MeshUnmanaged.hpp

#ifndef RAYLIB_CPP_INCLUDE_MESHUNMANAGED_HPP_
#define RAYLIB_CPP_INCLUDE_MESHUNMANAGED_HPP_
 
#include <string>
#include <vector>
 
#include "./raylib.hpp"
#include "./raylib-cpp-utils.hpp"
#include "./BoundingBox.hpp"
#include "./Model.hpp"
 
namespace raylib {
 
class MeshUnmanaged : public ::Mesh {
 public:
    MeshUnmanaged() {
        vertexCount = 0;
        triangleCount = 0;
        vertices = nullptr;
        texcoords = nullptr;
        texcoords2 = nullptr;
        normals = nullptr;
        tangents = nullptr;
        colors = nullptr;
        indices = nullptr;
        animVertices = nullptr;
        animNormals = nullptr;
        boneIds = nullptr;
        boneWeights = nullptr;
        vaoId = 0;
        vboId = nullptr;
    }
 
    MeshUnmanaged(const ::Mesh& mesh) {
        set(mesh);
    }
 
    MeshUnmanaged(::Mesh&& mesh) {
        set(mesh);
    }
 
    // static std::vector<Mesh> Load(std::string_view fileName) {
    //    int count = 0;
    //    ::Mesh* meshes = LoadMeshes(fileName.c_str(), &count);
    //    return std::vector<Mesh>(meshes, meshes + count);
    // }
 
    static MeshUnmanaged Poly(int sides, float radius) {
        return ::GenMeshPoly(sides, radius);
    }
 
    static MeshUnmanaged Plane(float width, float length, int resX, int resZ) {
        return ::GenMeshPlane(width, length, resX, resZ);
    }
 
    static MeshUnmanaged Plane(float width, float length, int resX, int resZ, float textureScale) {
        ::Mesh mesh = {};
 
        resX++;
        resZ++;
 
        // Vertices definition
        int vertexCount = resX*resZ; // vertices get reused for the faces
 
        Vector3 *vertices = (Vector3 *)RL_MALLOC(vertexCount*sizeof(Vector3));
        for (int z = 0; z < resZ; z++)
        {
            // [-length/2, length/2]
            float zPos = ((float)z/(resZ - 1) - 0.5f)*length;
            for (int x = 0; x < resX; x++)
            {
                // [-width/2, width/2]
                float xPos = ((float)x/(resX - 1) - 0.5f)*width;
                vertices[x + z*resX] = (Vector3){ xPos, 0.0f, zPos };
            }
        }
 
        // Normals definition
        Vector3 *normals = (Vector3 *)RL_MALLOC(vertexCount*sizeof(Vector3));
        for (int n = 0; n < vertexCount; n++) normals[n] = (Vector3){ 0.0f, 1.0f, 0.0f };   // Vector3.up;
 
        // TexCoords definition
        Vector2 *texcoords = (Vector2 *)RL_MALLOC(vertexCount*sizeof(Vector2));
        for (int v = 0; v < resZ; v++)
        {
            for (int u = 0; u < resX; u++)
            {
                texcoords[u + v*resX] = (Vector2){ (float)u/(resX - 1), (float)v/(resZ - 1) };
            }
        }
 
        // Triangles definition (indices)
        int numFaces = (resX - 1)*(resZ - 1);
        int *triangles = (int *)RL_MALLOC(numFaces*6*sizeof(int));
        int t = 0;
        for (int face = 0; face < numFaces; face++)
        {
            // Retrieve lower left corner from face ind
            int i = face % (resX - 1) + (face/(resZ - 1)*resX);
 
            triangles[t++] = i + resX;
            triangles[t++] = i + 1;
            triangles[t++] = i;
 
            triangles[t++] = i + resX;
            triangles[t++] = i + resX + 1;
            triangles[t++] = i + 1;
        }
 
        mesh.vertexCount = vertexCount;
        mesh.triangleCount = numFaces*2;
        mesh.vertices = (float *)RL_MALLOC(mesh.vertexCount*3*sizeof(float));
        mesh.texcoords = (float *)RL_MALLOC(mesh.vertexCount*2*sizeof(float));
        mesh.normals = (float *)RL_MALLOC(mesh.vertexCount*3*sizeof(float));
        mesh.indices = (unsigned short *)RL_MALLOC(mesh.triangleCount*3*sizeof(unsigned short));
 
