = 8,
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CHUNK_CLIPNODES = 9,
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CHUNK_LEAFS = 10,
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CHUNK_MARKSURFACES = 11,
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CHUNK_EDGES = 12,
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CHUNK_SURFEDGES = 13,
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CHUNK_MODELS = 14,
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CHUNK_COUNT = 15
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} demo3d_bsp_chunk_type;
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typedef struct {
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u32 offset;
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u32 size;
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} demo3d_bsp_chunk;
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typedef struct {
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u32 version;
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demo3d_bsp_chunk chunks[CHUNK_COUNT];
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} demo3d_bsp_header;
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static inline pxl8_vec3 read_vec3(pxl8_stream* stream) {
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f32 x = pxl8_read_f32(stream);
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f32 y = pxl8_read_f32(stream);
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f32 z = pxl8_read_f32(stream);
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return (pxl8_vec3){x, z, y};
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}
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static bool validate_chunk(const demo3d_bsp_chunk* chunk, u32 element_size, usize file_size) {
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if (chunk->size == 0) return true;
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if (chunk->offset >= file_size) return false;
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if (chunk->offset + chunk->size > file_size) return false;
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if (chunk->size % element_size != 0) return false;
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return true;
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}
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static inline bool demo3d_bsp_get_edge_vertex(const demo3d_bsp* bsp, i32 surfedge_idx, u32* out_vert_idx) {
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if (surfedge_idx >= (i32)bsp->num_surfedges) return false;
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i32 edge_idx = bsp->surfedges[surfedge_idx];
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u32 vertex_index;
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if (edge_idx >= 0) {
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if ((u32)edge_idx >= bsp->num_edges) return false;
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vertex_index = 0;
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} else {
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edge_idx = -edge_idx;
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if ((u32)edge_idx >= bsp->num_edges) return false;
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vertex_index = 1;
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}
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*out_vert_idx = bsp->edges[edge_idx].vertex[vertex_index];
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return *out_vert_idx < bsp->num_vertices;
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}
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pxl8_result demo3d_bsp_load(const char* path, demo3d_bsp* bsp) {
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if (!path || !bsp) return PXL8_ERROR_INVALID_ARGUMENT;
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memset(bsp, 0, sizeof(*bsp));
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u8* file_data = NULL;
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usize file_size = 0;
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pxl8_result result = pxl8_io_read_binary_file(path, &file_data, &file_size);
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if (result != PXL8_OK) {
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pxl8_error("Failed to load BSP file: %s", path);
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return result;
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}
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if (file_size < sizeof(demo3d_bsp_header)) {
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pxl8_error("BSP file too small: %s", path);
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pxl8_free(file_data);
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return PXL8_ERROR_INVALID_FORMAT;
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}
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pxl8_stream stream = pxl8_stream_create(file_data, (u32)file_size);
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demo3d_bsp_header header;
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header.version = pxl8_read_u32(&stream);
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if (header.version != BSP_VERSION) {
