From 6d4b56258b89ba12bec5e329b81de62284c47ce1 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Thu, 2 Jan 2025 14:55:23 +1100
Subject: model instance system

---
 model.hpp | 54 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 45 insertions(+), 9 deletions(-)

(limited to 'model.hpp')

diff --git a/model.hpp b/model.hpp
index 0dd8c43..53fb0fb 100644
--- a/model.hpp
+++ b/model.hpp
@@ -27,7 +27,7 @@ struct Mesh {
 	int offset, vbo_offset, count;
 	int parent, mesh_binding, mvp_binding, mat_binding;
 	bool world_dirty;
-	m4f local, world;
+	m4f world, local;
 	Shader_Id shader;
 	Material* material;
 	const m4f& get_world(Model& m);
@@ -36,8 +36,6 @@ struct Mesh {
 struct Model : public Asset {
 	Buffer_Id vbo;
 	Buffer_Id ibo;
-	Buffer_Id mvp;
-	Buffer_Id mat;
 	int mesh_count;
 
 	Mesh* get_meshes() {
@@ -51,12 +49,6 @@ struct Model : public Asset {
 		const m4f& transform,
 		const m4f& view_projection
 	);
-	void render(
-		Device* dev,
-		Arena* a,
-		Render_Pass& pass,
-		Sampler_Id sampler
-	);
 };
 
 struct Model_Loader : public Asset_Loader {
@@ -85,4 +77,48 @@ struct Material_Loader : public Asset_Loader {
 	void unload(Asset* a) override;
 };
 
+struct Camera {
+	float fov, near, far, asp;
+	v3f forward, position;
+	void init(float vfov, const v3f& f, const v3f& p);
+	m4f get_view() const;
+	m4f get_proj() const;
+};
+
+struct Model_Instance {
+	Buffer_Id mvp;
+	Buffer_Id mat;
+	m4f transform;
+	Model* m;
+
+	void init(Device* dev, Model* model);
+	void destroy(Device* dev);
+	void update_cbuffers(Device* dev, const Camera& cam);
+	void render(
+		Device* dev,
+		Arena* a,
+		Render_Pass& pass,
+		Sampler_Id sampler
+	);
+};
+
+struct Model_Scene {
+	Model_Instance* instances;
+	int count, max;
+	Sampler_Id sampler;
+
+	Model_Instance* instantiate(Device* dev, Model* model);
+	void uninstantiate(Device* dev, Model_Instance* model);
+	void destroy(Device* dev);
+
+	void init(Arena* arena, int max_instances, Sampler_Id s);
+	void update(const Camera& cam, Device* dev);
+	void render(
+		Device* dev,
+		Arena* a,
+		Render_Pass& pass,
+		Sampler_Id sampler
+	);
+};
+
 #endif
-- 
cgit v1.2.3-54-g00ecf