move graphics/core/Model to graphics/commons/Model

src/graphics/commons/Model.cpp

@@ -0,0 +1,80 @@
+#include "Model.hpp"
+
+#include <algorithm>
+
+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(
+    const glm::vec3& pos,
+    const glm::vec3& right,
+    const glm::vec3& up,
+    const 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::addPlane(
+    const glm::vec3& pos,
+    const glm::vec3& right,
+    const glm::vec3& up,
+    const glm::vec3& norm,
+    const UVRegion& uv
+) {
+    vertices.push_back({pos-right-up, {uv.u1, uv.v1}, norm});
+    vertices.push_back({pos+right-up, {uv.u2, uv.v1}, norm});
+    vertices.push_back({pos+right+up, {uv.u2, uv.v2}, norm});
+
+    vertices.push_back({pos-right-up, {uv.u1, uv.v1}, norm});
+    vertices.push_back({pos+right+up, {uv.u2, uv.v2}, norm});
+    vertices.push_back({pos-right+up, {uv.u1, uv.u2}, norm});
+}
+
+void Mesh::addBox(const glm::vec3& pos, const 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);
+}
+
+void Mesh::addBox(
+    const glm::vec3& pos, const glm::vec3& size, const UVRegion (&uvs)[6]
+) {
+    addPlane(pos+Z*size, X*size, Y*size, Z, uvs[0]);
+    addPlane(pos-Z*size, -X*size, Y*size, -Z, uvs[1]);
+
+    addPlane(pos+Y*size, X*size, -Z*size, Y, uvs[2]);
+    addPlane(pos-Y*size, X*size, Z*size, -Y, uvs[3]);
+
+    addPlane(pos+X*size, -Z*size, Y*size, X, uvs[4]);
+    addPlane(pos-X*size, Z*size, Y*size, -X, uvs[5]);
+}
+
+void Mesh::scale(const glm::vec3& size) {
+    for (auto& vertex : vertices) {
+        vertex.coord *= size;
+    }
+}
+
+void Model::clean() {
+    meshes.erase(
+        std::remove_if(meshes.begin(), meshes.end(), 
+        [](const Mesh& mesh){
+            return mesh.vertices.empty();
+        }),
+        meshes.end()
+    );
+}

src/graphics/commons/Model.hpp

@@ -0,0 +1,56 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <glm/glm.hpp>
+
+#include "maths/UVRegion.hpp"
+
+namespace model {
+    struct Vertex {
+        glm::vec3 coord;
+        glm::vec2 uv;
+        glm::vec3 normal;
+    };
+
+    struct Mesh {
+        std::string texture;
+        std::vector<Vertex> vertices;
+        bool lighting = true;
+
+        void addPlane(
+            const glm::vec3& pos,
+            const glm::vec3& right,
+            const glm::vec3& up,
+            const glm::vec3& norm
+        );
+        void addPlane(
+            const glm::vec3& pos,
+            const glm::vec3& right,
+            const glm::vec3& up,
+            const glm::vec3& norm,
+            const UVRegion& region
+        );
+        void addBox(const glm::vec3& pos, const glm::vec3& size);
+        void addBox(
+            const glm::vec3& pos,
+            const glm::vec3& size,
+            const UVRegion (&texfaces)[6]
+        );
+        void scale(const glm::vec3& size);
+    };
+
+    struct Model {
+        std::vector<Mesh> meshes;
+
+        /// @brief Add mesh to the model
+        /// @param texture texture name
+        /// @return writeable Mesh
+        Mesh& addMesh(const std::string& texture) {
+            meshes.push_back({texture, {}});
+            return meshes[meshes.size()-1];
+        }
+        /// @brief Remove all empty meshes
+        void clean();
+    };
+}