1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
#include "primitives.h"
#include "colours.h"
#include "maths.h"
#include "ral_types.h"
#include "render_types.h"
// TODO: move to another file
void geo_free_data(geometry_data* geo) {
vertex_darray_free(geo->vertices);
geo->vertices = NULL;
// TODO: do indices as well
/* if (geo->has_indices) { */
/* u32_darray_free(&geo->indices); */
/* } */
}
// vertices
f32 plane_vertex_positions[] = {
// triangle 1
-0.5, 0, -0.5, -0.5, 0, 0.5, 0.5, 0, -0.5,
// triangle 2
0.5, 0, -0.5, -0.5, 0, 0.5, 0.5, 0, 0.5
};
geometry_data geo_create_plane(f32x2 extents) {
f32x2 half_extents = vec2_div(extents, 2.0);
vertex_format format = VERTEX_STATIC_3D;
vertex_darray* vertices = vertex_darray_new(4);
// vertex_darray_push(vertices, (vertex){ .static_3d = { .position = } });
// return (geometry_data) { .format = format, .vertices =.has_indices = true, }
}
// OLD
static const vec3 BACK_BOT_LEFT = (vec3){ 0, 0, 0 };
static const vec3 BACK_BOT_RIGHT = (vec3){ 1, 0, 0 };
static const vec3 BACK_TOP_LEFT = (vec3){ 0, 1, 0 };
static const vec3 BACK_TOP_RIGHT = (vec3){ 1, 1, 0 };
static const vec3 FRONT_BOT_LEFT = (vec3){ 0, 0, 1 };
static const vec3 FRONT_BOT_RIGHT = (vec3){ 1, 0, 1 };
static const vec3 FRONT_TOP_LEFT = (vec3){ 0, 1, 1 };
static const vec3 FRONT_TOP_RIGHT = (vec3){ 1, 1, 1 };
#define VERT_3D(arr, pos, norm, uv) \
{ \
vertex v = { .static_3d = { .position = pos, .normal = norm, .tex_coords = uv } }; \
vertex_darray_push(arr, v); \
}
geometry_data geo_create_cuboid(f32x3 extents) {
/* static mesh prim_cube_mesh_create() { */
vertex_darray* vertices = vertex_darray_new(36);
// back faces
VERT_3D(vertices, BACK_TOP_RIGHT, VEC3_NEG_Z, vec2(1, 0));
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_Z, vec2(0, 1));
VERT_3D(vertices, BACK_TOP_LEFT, VEC3_NEG_Z, vec2(0, 0));
VERT_3D(vertices, BACK_TOP_RIGHT, VEC3_NEG_Z, vec2(1, 0));
VERT_3D(vertices, BACK_BOT_RIGHT, VEC3_NEG_Z, vec2(1, 1));
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_Z, vec2(0, 1));
// front faces
VERT_3D(vertices, FRONT_BOT_LEFT, VEC3_Z, vec2(0, 1));
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_Z, vec2(1, 0));
VERT_3D(vertices, FRONT_TOP_LEFT, VEC3_Z, vec2(0, 0));
VERT_3D(vertices, FRONT_BOT_LEFT, VEC3_Z, vec2(0, 1));
VERT_3D(vertices, FRONT_BOT_RIGHT, VEC3_Z, vec2(1, 1));
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_Z, vec2(1, 0));
// top faces
VERT_3D(vertices, BACK_TOP_LEFT, VEC3_Y, vec2(0, 0));
VERT_3D(vertices, FRONT_TOP_LEFT, VEC3_Y, vec2(0, 1));
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_Y, vec2(1, 1));
VERT_3D(vertices, BACK_TOP_LEFT, VEC3_Y, vec2(0, 0));
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_Y, vec2(1, 1));
VERT_3D(vertices, BACK_TOP_RIGHT, VEC3_Y, vec2(1, 0));
// bottom faces
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_Y, vec2(0, 1));
VERT_3D(vertices, FRONT_BOT_RIGHT, VEC3_NEG_Y, vec2(1, 1));
VERT_3D(vertices, FRONT_BOT_LEFT, VEC3_NEG_Y, vec2(0, 1));
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_Y, vec2(0, 1));
VERT_3D(vertices, BACK_BOT_RIGHT, VEC3_NEG_Y, vec2(1, 1));
VERT_3D(vertices, FRONT_BOT_RIGHT, VEC3_NEG_Y, vec2(0, 1));
// right faces
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_X, vec2(0, 0));
VERT_3D(vertices, BACK_BOT_RIGHT, VEC3_X, vec2(1, 1));
VERT_3D(vertices, BACK_TOP_RIGHT, VEC3_X, vec2(1, 0));
VERT_3D(vertices, BACK_BOT_RIGHT, VEC3_X, vec2(1, 1));
VERT_3D(vertices, FRONT_TOP_RIGHT, VEC3_X, vec2(0, 0));
VERT_3D(vertices, FRONT_BOT_RIGHT, VEC3_X, vec2(0, 1));
// left faces
VERT_3D(vertices, FRONT_TOP_LEFT, VEC3_NEG_X, vec2(0, 0));
VERT_3D(vertices, BACK_TOP_LEFT, VEC3_NEG_X, vec2(0, 0));
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_X, vec2(0, 0));
VERT_3D(vertices, BACK_BOT_LEFT, VEC3_NEG_X, vec2(0, 0));
VERT_3D(vertices, FRONT_BOT_LEFT, VEC3_NEG_X, vec2(0, 0));
VERT_3D(vertices, FRONT_TOP_LEFT, VEC3_NEG_X, vec2(0, 0));
u32_darray* indices = u32_darray_new(vertices->len);
for (u32 i = 0; i < vertices->len; i++) {
u32_darray_push(indices, i);
}
geometry_data geo = {
.format = VERTEX_STATIC_3D,
.vertices = vertices,
.has_indices = true,
.indices = *indices, // FIXME: make darray methods that return stack allocated struct
.colour = vec3(0, 0, 0),
};
return geo;
}
/* /\** @brief create a new model with the shape of a cube *\/ */
/* static model_handle prim_cube_new(core* core) { */
/* model model = { 0 }; */
/* mesh cube = prim_cube_mesh_create(); */
/* mesh_darray_push(model.meshes, cube); */
/* assert(mesh_darray_len(model.meshes) == 1); */
/* u32 index = (u32)model_darray_len(core->models); */
/* model_darray_push_copy(core->models, &model); */
/* return (model_handle){ .raw = index }; */
/* } */
// --- Spheres
geometry_data geo_create_uvsphere(f32 radius, f32 north_south_lines, f32 east_west_lines) {
// TODO
}
|
