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-rw-r--r--src/maths/primitives.h160
1 files changed, 120 insertions, 40 deletions
diff --git a/src/maths/primitives.h b/src/maths/primitives.h
index fd798c1..77dbbae 100644
--- a/src/maths/primitives.h
+++ b/src/maths/primitives.h
@@ -1,55 +1,135 @@
#pragma once
#include <assert.h>
+#include <stdlib.h>
#include "core.h"
+#include "maths.h"
#include "render_types.h"
-static float cube_vertices[] = {
- // positions // normals // texture coords
- -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.5f, -0.5f, -0.5f, 0.0f,
- 0.0f, -1.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
- 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -0.5f, 0.5f, -0.5f, 0.0f,
- 0.0f, -1.0f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-
- -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.5f, -0.5f, 0.5f, 0.0f,
- 0.0f, 1.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
- 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -0.5f, 0.5f, 0.5f, 0.0f,
- 0.0f, 1.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-
- -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, -0.5f, -1.0f,
- 0.0f, 0.0f, 1.0f, 1.0f, -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
- -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, -1.0f,
- 0.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-
- 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 1.0f,
- 0.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
- 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, 0.5f, 1.0f,
- 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-
- -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, -0.5f, 0.0f,
- -1.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
- 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, -0.5f, -0.5f, 0.5f, 0.0f,
- -1.0f, 0.0f, 0.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-
- -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.5f, 0.5f, -0.5f, 0.0f,
- 1.0f, 0.0f, 1.0f, 1.0f, 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
- 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, 0.5f, 0.0f,
- 1.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f
-};
+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 };
static mesh prim_cube_mesh_create() {
mesh cube = { 0 };
cube.vertices = vertex_darray_new(36);
- for (int i = 0; i < 36; i++) {
- vertex vert = { .position = vec3_create(cube_vertices[(i * 8) + 0], cube_vertices[(i * 8) + 1],
- cube_vertices[(i * 8) + 2]),
- .normal = vec3_create(cube_vertices[(i * 8) + 3], cube_vertices[(i * 8) + 4],
- cube_vertices[(i * 8) + 5]),
- .uv = (vec2){ .x = cube_vertices[(i * 8) + 6],
- .y = cube_vertices[(i * 8) + 7] } };
- vertex_darray_push(cube.vertices, vert);
+ // back faces
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_TOP_LEFT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_TOP_LEFT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_TOP_RIGHT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_RIGHT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_Z, .uv = (vec2){ 0 } });
+
+ // front faces
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_BOT_LEFT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_LEFT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_BOT_LEFT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_BOT_RIGHT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_Z, .uv = (vec2){ 0 } });
+
+ // top faces
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_TOP_LEFT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_LEFT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_TOP_LEFT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_TOP_RIGHT, .normal = VEC3_Y, .uv = (vec2){ 0 } });
+
+ // bottom faces
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_BOT_RIGHT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_BOT_LEFT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_RIGHT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_BOT_RIGHT, .normal = VEC3_NEG_Y, .uv = (vec2){ 0 } });
+
+ // right faces
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_BOT_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_TOP_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = BACK_BOT_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_TOP_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(cube.vertices,
+ (vertex){ .position = FRONT_BOT_RIGHT, .normal = VEC3_X, .uv = (vec2){ 0 } });
+
+ // left faces
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_TOP_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_TOP_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = BACK_BOT_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_BOT_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+ vertex_darray_push(
+ cube.vertices,
+ (vertex){ .position = FRONT_TOP_LEFT, .normal = VEC3_NEG_X, .uv = (vec2){ 0 } });
+
+ cube.indices_len = cube.vertices->len;
+ cube.indices = malloc(sizeof(u32) * cube.indices_len);
+
+ for (u32 i = 0; i < cube.indices_len; i++) {
+ cube.indices[i] = i;
}
+
+ cube.has_indices = true;
+
return cube;
}
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