2 * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
10 #define MDL_VERSION_NR 101
14 k_shader_standard
= 0,
15 k_shader_standard_cutout
= 1,
16 k_shader_terrain_blend
= 2,
17 k_shader_standard_vertex_blend
= 3,
19 k_shader_invisible
= 5,
25 k_surface_prop_concrete
= 0,
26 k_surface_prop_wood
= 1,
27 k_surface_prop_grass
= 2,
28 k_surface_prop_tiles
= 3,
29 k_surface_prop_metal
= 4
34 k_material_flag_skate_target
= 0x00000001,
35 k_material_flag_collision
= 0x00000002,
36 k_material_flag_grow_grass
= 0x00000004,
37 k_material_flag_grindable
= 0x00000008,
38 k_material_flag_invisible
= 0x00000010,
39 k_material_flag_boundary
= 0x00000020
51 u8 colour
[4]; /* 4*8 */
52 u16 weights
[4];/* 4*16 */
53 u8 groups
[4]; /* 4*8 */
58 typedef struct mdl_context mdl_context
;
59 typedef struct mdl_array_ptr mdl_array_ptr
;
60 typedef struct mdl_vert mdl_vert
;
61 typedef struct mdl_transform mdl_transform
;
62 typedef struct mdl_submesh mdl_submesh
;
63 typedef struct mdl_material mdl_material
;
64 typedef struct mdl_bone mdl_bone
;
65 typedef struct mdl_armature mdl_armature
;
66 typedef struct mdl_animation mdl_animation
;
67 typedef struct mdl_transform mdl_keyframe
;
68 typedef struct mdl_mesh mdl_mesh
;
69 typedef struct mdl_file mdl_file
;
70 typedef struct mdl_texture mdl_texture
;
71 typedef struct mdl_array mdl_array
;
72 typedef struct mdl_header mdl_header
;
80 static void transform_identity( mdl_transform
*transform
)
82 v3_zero( transform
->co
);
83 q_identity( transform
->q
);
84 v3_fill( transform
->s
, 1.0f
);
87 static void mdl_transform_vector( mdl_transform
*transform
, v3f vec
, v3f dest
)
89 v3_mul( transform
->s
, vec
, dest
);
90 q_mulv( transform
->q
, dest
, dest
);
93 static void mdl_transform_point( mdl_transform
*transform
, v3f co
, v3f dest
)
95 mdl_transform_vector( transform
, co
, dest
);
96 v3_add( transform
->co
, dest
, dest
);
99 static void mdl_transform_mul( mdl_transform
*a
, mdl_transform
*b
,
102 mdl_transform_point( a
, b
->co
, d
->co
);
103 q_mul( a
->q
, b
->q
, d
->q
);
105 v3_mul( a
->s
, b
->s
, d
->s
);
134 v3f conevx
, conevy
, coneva
;
140 k_bone_flag_deform
= 0x00000001,
141 k_bone_flag_ik
= 0x00000002,
142 k_bone_flag_cone_constraint
= 0x00000004
147 k_bone_collider_none
= 0,
148 k_bone_collider_box
= 1,
149 k_bone_collider_capsule
= 2
154 mdl_transform transform
;
177 u16 material_id
, flags
;
182 k_submesh_flag_none
= 0x0000,
183 k_submesh_flag_consumed
= 0x0001
188 mdl_transform transform
;
192 entity_id
, /* upper 16 bits: type, lower 16 bits: index */
246 /* animation buffers */
253 u32 pack_base_offset
;
260 VG_STATIC
void mdl_load_fatal_corrupt( mdl_context
*mdl
)
263 vg_file_print_invalid( mdl
->file
);
264 vg_fatal_error( "Corrupt model" );
268 * Model implementation
271 VG_STATIC u32
mdl_query_array_size( mdl_array
*arr
)
273 if( arr
->item_count
){
274 u32 size
= arr
->item_size
*arr
->item_count
;
275 return vg_align8(size
);
280 VG_STATIC
const char *mdl_pstr( mdl_context
*mdl
, u32 pstr
);
282 void mdl_fread_pack_file( mdl_context
*mdl
