uniforms with matrix tranformations and ply loading

Makefile

@@ -21,8 +21,8 @@ OBJS	:=$(call GETOBJS,$(SRCS))
 TARGET	:=shooter
 
 .DEFAULT_GOAL: dbg
-dbg: $(BINDIR)/$(TARGET)
-rel: $(BINDIR)/$(TARGET)
+dbg: $(BINDIR)/$(TARGET) shaders
+rel: $(BINDIR)/$(TARGET) shaders
 
 # It exists so run this
 ifeq ($(SDL3_EXISTS),0)

shaders/glsl/test.vert.glsl

@@ -6,7 +6,13 @@ layout(location = 2) in vec3 normal;
 
 layout(location = 0) out vec4 colorOut;
 
+layout(set = 0, binding = 0) uniform UniformBufferObject {
+    mat4 model;
+    mat4 view;
+    mat4 projection;
+} ubo;
+
 void main() {
-    gl_Position = vec4(position, 1.0);
-    colorOut = vec4(normal, 1.0);
+    gl_Position = ubo.projection * ubo.view * ubo.model * vec4(position, 1.0);
+    colorOut = vec4(normal, 1.0); // Example: pass the normal as color
 }

src/linear.c

@@ -8,6 +8,7 @@
 
 // Header
 #include "linear.h"
+#include "common.h"
 
 // Function definitions
 u0 vec2_add_vec2 ( vec2 *p_result, vec2 a, vec2 b )
@@ -804,7 +805,7 @@ u0 mat4_view_from_vec3 ( mat4 *p_view, vec3 eye, vec3 target, vec3 up )
         {
             no_view:
                 #ifndef NDEBUG
-                    printf("[camera] Null pointer provided for parameter \"p_view\" in call to function \"%s\"\n", __FUNCTION__);
+                    die("p_view: nullptr");
                 #endif
 
                 // Error
@@ -841,11 +842,11 @@ u0 mat4_perspective_from_vec3 ( mat4 *p_projection, float fov, float aspect, flo
         {
             no_projection:
                 #ifndef NDEBUG
-                    printf("[camera] Null pointer provided for parameter \"p_projection\" in call to function \"%s\"\n", __FUNCTION__);
+                    die("p_projection: nullptr");
                 #endif
 
                 // Error
                 return;
         }
     }
-}
+}

src/linear.h

@@ -671,4 +671,4 @@ u0 mat4_perspective_from_vec3
     float  aspect,
     float  near_clip,
     float  far_clip
-);
+);

src/main.c

@@ -3,12 +3,15 @@
 #include <SDL3/SDL_main.h>
 
 #include "common.h"
+#include "linear.h"
 #include "mesh.h"
 #include "shapes.h"
 
 #define SHADERFORMATS (SDL_GPU_SHADERFORMAT_SPIRV | SDL_GPU_SHADERFORMAT_METALLIB)
 #define USEMSAA true
 
+#define WINDOW_WIDTH 800.0f
+#define WINDOW_HEIGHT 600.0f
 static SDL_Window* window;
 static SDL_GPUDevice* gpu;
 static SDL_GPUGraphicsPipeline* pipeline;
@@ -77,7 +80,8 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[])
         sdldie("SDL_Init");
     }
 
-    if (!(window = SDL_CreateWindow("obama", 800, 600, SDL_WINDOW_HIGH_PIXEL_DENSITY))) {
+    if (!(window = SDL_CreateWindow(
+              "obama", WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_HIGH_PIXEL_DENSITY))) {
         sdldie("SDL_CreateWindow");
     }
     if (!(gpu = SDL_CreateGPUDevice(SHADERFORMATS, true, NULL))) {
@@ -92,7 +96,7 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[])
                   .num_samplers = 0,
                   .num_storage_buffers = 0,
                   .num_storage_textures = 0,
-                  .num_uniform_buffers = 0,
+                  .num_uniform_buffers = 1,
                   .props = 0,
               }))
             .shader) {
@@ -241,14 +245,21 @@ SDL_AppResult SDL_AppIterate(void* appstate)
         sdldie("SDL_AcquireGPUSwapchainTexture");
     }
 
-    // To many frames in flight? Don't render this frame.
+    // Too many frames in flight? Don't render this frame.
     if (!swap.tex) {
         SDL_SubmitGPUCommandBuffer(cmdbuf);
         return SDL_APP_CONTINUE;
     }
 
     // TODO: Resize window textures
 
+    mat4 _mat4s[3];
+    mat4_identity(&_mat4s[0]);
+    mat4_identity(&_mat4s[1]);
+    mat4_perspective_from_vec3(&_mat4s[2], 80.0f, WINDOW_WIDTH / WINDOW_HEIGHT, 0.1f, 100.0f);
+
+    SDL_PushGPUVertexUniformData(cmdbuf, 0, &_mat4s, sizeof(_mat4s));
+
     SDL_GPURenderPass* pass = SDL_BeginGPURenderPass(cmdbuf,
         &(SDL_GPUColorTargetInfo) {
             .clear_color = { .r = 0.2f, .g = 0.3f, .b = 0.3f, .a = 1.0f },
@@ -260,6 +271,7 @@ SDL_AppResult SDL_AppIterate(void* appstate)
             .cycle_resolve_texture = !!tex_msaa,
         },
         1, NULL);
+
     SDL_BindGPUGraphicsPipeline(pass, pipeline);
     mesh_bind(&mesh, pass);
     SDL_DrawGPUIndexedPrimitives(pass, mesh.idxs.len, 1, 0, 0, 0);