From e31535abfff4c3335dd465e3745a69d3102253a6 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Sat, 28 Dec 2024 18:27:30 +1100
Subject: converting, loading and rendering GLTF models

---
 c2.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

(limited to 'c2.cpp')

diff --git a/c2.cpp b/c2.cpp
index ba07606..9327727 100644
--- a/c2.cpp
+++ b/c2.cpp
@@ -1,4 +1,5 @@
 #include "app.hpp"
+#include "model.hpp"
 #include "ui.hpp"
 #include "video.hpp"
 extern "C" {
@@ -65,14 +66,21 @@ struct Config_Buffer {
 	float offset[2];
 };
 
+struct Config_Buffer2 {
+	m4f transform;
+	m4f projection;
+};
+
 extern "C" int entrypoint() {
 	Arena video_arena, asset_arena, ui_arena;
+	Model_Loader model_loader;
 	Asset_Arena assets;
 	Device* dev;
 	Shader* shader, * ui_shader;
 	Texture* texture;
 	Texture* texture2;
-	Buffer_Id vbo, cbuf;
+	Model* monkey;
+	Buffer_Id vbo, cbuf, cbuf2;
 	Sampler_Id clamped_linear;
 	UI* ui;
 	C2* app = App::create<C2>("c2");
@@ -96,13 +104,21 @@ extern "C" int entrypoint() {
 	);
 	assets.init(&asset_arena, "pack");
 	dev = Device::create(&video_arena, app); 
+	model_loader.init(dev, &assets);
+	register_asset_loader("MODL", &model_loader);
+	monkey = (Model*)assets.load("monkey.mdl");
 	app->dev = dev;
 	shader = (Shader*)assets.load("triangle.csh");
 	ui_shader = (Shader*)assets.load("ui.csh");
 	texture = (Texture*)assets.load("22.tex");
 	texture2 = (Texture*)assets.load("kita.tex");
 	cbuf = dev->create_buffer(
-		sizeof verts,
+		sizeof(Config_Buffer),
+		Buffer_Flags::constant_buffer |
+		Buffer_Flags::cpu_readwrite
+	);
+	cbuf2 = dev->create_buffer(
+		sizeof(Config_Buffer2),
 		Buffer_Flags::constant_buffer |
 		Buffer_Flags::cpu_readwrite
 	);
@@ -115,6 +131,8 @@ extern "C" int entrypoint() {
 	ui->create_label("Hello, world", 10, 15);
 	assert(per_frame != 0);
 	uint8_t r = 0;
+	float rot = 0.0f;
+	v3f raxis(0.0f, 1.0f, 0.0);
 	vbo = upload_verts(dev);
 	while (app->running) {
 		Arena frame_arena;
@@ -134,6 +152,28 @@ extern "C" int entrypoint() {
 			dev->unmap_buffer(cbuf);
 		}
 
+		{
+			Texture& bb = dev->get_texture(dev->get_backbuffer());
+			void* mem;
+			mem = dev->map_buffer(cbuf2, 0, sizeof(Config_Buffer2));
+			Config_Buffer2* c = (Config_Buffer2*)mem;
+			c->projection = m4f::pers(
+				70.0f,
+				(float)bb.w / (float)bb.h,
+				0.01f,
+				100.0f
+			);
+			c->transform = (m4f::translate(
+				m4f::identity(),
+				v3f(0.0f, 0.0f, -5.0f)
+			) * m4f::rotate(
+				m4f::identity(),
+				rot,
+				raxis
+			));
+			dev->unmap_buffer(cbuf2);
+		}
+
 		Pipeline_Builder pb(&frame_arena);
 		pb.begin_rp();
 		pb.rp_target(dev->get_backbuffer(), { r, 0x00, 0xff, 0xff });
@@ -166,9 +206,15 @@ extern "C" int entrypoint() {
 
 		dev->get_ctx().submit(draw, pip, pass);
 
+		pb.begin_rp();
+		pb.rp_target(dev->get_backbuffer(), Clear_Mode::restore);
+		Render_Pass& pass2 = pb.build_rp();
+		monkey->render(dev, &frame_arena, pass2, cbuf2);
+
 		ui->render(&frame_arena, dev->get_backbuffer());
 
 		r += 10;
+		rot += 0.05f;
 		frame++;
 		dev->present();
 		app->end();
@@ -178,6 +224,7 @@ extern "C" int entrypoint() {
 	dev->destroy_sampler(clamped_linear);
 	dev->destroy_buffer(vbo);
 	dev->destroy_buffer(cbuf);
+	dev->destroy_buffer(cbuf2);
 	dev->destroy();
 	app->destroy();
 	return 0;
-- 
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