Starting matricies, etc...

cve_game_object.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "cve_model.hpp"
+
+#include <memory>
+
+namespace cve {
+
+  struct Transform2dComponent {
+    glm::vec2 translation{}; // Position offset
+    glm::mat2 mat2() { return glm::mat2{1.f}; };
+  };
+
+  class CveGameObject {
+    public:
+      using id_t = unsigned int;
+
+      static CveGameObject createGameObject() {
+        static id_t currentId = 0;
+        return CveGameObject{currentId++};
+      }
+
+      CveGameObject(const CveGameObject &) = delete;
+      CveGameObject &operator=(const CveGameObject &) = delete;
+      CveGameObject(CveGameObject &&) = default;
+      CveGameObject &operator=(CveGameObject &&) = default;
+
+      const id_t getId() { return id; }
+
+      std::shared_ptr<CveModel> model{};
+      glm::vec3 color;
+      Transform2dComponent transform2d{};
+
+    private:
+      CveGameObject(id_t objID) : id{objID} {}
+      id_t id;
+  };
+}

first_app.cpp

@@ -9,6 +9,7 @@
 
 namespace cve {
   struct SimplePushConstantData{
+    glm::mat2 transform{1.f}; // Identity matrix
     glm::vec2 offset;
     alignas(16) glm::vec3 color;
   };

first_app.hpp

@@ -5,6 +5,7 @@
 #include "cve_device.hpp"
 #include "cve_swap_chain.hpp"
 #include "cve_model.hpp"
+#include "cve_game_object.hpp"
 
 #include <memory>
 #include <vector>

shaders/simple_shader.frag

@@ -3,6 +3,7 @@
 layout(location = 0) out vec4 outColor;
 
 layout(push_constant) uniform Push {
+  mat2 transform;
   vec2 offset;
   vec3 color;
 } push;

shaders/simple_shader.vert

@@ -4,10 +4,11 @@ layout(location = 0) in vec2 position;
 layout(location = 1) in vec3 color;
 
 layout(push_constant) uniform Push {
+  mat2 transform;
   vec2 offset;
   vec3 color;
 } push;
 
 void main() {
-  gl_Position = vec4(position + push.offset, 0.0, 1.0);
+  gl_Position = vec4(push.transform * position + push.offset, 0.0, 1.0);
 }