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pxl8_error("Invalid BSP version: %u (expected %d)", header.version, BSP_VERSION);
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pxl8_free(file_data);
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return PXL8_ERROR_INVALID_FORMAT;
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}
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for (i32 i = 0; i < CHUNK_COUNT; i++) {
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header.chunks[i].offset = pxl8_read_u32(&stream);
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header.chunks[i].size = pxl8_read_u32(&stream);
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}
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demo3d_bsp_chunk* chunk = &header.chunks[CHUNK_VERTICES];
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if (!validate_chunk(chunk, 12, file_size)) goto error_cleanup;
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bsp->num_vertices = chunk->size / 12;
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if (bsp->num_vertices > 0) {
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bsp->vertices = pxl8_calloc(bsp->num_vertices, sizeof(demo3d_bsp_vertex));
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if (!bsp->vertices) goto error_cleanup;
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_vertices; i++) {
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bsp->vertices[i].position = read_vec3(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_EDGES];
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if (!validate_chunk(chunk, 4, file_size)) goto error_cleanup;
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bsp->num_edges = chunk->size / 4;
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if (bsp->num_edges > 0) {
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bsp->edges = pxl8_calloc(bsp->num_edges, sizeof(demo3d_bsp_edge));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_edges; i++) {
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bsp->edges[i].vertex[0] = pxl8_read_u16(&stream);
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bsp->edges[i].vertex[1] = pxl8_read_u16(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_SURFEDGES];
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if (!validate_chunk(chunk, 4, file_size)) goto error_cleanup;
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bsp->num_surfedges = chunk->size / 4;
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if (bsp->num_surfedges > 0) {
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bsp->surfedges = pxl8_calloc(bsp->num_surfedges, sizeof(i32));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_surfedges; i++) {
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bsp->surfedges[i] = pxl8_read_i32(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_PLANES];
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if (!validate_chunk(chunk, 20, file_size)) goto error_cleanup;
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bsp->num_planes = chunk->size / 20;
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if (bsp->num_planes > 0) {
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bsp->planes = pxl8_calloc(bsp->num_planes, sizeof(demo3d_bsp_plane));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_planes; i++) {
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bsp->planes[i].normal = read_vec3(&stream);
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bsp->planes[i].dist = pxl8_read_f32(&stream);
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bsp->planes[i].type = pxl8_read_i32(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_FACES];
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if (!validate_chunk(chunk, 20, file_size)) goto error_cleanup;
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bsp->num_faces = chunk->size / 20;
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if (bsp->num_faces > 0) {
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bsp->faces = pxl8_calloc(bsp->num_faces, sizeof(demo3d_bsp_face));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_faces; i++) {
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bsp->faces[i].plane_id = pxl8_read_u16(&stream);
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bsp->faces[i].side = pxl8_read_u16(&stream);
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bsp->faces[i].first_edge = pxl8_read_u32(&stream);
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bsp->faces[i].num_edges = pxl8_read_u16(&stream);
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bsp->faces[i].material_id = pxl8_read_u16(&stream);
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bsp->faces[i].styles[0] = pxl8_read_u8(&stream);
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bsp->faces[i].styles[1] = pxl8_read_u8(&stream);
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bsp->faces[i].styles[2] = pxl8_read_u8(&stream);
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bsp->faces[i].styles[3] = pxl8_read_u8(&stream);
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bsp->faces[i].lightmap_offset = pxl8_read_u32(&stream);
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bsp->faces[i].aabb_min = (pxl8_vec3){1e30f, 1e30f, 1e30f};