, mdl_file
*info
, void *dst
)
284 if( !info
->pack_size
){
285 vg_warn( "path: %s\n", mdl_pstr( mdl
, info
->pstr_path
) );
286 vg_fatal_error( "Packed file is only a header; it is not packed" );
289 fseek( mdl
->file
, mdl
->pack_base_offset
+info
->pack_offset
, SEEK_SET
);
290 u64 l
= fread( dst
, info
->pack_size
, 1, mdl
->file
);
292 if( l
!= 1 ) mdl_load_fatal_corrupt( mdl
);
295 /* TODO: Rename these */
296 VG_STATIC
void mdl_load_array_file_buffer( mdl_context
*mdl
, mdl_array
*arr
,
299 if( arr
->item_count
){
300 fseek( mdl
->file
, arr
->file_offset
, SEEK_SET
);
301 u64 l
= fread( buffer
, arr
->item_size
*arr
->item_count
, 1, mdl
->file
);
303 if( l
!= 1 ) mdl_load_fatal_corrupt( mdl
);
307 VG_STATIC
void mdl_load_array_file( mdl_context
*mdl
, mdl_array_ptr
*ptr
,
308 mdl_array
*arr
, void *lin_alloc
)
310 if( arr
->item_count
){
311 u32 size
= arr
->item_size
*arr
->item_count
;
312 ptr
->data
= vg_linear_alloc( lin_alloc
, vg_align8(size
) );
313 mdl_load_array_file_buffer( mdl
, arr
, ptr
->data
);
318 ptr
->count
= arr
->item_count
;
319 ptr
->stride
= arr
->item_size
;
322 VG_STATIC
void *mdl_arritm( mdl_array_ptr
*arr
, u32 index
)
324 return ((u8
*)arr
->data
) + index
*arr
->stride
;
327 VG_STATIC u32
mdl_arrcount( mdl_array_ptr
*arr
)
332 VG_STATIC mdl_array
*mdl_find_array( mdl_context
*mdl
, const char *name
)
334 for( u32 i
=0; i
<mdl_arrcount(&mdl
->index
); i
++ ){
335 mdl_array
*arr
= mdl_arritm( &mdl
->index
, i
);
337 if( !strncmp(arr
->name
,name
,16) ){
345 VG_STATIC
int mdl_load_array( mdl_context
*mdl
, mdl_array_ptr
*ptr
,
346 const char *name
, void *lin_alloc
)
348 mdl_array
*arr
= mdl_find_array( mdl
, name
);
351 mdl_load_array_file( mdl
, ptr
, arr
, lin_alloc
);
362 VG_STATIC
int mdl_load_mesh_block( mdl_context
*mdl
, void *lin_alloc
)
366 success
&= mdl_load_array( mdl
, &mdl
->verts
, "mdl_vert", lin_alloc
);
367 success
&= mdl_load_array( mdl
, &mdl
->indices
, "mdl_indice", lin_alloc
);
372 VG_STATIC
int mdl_load_metadata_block( mdl_context
*mdl
, void *lin_alloc
)
376 success
&= mdl_load_array( mdl
, &mdl
->strings
, "strings", lin_alloc
);
377 success
&= mdl_load_array( mdl
, &mdl
->meshs
, "mdl_mesh", lin_alloc
);
378 success
&= mdl_load_array( mdl
, &mdl
->submeshs
, "mdl_submesh", lin_alloc
);
379 success
&= mdl_load_array( mdl
, &mdl
->materials
, "mdl_material", lin_alloc
);
380 success
&= mdl_load_array( mdl
, &mdl
->textures
, "mdl_texture", lin_alloc
);
381 success
&= mdl_load_array( mdl
, &mdl
->armatures
, "mdl_armature", lin_alloc
);
382 success
&= mdl_load_array( mdl
, &mdl
->bones
, "mdl_bone", lin_alloc
);
383 success
&= mdl_load_array( mdl
, &mdl
->animations
,"mdl_animation",lin_alloc
);
388 VG_STATIC
int mdl_load_animation_block( mdl_context
*mdl
, void *lin_alloc
)
390 return mdl_load_array( mdl
, &mdl
->keyframes
, "mdl_keyframe", lin_alloc
);
394 * if calling mdl_open, and the file does not exist, the game will fatal quit
396 VG_STATIC
void mdl_open( mdl_context
*mdl
, const char *path
, void *lin_alloc
)
398 memset( mdl
