i did a lot

1 files changed, 79 insertions, 0 deletions

diff --git a/src/render.c b/src/render.c
new file mode 100644
index 0000000..b70832b
--- /dev/null
+++ b/src/render.c
@@ -0,0 +1,79 @@
+#include <cglm/cglm.h>
+
+#include "voxel.h"
+#include "gl.h"
+
+#define MATS_UBO_BINDING 1
+#define FACE_UBO_BINDING 2
+
+VOXEL_RESULT renderer_init(Renderer *renderer)
+{
+	// load quad mesh
+	float quad_verts[] = {
+		0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0,
+	};
+	mesh_init(&renderer->quad, 6);
+	mesh_store_float(&renderer->quad, quad_verts, 6 * 3, 3);
+	mesh_finish();
+
+	// load shader
+	if (shader_init(&renderer->shader, "assets/vertex.glsl", "assets/fragment.glsl") !=
+		GL_OK)
+		return VOXEL_ERROR;
+
+	// load matricies uniform
+	uniform_init(&renderer->matrices, sizeof(mat4) * 2);
+	uniform_bind(&renderer->matrices, 1);
+	shader_load_ubo(&renderer->shader, "Matrices", MATS_UBO_BINDING);
+	shader_load_ubo(&renderer->shader, "Face", FACE_UBO_BINDING);
+
+	return VOXEL_OK;
+}
+
+void renderer_start(Renderer *renderer, Camera *camera)
+{
+	mat4 proj, view;
+
+	camera_proj(camera, proj);
+	camera_view(camera, view);
+	uniform_store(&renderer->matrices, 0, sizeof(mat4), proj);
+	uniform_store(&renderer->matrices, sizeof(mat4), sizeof(mat4), view);
+
+	shader_bind(&renderer->shader);
+	mesh_bind(&renderer->quad);
+
+	renderer->frustum = camera->frustum;
+}
+
+void renderer_draw(Renderer *renderer, Chunk *chunk)
+{
+	Uniform mesh;
+	AABB aabb;
+
+	if (chunk->has_mesh == false)
+		return;
+
+	aabb = chunk_aabb(chunk);
+	if (!aabb_in_frustum(&aabb, &renderer->frustum))
+		return;
+
+	mesh = chunk->mesh;
+	uniform_bind(&mesh, FACE_UBO_BINDING);
+	shader_load_ivec3(&renderer->shader, "chunk_position", chunk->pos);
+	mesh_draw_instanced(&renderer->quad, mesh.len / sizeof(u64));
+	uniform_unbind(FACE_UBO_BINDING);
+}
+
+void renderer_stop(Renderer *renderer)
+{
+	mesh_unbind(&renderer->quad);
+	shader_unbind();
+}
+
+void renderer_free(Renderer *renderer)
+{
+	uniform_unbind(MATS_UBO_BINDING);
+	uniform_free(&renderer->matrices);
+	shader_free(&renderer->shader);
+	mesh_free(&renderer->quad);
+}