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bsp->faces[i].aabb_max = (pxl8_vec3){-1e30f, -1e30f, -1e30f};
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}
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}
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chunk = &header.chunks[CHUNK_NODES];
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if (!validate_chunk(chunk, 24, file_size)) goto error_cleanup;
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bsp->num_nodes = chunk->size / 24;
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if (bsp->num_nodes > 0) {
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bsp->nodes = pxl8_calloc(bsp->num_nodes, sizeof(demo3d_bsp_node));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_nodes; i++) {
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bsp->nodes[i].plane_id = pxl8_read_u32(&stream);
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bsp->nodes[i].children[0] = pxl8_read_i16(&stream);
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bsp->nodes[i].children[1] = pxl8_read_i16(&stream);
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i16 nx = pxl8_read_i16(&stream);
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i16 ny = pxl8_read_i16(&stream);
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i16 nz = pxl8_read_i16(&stream);
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bsp->nodes[i].mins[0] = nx;
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bsp->nodes[i].mins[1] = nz;
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bsp->nodes[i].mins[2] = ny;
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i16 mx = pxl8_read_i16(&stream);
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i16 my = pxl8_read_i16(&stream);
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i16 mz = pxl8_read_i16(&stream);
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bsp->nodes[i].maxs[0] = mx;
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bsp->nodes[i].maxs[1] = mz;
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bsp->nodes[i].maxs[2] = my;
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bsp->nodes[i].first_face = pxl8_read_u16(&stream);
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bsp->nodes[i].num_faces = pxl8_read_u16(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_LEAFS];
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if (!validate_chunk(chunk, 28, file_size)) goto error_cleanup;
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bsp->num_leafs = chunk->size / 28;
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if (bsp->num_leafs > 0) {
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bsp->leafs = pxl8_calloc(bsp->num_leafs, sizeof(demo3d_bsp_leaf));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_leafs; i++) {
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bsp->leafs[i].contents = pxl8_read_i32(&stream);
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bsp->leafs[i].visofs = pxl8_read_i32(&stream);
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i16 nx = pxl8_read_i16(&stream);
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i16 ny = pxl8_read_i16(&stream);
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i16 nz = pxl8_read_i16(&stream);
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bsp->leafs[i].mins[0] = nx;
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bsp->leafs[i].mins[1] = nz;
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bsp->leafs[i].mins[2] = ny;
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i16 mx = pxl8_read_i16(&stream);
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i16 my = pxl8_read_i16(&stream);
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i16 mz = pxl8_read_i16(&stream);
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bsp->leafs[i].maxs[0] = mx;
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bsp->leafs[i].maxs[1] = mz;
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bsp->leafs[i].maxs[2] = my;
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bsp->leafs[i].first_marksurface = pxl8_read_u16(&stream);
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bsp->leafs[i].num_marksurfaces = pxl8_read_u16(&stream);
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for (u32 j = 0; j < 4; j++) bsp->leafs[i].ambient_level[j] = pxl8_read_u8(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_MARKSURFACES];
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if (!validate_chunk(chunk, 2, file_size)) goto error_cleanup;
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bsp->num_marksurfaces = chunk->size / 2;
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if (bsp->num_marksurfaces > 0) {
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bsp->marksurfaces = pxl8_calloc(bsp->num_marksurfaces, sizeof(u16));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_marksurfaces; i++) {
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bsp->marksurfaces[i] = pxl8_read_u16(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_MODELS];
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if (!validate_chunk(chunk, 64, file_size)) goto error_cleanup;
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bsp->num_models = chunk->size / 64;
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if (bsp->num_models > 0) {