, 0, sizeof( mdl_context
) );
399 mdl
->file
= fopen( path
, "rb" );
402 vg_error( "mdl_open('%s'): %s\n", path
, strerror(errno
) );
403 vg_fatal_error( "see above for details" );
406 u64 l
= fread( &mdl
->info
, sizeof(mdl_header
), 1, mdl
->file
);
408 mdl_load_fatal_corrupt( mdl
);
410 if( mdl
->info
.version
< MDL_VERSION_NR
){
411 vg_warn( "For model: %s\n", path
);
412 vg_warn( " version: %u (current: %u)\n", mdl
->info
.version
,
415 vg_fatal_error( "Legacy model version incompatable" );
418 mdl_load_array_file( mdl
, &mdl
->index
, &mdl
->info
.index
, lin_alloc
);
420 mdl_array
*pack
= mdl_find_array( mdl
, "pack" );
421 if( pack
) mdl
->pack_base_offset
= pack
->file_offset
;
422 else mdl
->pack_base_offset
= 0;
428 VG_STATIC
void mdl_close( mdl_context
*mdl
)
434 /* useful things you can do with the model */
436 VG_STATIC
void mdl_transform_m4x3( mdl_transform
*transform
, m4x3f mtx
)
438 q_m3x3( transform
->q
, mtx
);
439 v3_muls( mtx
[0], transform
->s
[0], mtx
[0] );
440 v3_muls( mtx
[1], transform
->s
[1], mtx
[1] );
441 v3_muls( mtx
[2], transform
->s
[2], mtx
[2] );
442 v3_copy( transform
->co
, mtx
[3] );
445 VG_STATIC
const char *mdl_pstr( mdl_context
*mdl
, u32 pstr
)
447 return ((char *)mdl_arritm( &mdl
->strings
, pstr
)) + 4;
452 mdl_pstreq( mdl_context
*mdl
, u32 pstr
, const char *str
, u32 djb2
)
454 u32 hash
= *((u32
*)mdl_arritm( &mdl
->strings
, pstr
));
456 if( !strcmp( str
, mdl_pstr( mdl
, pstr
))) return 1;
462 #define MDL_CONST_PSTREQ( MDL, Q, CONSTSTR )\
463 mdl_pstreq( MDL, Q, CONSTSTR, vg_strdjb2( CONSTSTR ) )
466 * Simple mesh interface for OpenGL
467 * ----------------------------------------------------------------------------
470 typedef struct glmesh glmesh
;
473 GLuint vao
, vbo
, ebo
;
478 VG_STATIC
void mesh_upload( glmesh
*mesh
,
479 mdl_vert
*verts
, u32 vert_count
,
480 u32
*indices
, u32 indice_count
)
482 //assert( mesh->loaded == 0 );
484 glGenVertexArrays( 1, &mesh
->vao
);
485 glGenBuffers( 1, &mesh
->vbo
);
486 glGenBuffers( 1, &mesh
->ebo
);
487 glBindVertexArray( mesh
->vao
);
489 size_t stride
= sizeof(mdl_vert
);
491 glBindBuffer( GL_ARRAY_BUFFER
, mesh
->vbo
);
492 glBufferData( GL_ARRAY_BUFFER
, vert_count
*stride
, verts
, GL_STATIC_DRAW
);
494 glBindVertexArray( mesh
->vao
);
495 glBindBuffer( GL_ELEMENT_ARRAY_BUFFER
, mesh
->ebo
);
496 glBufferData( GL_ELEMENT_ARRAY_BUFFER
, indice_count
*sizeof(u32
),
497 indices
, GL_STATIC_DRAW
);
500 glVertexAttribPointer( 0, 3, GL_FLOAT
, GL_FALSE
, stride
, (void*)0 );
501 glEnableVertexAttribArray( 0 );
504 glVertexAttribPointer( 1, 3, GL_FLOAT
, GL_FALSE
,
505 stride
, (void *)offsetof(mdl_vert
, norm
) );
506 glEnableVertexAttribArray( 1 );
509 glVertexAttribPointer( 2, 2, GL_FLOAT
, GL_FALSE
,
510 stride
, (void *)offsetof(mdl_vert
, uv
) );
511 glEnableVertexAttribArray( 2 );
514 glVertexAttribPointer( 3, 4, GL_UNSIGNED_BYTE
, GL_TRUE
,
515 stride
, (void *)offsetof(mdl_vert
, colour
) );
516 glEnableVertexAttribArray( 3 );
519 glVertexAttribPointer( 4, 4, GL_UNSIGNED_SHORT
, GL_TRUE
