add graphics/core/Model

src/graphics/core/Model.cpp

@@ -0,0 +1,28 @@
+#include "Model.hpp"
+
+using namespace model;
+
+inline constexpr glm::vec3 X(1, 0, 0);
+inline constexpr glm::vec3 Y(0, 1, 0);
+inline constexpr glm::vec3 Z(0, 0, 1);
+
+void Mesh::addPlane(glm::vec3 pos, glm::vec3 right, glm::vec3 up, glm::vec3 norm) {
+    vertices.push_back({pos-right-up, {0,0}, norm});
+    vertices.push_back({pos+right-up, {1,0}, norm});
+    vertices.push_back({pos+right+up, {1,1}, norm});
+
+    vertices.push_back({pos-right-up, {0,0}, norm});
+    vertices.push_back({pos+right+up, {1,1}, norm});
+    vertices.push_back({pos-right+up, {0,1}, norm});
+}
+
+void Mesh::addBox(glm::vec3 pos, glm::vec3 size) {
+    addPlane(pos+Z*size, X*size, Y*size, Z);
+    addPlane(pos-Z*size, -X*size, Y*size, -Z);
+
+    addPlane(pos+Y*size, X*size, -Z*size, Y);
+    addPlane(pos-Y*size, X*size, Z*size, -Y);
+
+    addPlane(pos+X*size, -Z*size, Y*size, X);
+    addPlane(pos-X*size, Z*size, Y*size, -X);
+}

src/graphics/core/Model.hpp

@@ -0,0 +1,33 @@
+#ifndef GRAPHICS_CORE_MODEL_HPP_
+#define GRAPHICS_CORE_MODEL_HPP_
+
+#include <string>
+#include <vector>
+#include <glm/glm.hpp>
+
+namespace model {
+    struct Vertex {
+        glm::vec3 coord;
+        glm::vec2 uv;
+        glm::vec3 normal;
+    };
+
+    struct Mesh {
+        std::string texture;
+        std::vector<Vertex> vertices;
+    
+        void addPlane(glm::vec3 pos, glm::vec3 right, glm::vec3 up, glm::vec3 norm);
+        void addBox(glm::vec3 pos, glm::vec3 size);
+    };
+
+    struct Model {
+        std::vector<Mesh> meshes;
+
+        Mesh& addMesh(const std::string& texture) {
+            meshes.push_back({texture, {}});
+            return meshes[meshes.size()-1];
+        }
+    };
+}
+
+#endif // GRAPHICS_CORE_MODEL_HPP_