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bsp->models = pxl8_calloc(bsp->num_models, sizeof(demo3d_bsp_model));
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pxl8_stream_seek(&stream, chunk->offset);
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for (u32 i = 0; i < bsp->num_models; i++) {
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f32 minx = pxl8_read_f32(&stream);
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f32 miny = pxl8_read_f32(&stream);
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f32 minz = pxl8_read_f32(&stream);
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bsp->models[i].mins[0] = minx;
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bsp->models[i].mins[1] = minz;
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bsp->models[i].mins[2] = miny;
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f32 maxx = pxl8_read_f32(&stream);
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f32 maxy = pxl8_read_f32(&stream);
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f32 maxz = pxl8_read_f32(&stream);
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bsp->models[i].maxs[0] = maxx;
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bsp->models[i].maxs[1] = maxz;
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bsp->models[i].maxs[2] = maxy;
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bsp->models[i].origin = read_vec3(&stream);
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for (u32 j = 0; j < 4; j++) bsp->models[i].headnode[j] = pxl8_read_i32(&stream);
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bsp->models[i].visleafs = pxl8_read_i32(&stream);
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bsp->models[i].first_face = pxl8_read_i32(&stream);
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bsp->models[i].num_faces = pxl8_read_i32(&stream);
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}
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}
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chunk = &header.chunks[CHUNK_VISIBILITY];
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if (!validate_chunk(chunk, 1, file_size)) goto error_cleanup;
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bsp->visdata_size = chunk->size;
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if (bsp->visdata_size > 0) {
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bsp->visdata = pxl8_malloc(bsp->visdata_size);
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memcpy(bsp->visdata, file_data + chunk->offset, bsp->visdata_size);
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}
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chunk = &header.chunks[CHUNK_LIGHTING];
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if (!validate_chunk(chunk, 1, file_size)) goto error_cleanup;
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bsp->lightdata_size = chunk->size;
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if (bsp->lightdata_size > 0) {
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bsp->lightdata = pxl8_malloc(bsp->lightdata_size);
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memcpy(bsp->lightdata, file_data + chunk->offset, bsp->lightdata_size);
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}
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pxl8_free(file_data);
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for (u32 i = 0; i < bsp->num_faces; i++) {
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demo3d_bsp_face* face = &bsp->faces[i];
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f32 min_x = 1e30f, min_y = 1e30f, min_z = 1e30f;
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f32 max_x = -1e30f, max_y = -1e30f, max_z = -1e30f;
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for (u32 j = 0; j < face->num_edges; j++) {
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i32 surfedge_idx = face->first_edge + j;
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u32 vert_idx;
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if (!demo3d_bsp_get_edge_vertex(bsp, surfedge_idx, &vert_idx)) continue;
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pxl8_vec3 v = bsp->vertices[vert_idx].position;
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if (v.x < min_x) min_x = v.x;
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if (v.x > max_x) max_x = v.x;
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if (v.y < min_y) min_y = v.y;
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if (v.y > max_y) max_y = v.y;
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if (v.z < min_z) min_z = v.z;
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if (v.z > max_z) max_z = v.z;
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}
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face->aabb_min = (pxl8_vec3){min_x, min_y, min_z};
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face->aabb_max = (pxl8_vec3){max_x, max_y, max_z};
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}
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pxl8_debug("Loaded BSP: %u verts, %u faces, %u nodes, %u leafs",
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bsp->num_vertices, bsp->num_faces, bsp->num_nodes, bsp->num_leafs);