        // Mesh vertices position array
        for (int i = 0; i < mesh.vertexCount; i++)
        {
            mesh.vertices[3*i] = vertices[i].x;
            mesh.vertices[3*i + 1] = vertices[i].y;
            mesh.vertices[3*i + 2] = vertices[i].z;
        }
 
        // Mesh texcoords array
        for (int i = 0; i < mesh.vertexCount; i++)
        {
            mesh.texcoords[2*i] = texcoords[i].x * textureScale;
            mesh.texcoords[2*i + 1] = texcoords[i].y * textureScale;
        }
 
        // Mesh normals array
        for (int i = 0; i < mesh.vertexCount; i++)
        {
            mesh.normals[3*i] = normals[i].x;
            mesh.normals[3*i + 1] = normals[i].y;
            mesh.normals[3*i + 2] = normals[i].z;
        }
 
        // Mesh indices array initialization
        for (int i = 0; i < mesh.triangleCount*3; i++) mesh.indices[i] = triangles[i];
 
        RL_FREE(vertices);
        RL_FREE(normals);
        RL_FREE(texcoords);
        RL_FREE(triangles);
 
        // Upload vertex data to GPU (static mesh)
        UploadMesh(&mesh, false);
 
        return mesh;
    }
 
    static MeshUnmanaged Cube(float width, float height, float length) {
        return ::GenMeshCube(width, height, length);
    }
 
    static MeshUnmanaged Sphere(float radius, int rings, int slices) {
        return ::GenMeshSphere(radius, rings, slices);
    }
 
    static MeshUnmanaged HemiSphere(float radius, int rings, int slices) {
        return ::GenMeshHemiSphere(radius, rings, slices);
    }
 
    static MeshUnmanaged Cylinder(float radius, float height, int slices) {
        return ::GenMeshCylinder(radius, height, slices);
    }
 
    static MeshUnmanaged Cone(float radius, float height, int slices) {
        return ::GenMeshCone(radius, height, slices);
    }
 
    static MeshUnmanaged Torus(float radius, float size, int radSeg, int sides) {
        return ::GenMeshTorus(radius, size, radSeg, sides);
    }
 
    static MeshUnmanaged Knot(float radius, float size, int radSeg, int sides) {
        return ::GenMeshKnot(radius, size, radSeg, sides);
    }
 
    static MeshUnmanaged Heightmap(const ::Image& heightmap, ::Vector3 size) {
        return ::GenMeshHeightmap(heightmap, size);
    }
 
    static MeshUnmanaged Cubicmap(const ::Image& cubicmap, ::Vector3 cubeSize) {
        return ::GenMeshCubicmap(cubicmap, cubeSize);
    }
 
    GETTERSETTER(int, VertexCount, vertexCount)
    GETTERSETTER(int, TriangleCount, triangleCount)
    GETTERSETTER(float*, Vertices, vertices)
    GETTERSETTER(float *, TexCoords, texcoords)
    GETTERSETTER(float *, TexCoords2, texcoords2)
    GETTERSETTER(float *, Normals, normals)
    GETTERSETTER(float *, Tangents, tangents)
    GETTERSETTER(unsigned char *, Colors, colors)
    GETTERSETTER(unsigned short *, Indices, indices) // NOLINT
    GETTERSETTER(float *, AnimVertices, animVertices)
    GETTERSETTER(float *, AnimNormals, animNormals)
    GETTERSETTER(unsigned char *, BoneIds, boneIds)
    GETTERSETTER(float *, BoneWeights, boneWeights)
    GETTERSETTER(unsigned int, VaoId, vaoId)
    GETTERSETTER(unsigned int *, VboId, vboId)
 