,
520 stride
, (void *)offsetof(mdl_vert
, weights
) );
521 glEnableVertexAttribArray( 4 );
524 glVertexAttribIPointer( 5, 4, GL_UNSIGNED_BYTE
,
525 stride
, (void *)offsetof(mdl_vert
, groups
) );
526 glEnableVertexAttribArray( 5 );
530 mesh
->indice_count
= indice_count
;
534 VG_STATIC
void mesh_bind( glmesh
*mesh
)
536 glBindVertexArray( mesh
->vao
);
539 VG_STATIC
void mesh_drawn( u32 start
, u32 count
)
541 glDrawElements( GL_TRIANGLES
, count
, GL_UNSIGNED_INT
,
542 (void *)(start
*sizeof(u32
)) );
545 VG_STATIC
void mesh_draw( glmesh
*mesh
)
547 mesh_drawn( 0, mesh
->indice_count
);
550 VG_STATIC
void mesh_free( glmesh
*mesh
)
553 glDeleteVertexArrays( 1, &mesh
->vao
);
554 glDeleteBuffers( 1, &mesh
->ebo
);
555 glDeleteBuffers( 1, &mesh
->vbo
);
560 VG_STATIC
void mdl_draw_submesh( mdl_submesh
*sm
)
562 mesh_drawn( sm
->indice_start
, sm
->indice_count
);
565 VG_STATIC mdl_mesh
*mdl_find_mesh( mdl_context
*mdl
, const char *name
)
567 for( u32 i
=0; i
<mdl_arrcount( &mdl
->meshs
); i
++ ){
568 mdl_mesh
*mesh
= mdl_arritm( &mdl
->meshs
, i
);
569 if( !strcmp( name
, mdl_pstr( mdl
, mesh
->pstr_name
))){
576 struct payload_glmesh_load
{
586 VG_STATIC
void async_mdl_load_glmesh( void *payload
, u32 size
)
588 struct payload_glmesh_load
*job
= payload
;
590 mesh_upload( job
->mesh
, job
->verts
, job
->vertex_count
,
591 job
->indices
, job
->indice_count
);
594 VG_STATIC
void mdl_async_load_glmesh( mdl_context
*mdl
, glmesh
*mesh
)
596 mdl_array
*arr_vertices
= mdl_find_array( mdl
, "mdl_vert" );
597 mdl_array
*arr_indices
= mdl_find_array( mdl
, "mdl_indice" );
599 if( arr_vertices
&& arr_indices
){
600 u32 size_verts
= vg_align8(mdl_query_array_size( arr_vertices
)),
601 size_indices
= vg_align8(mdl_query_array_size( arr_indices
)),
602 size_hdr
= vg_align8(sizeof(struct payload_glmesh_load
)),
603 total
= size_hdr
+ size_verts
+ size_indices
;
605 vg_async_item
*call
= vg_async_alloc( total
);
606 struct payload_glmesh_load
*job
= call
->payload
;
608 u8
*payload
= call
->payload
;
611 job
->verts
= (void*)(payload
+ size_hdr
);
612 job
->indices
= (void*)(payload
+ size_hdr
+ size_verts
);
613 job
->vertex_count
= arr_vertices
->item_count
;
614 job
->indice_count
= arr_indices
->item_count
;
616 mdl_load_array_file_buffer( mdl
, arr_vertices
, job
->verts
);
617 mdl_load_array_file_buffer( mdl
, arr_indices
, job
->indices
);
620 * Unpack the indices (if there are meshes)
621 * ---------------------------------------------------------
624 if( mdl_arrcount( &mdl
->submeshs
) ){
625 mdl_submesh
*sm
= mdl_arritm( &mdl
->submeshs
, 0 );
626 u32 offset
= sm
->vertex_count
;
628 for( u32 i
=1; i
<mdl_arrcount( &mdl
->submeshs
); i
++ ){
629 mdl_submesh
*sm
= mdl_arritm( &mdl
->submeshs
, i
);
630 u32
*indices
= job
->indices
+ sm
->indice_start
;
632 for( u32 j
=0; j
<sm
->indice_count
; j
++ )
633 indices
[j
] += offset
;
635 offset
+= sm
->vertex_count
;
641 * -------------------------
644 vg_async_dispatch( call
, async_mdl_load_glmesh
);
647 vg_fatal_error( "no vertex/indice data\n" );