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return PXL8_OK;
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error_cleanup:
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pxl8_error("BSP chunk validation failed: %s", path);
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pxl8_free(file_data);
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demo3d_bsp_destroy(bsp);
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return PXL8_ERROR_INVALID_FORMAT;
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}
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void demo3d_bsp_destroy(demo3d_bsp* bsp) {
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if (!bsp) return;
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pxl8_free(bsp->cell_portals);
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pxl8_free(bsp->edges);
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pxl8_free(bsp->faces);
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pxl8_free(bsp->leafs);
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pxl8_free(bsp->lightdata);
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pxl8_free(bsp->lightmaps);
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pxl8_free(bsp->marksurfaces);
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pxl8_free(bsp->models);
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pxl8_free(bsp->nodes);
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pxl8_free(bsp->planes);
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pxl8_free(bsp->surfedges);
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pxl8_free(bsp->vertex_lights);
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pxl8_free(bsp->vertices);
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pxl8_free(bsp->visdata);
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pxl8_free(bsp->heightfield);
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memset(bsp, 0, sizeof(*bsp));
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}
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i32 demo3d_bsp_find_leaf(const demo3d_bsp* bsp, pxl8_vec3 pos) {
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if (!bsp || bsp->num_nodes == 0) return -1;
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i32 node_id = 0;
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while (node_id >= 0) {
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const demo3d_bsp_node* node = &bsp->nodes[node_id];
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const demo3d_bsp_plane* plane = &bsp->planes[node->plane_id];
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f32 dist = pxl8_vec3_dot(pos, plane->normal) - plane->dist;
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node_id = node->children[dist < 0 ? 1 : 0];
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}
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return -(node_id + 1);
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}
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bool demo3d_bsp_is_leaf_visible(const demo3d_bsp* bsp, i32 leaf_from, i32 leaf_to) {
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if (!bsp || !bsp->visdata || bsp->visdata_size == 0) return true;
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if (leaf_from < 0 || leaf_to < 0) return true;
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if ((u32)leaf_from >= bsp->num_leafs || (u32)leaf_to >= bsp->num_leafs) return true;
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|
||||
i32 visofs = bsp->leafs[leaf_from].visofs;
|
||||
if (visofs < 0) return true;
|
||||
|
||||
u32 row_size = (bsp->num_leafs + 7) >> 3;
|
||||
u32 byte_idx = (u32)leaf_to >> 3;
|
||||
u32 bit_idx = (u32)leaf_to & 7;
|
||||
|
||||
u8* vis = bsp->visdata + visofs;
|
||||
u8* vis_end = bsp->visdata + bsp->visdata_size;
|
||||
u32 out = 0;
|
||||
|
||||
while (out < row_size && vis < vis_end) {
|
||||
if (*vis) {
|
||||
if (out == byte_idx) {
|
||||
return (*vis & (1 << bit_idx)) != 0;
|
||||
}
|
||||
out++;
|
||||
vis++;
|
||||
} else {
|
||||
vis++;
|
||||
if (vis >= vis_end) break;
|
||||
u32 count = *vis++;
|
||||
if (out + count > byte_idx && byte_idx >= out) {
|
||||
return false;
|
||||
}
|
||||
out += count;
|
||||
}
|
||||
}
|
||||
|
||||
return out > byte_idx ? false : true;
|
||||
}
|
||||
|
||||
demo3d_bsp_pvs demo3d_bsp_decompress_pvs(const demo3d_bsp* bsp, i32 leaf) {
|
||||
demo3d_bsp_pvs pvs = {0};
|
||||
|
||||
u32 row = (bsp->num_leafs + 7) >> 3;
|
||||
pvs.data = pxl8_malloc(row);
|
||||
pvs.size = row;
|
||||
|
||||
if (!pvs.data) return pvs;
|
||||
|
||||
if (!bsp || leaf < 0 || (u32)leaf >= bsp->num_leafs) {
|
||||
memset(pvs.data, 0xFF, row);
|
||||
return pvs;
|
||||
}
|
||||
|
||||
i32 visofs = bsp->leafs[leaf].visofs;
|
||||
if (visofs < 0 || !bsp->visdata || bsp->visdata_size == 0) {
|
||||
memset(pvs.data, 0xFF, row);
|
||||
return pvs;
|
||||
}
|
||||
|
||||
u8* in = bsp->visdata + visofs;
|
||||
u8* out = pvs.data;
|
||||
u8* out_end = pvs.data + row;
|
||||
|
||||
do {
|
||||
if (*in) {
|
||||
*out++ = *in++;
|
||||
} else {
|
||||
in++;
|
||||
i32 c = *in++;
|
||||
while (c > 0 && out < out_end) {
|
||||
*out++ = 0;
|
||||
c--;
|
||||
}
|
||||
}
|
||||
} while (out < out_end);
|
||||
|
||||