    MeshUnmanaged& operator=(const ::Mesh& mesh) {
        set(mesh);
        return *this;
    }
 
    void Unload() {
        if (vboId != nullptr) {
            ::UnloadMesh(*this);
            vboId = nullptr;
        }
    }
 
    void Upload(bool dynamic = false) {
        ::UploadMesh(this, dynamic);
    }
 
    void UpdateBuffer(int index, void *data, int dataSize, int offset = 0) {
        ::UpdateMeshBuffer(*this, index, data, dataSize, offset);
    }
 
    void Draw(const ::Material& material, const ::Matrix& transform) const {
        ::DrawMesh(*this, material, transform);
    }
 
    void Draw(const ::Material& material, ::Matrix* transforms, int instances) const {
        ::DrawMeshInstanced(*this, material, transforms, instances);
    }
 
    void Export(std::string_view fileName) {
        if (!::ExportMesh(*this, fileName.data())) {
            throw RaylibException("Failed to export the Mesh");
        }
    }
 
    raylib::BoundingBox BoundingBox() const {
        return ::GetMeshBoundingBox(*this);
    }
 
    operator raylib::BoundingBox() {
        return BoundingBox();
    }
 
    raylib::BoundingBox GetTransformedBoundingBox(::Matrix transform) const {
        // Get min and max vertex to construct bounds (AABB)
        raylib::Vector3 minVertex = { 0 };
        raylib::Vector3 maxVertex = { 0 };
 
        if (vertices != NULL)
        {
            minVertex = raylib::Vector3{ vertices[0], vertices[1], vertices[2] }.Transform(transform);
            maxVertex = raylib::Vector3{ vertices[0], vertices[1], vertices[2] }.Transform(transform);
 
            for (int i = 1; i < vertexCount; i++)
            {
                minVertex = Vector3Min(minVertex, raylib::Vector3{ vertices[i*3], vertices[i*3 + 1], vertices[i*3 + 2] }.Transform(transform));
                maxVertex = Vector3Max(maxVertex, raylib::Vector3{ vertices[i*3], vertices[i*3 + 1], vertices[i*3 + 2] }.Transform(transform));
            }
        }
 
        // Create the bounding box
        raylib::BoundingBox box = {};
        box.min = minVertex;
        box.max = maxVertex;
 
        return box;
    }
 
    Mesh& GenTangents() {
        ::GenMeshTangents(this);
        return *this;
    }
 
    raylib::Model LoadModelFrom() const {
        return ::LoadModelFromMesh(*this);
    }
 
    operator raylib::Model() {
        return ::LoadModelFromMesh(*this);
    }
 
 protected:
    void set(const ::Mesh& mesh) {
        vertexCount = mesh.vertexCount;
        triangleCount = mesh.triangleCount;
        vertices = mesh.vertices;
        texcoords = mesh.texcoords;
        texcoords2 = mesh.texcoords2;
        normals = mesh.normals;
        tangents = mesh.tangents;
        colors = mesh.colors;
        indices = mesh.indices;
        animVertices = mesh.animVertices;
        animNormals = mesh.animNormals;
        boneIds = mesh.boneIds;
        boneWeights = mesh.boneWeights;
        vaoId = mesh.vaoId;
        vboId = mesh.vboId;
    }
};
 
inline BoundingBox Model::GetTransformedBoundingBox() const {
    BoundingBox bounds = {};
 
    if (meshCount > 0)
    {
        Vector3 temp = { 0 };
        bounds = (*(raylib::MeshUnmanaged*)(&meshes[0])).GetTransformedBoundingBox(transform);
 
        for (int i = 1; i < meshCount; i++)
        {
            BoundingBox tempBounds = (*(raylib::MeshUnmanaged*)(&meshes[i])).GetTransformedBoundingBox(transform);
 
            temp.x = (bounds.min.x < tempBounds.min.x)? bounds.min.x : tempBounds.min.x;
            temp.y = (bounds.min.y < tempBounds.min.y)? bounds.min.y : tempBounds.min.y;
            temp.z = (bounds.min.z < tempBounds.min.z)? bounds.min.z : tempBounds.min.z;
            bounds.min = temp;
 
            temp.x = (bounds.max.x > tempBounds.max.x)? bounds.max.x : tempBounds.max.x;
            temp.y = (bounds.max.y > tempBounds.max.y)? bounds.max.y : tempBounds.max.y;
            temp.z = (bounds.max.z > tempBounds.max.z)? bounds.max.z : tempBounds.max.z;
            bounds.max = temp;
        }
    }
 
    return bounds;
}
}  // namespace raylib
 
using RMeshUnmanaged = raylib::MeshUnmanaged;
 
#endif  // RAYLIB_CPP_INCLUDE_MESHUNMANAGED_HPP_