From 2a733f3d513a7279c1df4efe88fc5386ced2ed14 Mon Sep 17 00:00:00 2001
From: kartofen <mladenovnasko0@gmail.com>
Date: Fri, 10 Nov 2023 21:30:33 +0200
Subject: uniform buffer added

---
 src/main.c | 41 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 38 insertions(+), 3 deletions(-)

(limited to 'src/main.c')

diff --git a/src/main.c b/src/main.c
index 4b5685d..c4bf2c3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,14 +1,27 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/times.h>
+#include <cglm/cglm.h>
+#include <cglm/struct.h>
 
 #include "graphics.h"
 #include "window.h"
 #include "common.h"
 
+#define SW 640
+#define SH 480
+
 window_t window;
 graphics_t graphics;
 
 int _create_surface(VkInstance instance, VkSurfaceKHR *surface);
+int update_ubo(void *uniform_buffer);
+
+struct ubo {
+    mat4 model;
+    mat4 view;
+    mat4 proj;
+}; 
 
 vertex_t vertices[] = {
     {{-0.5f, -0.5f}, {1.0f, 0.0f, 0.0f}},
@@ -33,9 +46,9 @@ int main(void)
     // populate window info
     struct window_info win_info = {0};
     win_info.title = "Test App";
-    win_info.flags = SDL_WINDOW_RESIZABLE;
-    win_info.w = 640;
-    win_info.h = 480;
+    // win_info.flags = SDL_WINDOW_RESIZABLE;
+    win_info.w = SW;
+    win_info.h = SH;
     
     // create window
     window = window_create(&win_info);
@@ -64,6 +77,9 @@ int main(void)
     grph_info.indices = indices;
     grph_info.nindices = ARR_SIZE(indices);
 
+    grph_info.ubo_size = sizeof(struct ubo);
+    grph_info.update_ubo = update_ubo;
+
     grph_info.surface_func = _create_surface;
     
     // create the device
@@ -96,6 +112,25 @@ f2: SDL_Quit();
 f1: return ret;
 }
 
+int update_ubo(void *uniform_buffer)
+{
+    struct ubo *ubo = (struct ubo *)uniform_buffer;
+
+    static float time = 1.0f;
+    time += 0.01f;
+
+    memcpy(ubo->model, glms_mat4_identity().raw, sizeof(ubo->model));
+    glm_rotate(&ubo->model, time * glm_rad(90.0f),
+               (vec3){0.0f, 0.0f, 1.0f});
+
+    glm_lookat((vec3){1.0f, 1.0f, 2.0f}, (vec3){0.0f, 0.0f, 0.0f}, (vec3){0.0f, 0.0f, 1.0f}, ubo->view);
+ 
+    glm_perspective(glm_rad(45.0f), (float)SW/(float)SH, 0.1f, 10.0f, ubo->proj);
+
+    ubo->proj[1][1] *= -1;
+    return 0;
+}
+
 int _create_surface(VkInstance instance, VkSurfaceKHR *surface)
 {
     return window_create_surface(window, instance, surface);
-- 
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