return pvs;
|
||||
}
|
||||
|
||||
void demo3d_bsp_pvs_destroy(demo3d_bsp_pvs* pvs) {
|
||||
if (pvs) {
|
||||
pxl8_free(pvs->data);
|
||||
pvs->data = NULL;
|
||||
pvs->size = 0;
|
||||
}
|
||||
}
|
||||
|
||||
bool demo3d_bsp_pvs_is_visible(const demo3d_bsp_pvs* pvs, i32 leaf) {
|
||||
if (!pvs || !pvs->data || leaf < 0) return true;
|
||||
u32 byte_idx = (u32)leaf >> 3;
|
||||
u32 bit_idx = (u32)leaf & 7;
|
||||
if (byte_idx >= pvs->size) return true;
|
||||
return (pvs->data[byte_idx] & (1 << bit_idx)) != 0;
|
||||
}
|
||||
|
||||
demo3d_bsp_lightmap demo3d_bsp_lightmap_uniform(u8 r, u8 g, u8 b) {
|
||||
return (demo3d_bsp_lightmap){
|
||||
.color = {r, g, b},
|
||||
.height = 0,
|
||||
.offset = 0,
|
||||
.width = 0,
|
||||
};
|
||||
}
|
||||
|
||||
demo3d_bsp_lightmap demo3d_bsp_lightmap_mapped(u8 width, u8 height, u32 offset) {
|
||||
return (demo3d_bsp_lightmap){
|
||||
.color = {0, 0, 0},
|
||||
.height = height,
|
||||
.offset = offset,
|
||||
.width = width,
|
||||
};
|
||||
}
|
||||
|
||||
u8 demo3d_bsp_light_at(const demo3d_bsp* bsp, f32 x, f32 y, f32 z, u8 ambient) {
|
||||
if (!bsp || !bsp->vertices || !bsp->vertex_lights) return 255;
|
||||
|
||||
f32 best_dist = FLT_MAX;
|
||||
u32 best_idx = 0;
|
||||
|
||||
for (u32 i = 0; i < bsp->num_vertices; i++) {
|
||||
f32 dx = bsp->vertices[i].position.x - x;
|
||||
f32 dy = bsp->vertices[i].position.y - y;
|
||||
f32 dz = bsp->vertices[i].position.z - z;
|
||||
f32 dist = dx * dx + dy * dy + dz * dz;
|
||||
if (dist < best_dist) {
|
||||
best_dist = dist;
|
||||
best_idx = i;
|
||||
}
|
||||
}
|
||||
|
||||
if (best_idx >= bsp->num_vertex_lights) return 255;
|
||||
|
||||
u32 packed = bsp->vertex_lights[best_idx];
|
||||
u8 direct = (packed >> 24) & 0xFF;
|
||||
u8 ao = (packed >> 16) & 0xFF;
|
||||
f32 combined = (f32)direct + ((f32)ambient / 255.0f) * (f32)ao;
|
||||
return (u8)(combined > 255.0f ? 255.0f : combined);
|
||||
}
|
||||
|
||||
demo3d_bsp_lightmap_sample demo3d_bsp_sample_lightmap(const demo3d_bsp* bsp, u32 face_idx, f32 u, f32 v) {
|
||||
demo3d_bsp_lightmap_sample white = {255, 255, 255};
|
||||
|
||||
if (!bsp || !bsp->lightmaps || face_idx >= bsp->num_lightmaps) {
|
||||
return white;
|
||||
}
|
||||
|
||||
const demo3d_bsp_lightmap* lm = &bsp->lightmaps[face_idx];
|
||||
|
||||
if (lm->width == 0) {
|
||||
return (demo3d_bsp_lightmap_sample){lm->color[2], lm->color[1], lm->color[0]};
|
||||
}
|
||||
|
||||
if (!bsp->lightdata || bsp->lightdata_size == 0) {
|
||||
return white;
|
||||
}
|
||||
|
||||
f32 w = (f32)lm->width;
|
||||
f32 h = (f32)lm->height;
|
||||
f32 fx = u * w;
|
||||
f32 fy = v * h;
|
||||
|
||||
if (fx < 0) fx = 0;
|
||||
if (fx > w - 1.001f) fx = w - 1.001f;
|
||||
if (fy < 0) fy = 0;
|
||||
if (fy > h - 1.001f) fy = h - 1.001f;
|
||||
|
||||
u32 x0 = (u32)fx;
|
||||
u32 y0 = (u32)fy;
|
||||
u32 x1 = x0 + 1;
|
||||
u32 y1 = y0 + 1;
|
||||
if (x1 >= lm->width) x1 = lm->width - 1;
|
||||
if (y1 >= lm->height) y1 = lm->height - 1;
|
||||
|
||||
f32 frac_x = fx - (f32)x0;
|
||||
f32 frac_y = fy - (f32)y0;
|
||||
|
||||
u32 stride = lm->width;
|
||||
u32 base = lm->offset;
|
||||
|
||||
u32 idx00 = base + y0 * stride + x0;
|
||||
u32 idx10 = base + y0 * stride + x1;
|
||||
u32 idx01 = base + y1 * stride + x0;
|
||||
u32 idx11 = base + y1 * stride + x1;
|
||||
|
||||
u8 r00, g00, b00, r10, g10, b10, r01, g01, b01, r11, g11, b11;
|
||||
|
||||
if (idx00 < bsp->lightdata_size) pxl8_rgb332_unpack(bsp->lightdata[idx00], &r00, &g00, &b00);
|
||||
else { r00 = g00 = b00 = 255; }
|
||||
if (idx10 < bsp->lightdata_size) pxl8_rgb332_unpack(bsp->lightdata[idx10], &r10, &g10, &b10);
|
||||
else { r10 = g10 = b10 = 255; }
|
||||
if (idx01 < bsp->lightdata_size) pxl8_rgb332_unpack(bsp->lightdata[idx01], &r01, &g01, &b01);
|
||||
else { r01 = g01 = b01 = 255; }
|
||||
if (idx11 < bsp->lightdata_size) pxl8_rgb332_unpack(bsp->lightdata[idx11], &r11, &g11, &b11);
|
||||
else { r11 = g11 = b11 = 255; }
|
||||
|
||||
f32 inv_x = 1.0f - frac_x;
|
||||
f32 inv_y = 1.0f - frac_y;
|
||||
|
||||
u8 r = (u8)(r00 * inv_x * inv_y + r10 * frac_x * inv_y + r01 * inv_x * frac_y + r11 * frac_x * frac_y);
|
||||
u8 g = (u8)(g00 * inv_x * inv_y + g10 * frac_x * inv_y + g01 * inv_x * frac_y + g11 * frac_x * frac_y);
|
||||
u8 b = (u8)(b00 * inv_x * inv_y + b10 * frac_x * inv_y + b01 * inv_x * frac_y + b11 * frac_x * frac_y);
|
||||
|
||||
return (demo3d_bsp_lightmap_sample){b, g, r};
|
||||
}
|
||||
|
||||
u32 demo3d_bsp_face_count(const demo3d_bsp* bsp) {
|
||||
if (!bsp) return 0;
|
||||
return bsp->num_faces;
|
||||
}
|
||||
|
||||
pxl8_vec3 demo3d_bsp_face_normal(const demo3d_bsp* bsp, u32 face_id) {
|
||||
pxl8_vec3 up = {0, 1, 0};
|
||||
if (!bsp || face_id >= bsp->num_faces) return up;
|
||||
|
||||
const demo3d_bsp_face* face = &bsp->faces[face_id];
|
||||
if (face->plane_id >= bsp->num_planes) return up;
|
||||
|
||||
pxl8_vec3 normal = bsp->planes[face->plane_id].normal;
|
||||
if (face->side) {
|
||||
normal.x = -normal.x;
|
||||
normal.y = -normal.y;
|
||||
normal.z = -normal.z;
|
||||
}
|
||||
return normal;
|
||||
}
|
||||
|
||||
void demo3d_bsp_face_set_material(demo3d_bsp* bsp, u32 face_id, u16 material_id) {
|
||||
if (!bsp || face_id >= bsp->num_faces) return;
|
||||
bsp->faces[face_id].material_id = material_id;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue