diff options
Diffstat (limited to 'src/models.c')
| -rw-r--r-- | src/models.c | 234 |
1 files changed, 164 insertions, 70 deletions
diff --git a/src/models.c b/src/models.c index bef19e10..0a692f5c 100644 --- a/src/models.c +++ b/src/models.c @@ -1,17 +1,19 @@ /********************************************************************************************** * -* raylib.models - Basic functions to draw 3d shapes and 3d models +* raylib.models - Basic functions to deal with 3d shapes and 3d models * * CONFIGURATION: * -* #define SUPPORT_FILEFORMAT_OBJ / SUPPORT_LOAD_OBJ +* #define SUPPORT_FILEFORMAT_OBJ +* Selected desired fileformats to be supported for loading. * * #define SUPPORT_FILEFORMAT_MTL +* Selected desired fileformats to be supported for loading. * * * LICENSE: zlib/libpng * -* Copyright (c) 2014-2016 Ramon Santamaria (@raysan5) +* Copyright (c) 2014-2017 Ramon Santamaria (@raysan5) * * This software is provided "as-is", without any express or implied warranty. In no event * will the authors be held liable for any damages arising from the use of this software. @@ -30,6 +32,12 @@ * **********************************************************************************************/ +// Default configuration flags (supported features) +//------------------------------------------------- +#define SUPPORT_FILEFORMAT_OBJ +#define SUPPORT_FILEFORMAT_MTL +//------------------------------------------------- + #include "raylib.h" #if defined(PLATFORM_ANDROID) @@ -61,8 +69,12 @@ //---------------------------------------------------------------------------------- // Module specific Functions Declaration //---------------------------------------------------------------------------------- +#if defined(SUPPORT_FILEFORMAT_OBJ) static Mesh LoadOBJ(const char *fileName); // Load OBJ mesh data +#endif +#if defined(SUPPORT_FILEFORMAT_MTL) static Material LoadMTL(const char *fileName); // Load MTL material data +#endif static Mesh GenMeshHeightmap(Image image, Vector3 size); static Mesh GenMeshCubicmap(Image cubicmap, Vector3 cubeSize); @@ -580,8 +592,11 @@ Mesh LoadMesh(const char *fileName) { Mesh mesh = { 0 }; - if (strcmp(GetExtension(fileName), "obj") == 0) mesh = LoadOBJ(fileName); - else TraceLog(WARNING, "[%s] Mesh extension not recognized, it can't be loaded", fileName); +#if defined(SUPPORT_FILEFORMAT_OBJ) + if (IsFileExtension(fileName, ".obj")) mesh = LoadOBJ(fileName); +#else + TraceLog(WARNING, "[%s] Mesh fileformat not supported, it can't be loaded", fileName); +#endif if (mesh.vertexCount == 0) TraceLog(WARNING, "Mesh could not be loaded"); else rlglLoadMesh(&mesh, false); // Upload vertex data to GPU (static mesh) @@ -592,13 +607,13 @@ Mesh LoadMesh(const char *fileName) } // Load mesh from vertex data -// NOTE: All vertex data arrays must be same size: numVertex -Mesh LoadMeshEx(int numVertex, float *vData, float *vtData, float *vnData, Color *cData) +// NOTE: All vertex data arrays must be same size: vertexCount +Mesh LoadMeshEx(int vertexCount, float *vData, float *vtData, float *vnData, Color *cData) { Mesh mesh = { 0 }; - mesh.vertexCount = numVertex; - mesh.triangleCount = numVertex/3; + mesh.vertexCount = vertexCount; + mesh.triangleCount = vertexCount/3; mesh.vertices = vData; mesh.texcoords = vtData; mesh.texcoords2 = NULL; @@ -690,8 +705,11 @@ Material LoadMaterial(const char *fileName) { Material material = { 0 }; - if (strcmp(GetExtension(fileName), "mtl") == 0) material = LoadMTL(fileName); - else TraceLog(WARNING, "[%s] Material extension not recognized, it can't be loaded", fileName); +#if defined(SUPPORT_FILEFORMAT_MTL) + if (IsFileExtension(fileName, ".mtl")) material = LoadMTL(fileName); +#else + TraceLog(WARNING, "[%s] Material fileformat not supported, it can't be loaded", fileName); +#endif return material; } @@ -736,9 +754,9 @@ static Mesh GenMeshHeightmap(Image heightmap, Vector3 size) Color *pixels = GetImageData(heightmap); // NOTE: One vertex per pixel - int numTriangles = (mapX-1)*(mapZ-1)*2; // One quad every four pixels + int triangleCount = (mapX-1)*(mapZ-1)*2; // One quad every four pixels - mesh.vertexCount = numTriangles*3; + mesh.vertexCount = triangleCount*3; mesh.vertices = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.normals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); @@ -1200,11 +1218,13 @@ void DrawModelEx(Model model, Vector3 position, Vector3 rotationAxis, float rota Matrix matRotation = MatrixRotate(rotationAxis, rotationAngle*DEG2RAD); Matrix matScale = MatrixScale(scale.x, scale.y, scale.z); Matrix matTranslation = MatrixTranslate(position.x, position.y, position.z); + + Matrix matTransform = MatrixMultiply(MatrixMultiply(matScale, matRotation), matTranslation); // Combine model transformation matrix (model.transform) with matrix generated by function parameters (matTransform) //Matrix matModel = MatrixMultiply(model.transform, matTransform); // Transform to world-space coordinates - model.transform = MatrixMultiply(MatrixMultiply(matScale, matRotation), matTranslation); + model.transform = MatrixMultiply(model.transform, matTransform); model.material.colDiffuse = tint; // TODO: Multiply tint color by diffuse color? rlglDrawMesh(model.mesh, model.material, model.transform); @@ -1521,11 +1541,11 @@ RayHitInfo GetCollisionRayTriangle(Ray ray, Vector3 p1, Vector3 p2, Vector3 p3) result.hit = true; result.distance = t; result.hit = true; - result.hitNormal = VectorCrossProduct(edge1, edge2); - VectorNormalize(&result.hitNormal); + result.normal = VectorCrossProduct(edge1, edge2); + VectorNormalize(&result.normal); Vector3 rayDir = ray.direction; VectorScale(&rayDir, t); - result.hitPosition = VectorAdd(ray.position, rayDir); + result.position = VectorAdd(ray.position, rayDir); } return result; @@ -1548,8 +1568,8 @@ RayHitInfo GetCollisionRayGround(Ray ray, float groundHeight) VectorScale(&rayDir, t); result.hit = true; result.distance = t; - result.hitNormal = (Vector3){ 0.0, 1.0, 0.0 }; - result.hitPosition = VectorAdd(ray.position, rayDir); + result.normal = (Vector3){ 0.0, 1.0, 0.0 }; + result.position = VectorAdd(ray.position, rayDir); } } @@ -1588,6 +1608,7 @@ BoundingBox CalculateBoundingBox(Mesh mesh) // Module specific Functions Definition //---------------------------------------------------------------------------------- +#if defined(SUPPORT_FILEFORMAT_OBJ) // Load OBJ mesh data static Mesh LoadOBJ(const char *fileName) { @@ -1596,10 +1617,10 @@ static Mesh LoadOBJ(const char *fileName) char dataType; char comments[200]; - int numVertex = 0; - int numNormals = 0; - int numTexCoords = 0; - int numTriangles = 0; + int vertexCount = 0; + int normalCount = 0; + int texcoordCount = 0; + int triangleCount = 0; FILE *objFile; @@ -1611,7 +1632,7 @@ static Mesh LoadOBJ(const char *fileName) return mesh; } - // First reading pass: Get numVertex, numNormals, numTexCoords, numTriangles + // First reading pass: Get vertexCount, normalCount, texcoordCount, triangleCount // NOTE: vertex, texcoords and normals could be optimized (to be used indexed on faces definition) // NOTE: faces MUST be defined as TRIANGLES (3 vertex per face) while (!feof(objFile)) @@ -1635,40 +1656,40 @@ static Mesh LoadOBJ(const char *fileName) if (dataType == 't') // Read texCoord { - numTexCoords++; + texcoordCount++; fgets(comments, 200, objFile); } else if (dataType == 'n') // Read normals { - numNormals++; + normalCount++; fgets(comments, 200, objFile); } else // Read vertex { - numVertex++; + vertexCount++; fgets(comments, 200, objFile); } } break; case 'f': { - numTriangles++; + triangleCount++; fgets(comments, 200, objFile); } break; default: break; } } - TraceLog(DEBUG, "[%s] Model num vertices: %i", fileName, numVertex); - TraceLog(DEBUG, "[%s] Model num texcoords: %i", fileName, numTexCoords); - TraceLog(DEBUG, "[%s] Model num normals: %i", fileName, numNormals); - TraceLog(DEBUG, "[%s] Model num triangles: %i", fileName, numTriangles); + TraceLog(DEBUG, "[%s] Model vertices: %i", fileName, vertexCount); + TraceLog(DEBUG, "[%s] Model texcoords: %i", fileName, texcoordCount); + TraceLog(DEBUG, "[%s] Model normals: %i", fileName, normalCount); + TraceLog(DEBUG, "[%s] Model triangles: %i", fileName, triangleCount); // Once we know the number of vertices to store, we create required arrays - Vector3 *midVertices = (Vector3 *)malloc(numVertex*sizeof(Vector3)); + Vector3 *midVertices = (Vector3 *)malloc(vertexCount*sizeof(Vector3)); Vector3 *midNormals = NULL; - if (numNormals > 0) midNormals = (Vector3 *)malloc(numNormals*sizeof(Vector3)); + if (normalCount > 0) midNormals = (Vector3 *)malloc(normalCount*sizeof(Vector3)); Vector2 *midTexCoords = NULL; - if (numTexCoords > 0) midTexCoords = (Vector2 *)malloc(numTexCoords*sizeof(Vector2)); + if (texcoordCount > 0) midTexCoords = (Vector2 *)malloc(texcoordCount*sizeof(Vector2)); int countVertex = 0; int countNormals = 0; @@ -1719,7 +1740,7 @@ static Mesh LoadOBJ(const char *fileName) // At this point all vertex data (v, vt, vn) has been gathered on midVertices, midTexCoords, midNormals // Now we can organize that data into our Mesh struct - mesh.vertexCount = numTriangles*3; + mesh.vertexCount = triangleCount*3; // Additional arrays to store vertex data as floats mesh.vertices = (float *)malloc(mesh.vertexCount*3*sizeof(float)); @@ -1731,11 +1752,11 @@ static Mesh LoadOBJ(const char *fileName) int tcCounter = 0; // Used to count texcoords float by float int nCounter = 0; // Used to count normals float by float - int vNum[3], vtNum[3], vnNum[3]; // Used to store triangle indices for v, vt, vn + int vCount[3], vtCount[3], vnCount[3]; // Used to store triangle indices for v, vt, vn rewind(objFile); // Return to the beginning of the file, to read again - if (numNormals == 0) TraceLog(INFO, "[%s] No normals data on OBJ, normals will be generated from faces data", fileName); + if (normalCount == 0) TraceLog(INFO, "[%s] No normals data on OBJ, normals will be generated from faces data", fileName); // Third reading pass: Get faces (triangles) data and fill VertexArray while (!feof(objFile)) @@ -1749,43 +1770,43 @@ static Mesh LoadOBJ(const char *fileName) { // NOTE: It could be that OBJ does not have normals or texcoords defined! - if ((numNormals == 0) && (numTexCoords == 0)) fscanf(objFile, "%i %i %i", &vNum[0], &vNum[1], &vNum[2]); - else if (numNormals == 0) fscanf(objFile, "%i/%i %i/%i %i/%i", &vNum[0], &vtNum[0], &vNum[1], &vtNum[1], &vNum[2], &vtNum[2]); - else if (numTexCoords == 0) fscanf(objFile, "%i//%i %i//%i %i//%i", &vNum[0], &vnNum[0], &vNum[1], &vnNum[1], &vNum[2], &vnNum[2]); - else fscanf(objFile, "%i/%i/%i %i/%i/%i %i/%i/%i", &vNum[0], &vtNum[0], &vnNum[0], &vNum[1], &vtNum[1], &vnNum[1], &vNum[2], &vtNum[2], &vnNum[2]); + if ((normalCount == 0) && (texcoordCount == 0)) fscanf(objFile, "%i %i %i", &vCount[0], &vCount[1], &vCount[2]); + else if (normalCount == 0) fscanf(objFile, "%i/%i %i/%i %i/%i", &vCount[0], &vtCount[0], &vCount[1], &vtCount[1], &vCount[2], &vtCount[2]); + else if (texcoordCount == 0) fscanf(objFile, "%i//%i %i//%i %i//%i", &vCount[0], &vnCount[0], &vCount[1], &vnCount[1], &vCount[2], &vnCount[2]); + else fscanf(objFile, "%i/%i/%i %i/%i/%i %i/%i/%i", &vCount[0], &vtCount[0], &vnCount[0], &vCount[1], &vtCount[1], &vnCount[1], &vCount[2], &vtCount[2], &vnCount[2]); - mesh.vertices[vCounter] = midVertices[vNum[0]-1].x; - mesh.vertices[vCounter + 1] = midVertices[vNum[0]-1].y; - mesh.vertices[vCounter + 2] = midVertices[vNum[0]-1].z; + mesh.vertices[vCounter] = midVertices[vCount[0]-1].x; + mesh.vertices[vCounter + 1] = midVertices[vCount[0]-1].y; + mesh.vertices[vCounter + 2] = midVertices[vCount[0]-1].z; vCounter += 3; - mesh.vertices[vCounter] = midVertices[vNum[1]-1].x; - mesh.vertices[vCounter + 1] = midVertices[vNum[1]-1].y; - mesh.vertices[vCounter + 2] = midVertices[vNum[1]-1].z; + mesh.vertices[vCounter] = midVertices[vCount[1]-1].x; + mesh.vertices[vCounter + 1] = midVertices[vCount[1]-1].y; + mesh.vertices[vCounter + 2] = midVertices[vCount[1]-1].z; vCounter += 3; - mesh.vertices[vCounter] = midVertices[vNum[2]-1].x; - mesh.vertices[vCounter + 1] = midVertices[vNum[2]-1].y; - mesh.vertices[vCounter + 2] = midVertices[vNum[2]-1].z; + mesh.vertices[vCounter] = midVertices[vCount[2]-1].x; + mesh.vertices[vCounter + 1] = midVertices[vCount[2]-1].y; + mesh.vertices[vCounter + 2] = midVertices[vCount[2]-1].z; vCounter += 3; - if (numNormals > 0) + if (normalCount > 0) { - mesh.normals[nCounter] = midNormals[vnNum[0]-1].x; - mesh.normals[nCounter + 1] = midNormals[vnNum[0]-1].y; - mesh.normals[nCounter + 2] = midNormals[vnNum[0]-1].z; + mesh.normals[nCounter] = midNormals[vnCount[0]-1].x; + mesh.normals[nCounter + 1] = midNormals[vnCount[0]-1].y; + mesh.normals[nCounter + 2] = midNormals[vnCount[0]-1].z; nCounter += 3; - mesh.normals[nCounter] = midNormals[vnNum[1]-1].x; - mesh.normals[nCounter + 1] = midNormals[vnNum[1]-1].y; - mesh.normals[nCounter + 2] = midNormals[vnNum[1]-1].z; + mesh.normals[nCounter] = midNormals[vnCount[1]-1].x; + mesh.normals[nCounter + 1] = midNormals[vnCount[1]-1].y; + mesh.normals[nCounter + 2] = midNormals[vnCount[1]-1].z; nCounter += 3; - mesh.normals[nCounter] = midNormals[vnNum[2]-1].x; - mesh.normals[nCounter + 1] = midNormals[vnNum[2]-1].y; - mesh.normals[nCounter + 2] = midNormals[vnNum[2]-1].z; + mesh.normals[nCounter] = midNormals[vnCount[2]-1].x; + mesh.normals[nCounter + 1] = midNormals[vnCount[2]-1].y; + mesh.normals[nCounter + 2] = midNormals[vnCount[2]-1].z; nCounter += 3; } else { // If normals not defined, they are calculated from the 3 vertices [N = (V2 - V1) x (V3 - V1)] - Vector3 norm = VectorCrossProduct(VectorSubtract(midVertices[vNum[1]-1], midVertices[vNum[0]-1]), VectorSubtract(midVertices[vNum[2]-1], midVertices[vNum[0]-1])); + Vector3 norm = VectorCrossProduct(VectorSubtract(midVertices[vCount[1]-1], midVertices[vCount[0]-1]), VectorSubtract(midVertices[vCount[2]-1], midVertices[vCount[0]-1])); VectorNormalize(&norm); mesh.normals[nCounter] = norm.x; @@ -1802,18 +1823,18 @@ static Mesh LoadOBJ(const char *fileName) nCounter += 3; } - if (numTexCoords > 0) + if (texcoordCount > 0) { // NOTE: If using negative texture coordinates with a texture filter of GL_CLAMP_TO_EDGE doesn't work! // NOTE: Texture coordinates are Y flipped upside-down - mesh.texcoords[tcCounter] = midTexCoords[vtNum[0]-1].x; - mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtNum[0]-1].y; + mesh.texcoords[tcCounter] = midTexCoords[vtCount[0]-1].x; + mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[0]-1].y; tcCounter += 2; - mesh.texcoords[tcCounter] = midTexCoords[vtNum[1]-1].x; - mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtNum[1]-1].y; + mesh.texcoords[tcCounter] = midTexCoords[vtCount[1]-1].x; + mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[1]-1].y; tcCounter += 2; - mesh.texcoords[tcCounter] = midTexCoords[vtNum[2]-1].x; - mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtNum[2]-1].y; + mesh.texcoords[tcCounter] = midTexCoords[vtCount[2]-1].x; + mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[2]-1].y; tcCounter += 2; } } break; @@ -1824,7 +1845,77 @@ static Mesh LoadOBJ(const char *fileName) fclose(objFile); // Security check, just in case no normals or no texcoords defined in OBJ - if (numTexCoords == 0) for (int i = 0; i < (2*mesh.vertexCount); i++) mesh.texcoords[i] = 0.0f; + if (texcoordCount == 0) for (int i = 0; i < (2*mesh.vertexCount); i++) mesh.texcoords[i] = 0.0f; + else + { + // Attempt to calculate mesh tangents and binormals using positions and texture coordinates + mesh.tangents = (float *)malloc(mesh.vertexCount*3*sizeof(float)); + // mesh.binormals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); + + int vCount = 0; + int uvCount = 0; + while (vCount < mesh.vertexCount*3) + { + // Calculate mesh vertex positions as Vector3 + Vector3 v0 = { mesh.vertices[vCount], mesh.vertices[vCount + 1], mesh.vertices[vCount + 2] }; + Vector3 v1 = { mesh.vertices[vCount + 3], mesh.vertices[vCount + 4], mesh.vertices[vCount + 5] }; + Vector3 v2 = { mesh.vertices[vCount + 6], mesh.vertices[vCount + 7], mesh.vertices[vCount + 8] }; + + // Calculate mesh texture coordinates as Vector2 + Vector2 uv0 = { mesh.texcoords[uvCount + 0], mesh.texcoords[uvCount + 1] }; + Vector2 uv1 = { mesh.texcoords[uvCount + 2], mesh.texcoords[uvCount + 3] }; + Vector2 uv2 = { mesh.texcoords[uvCount + 4], mesh.texcoords[uvCount + 5] }; + + // Calculate edges of the triangle (position delta) + Vector3 deltaPos1 = VectorSubtract(v1, v0); + Vector3 deltaPos2 = VectorSubtract(v2, v0); + + // UV delta + Vector2 deltaUV1 = { uv1.x - uv0.x, uv1.y - uv0.y }; + Vector2 deltaUV2 = { uv2.x - uv0.x, uv2.y - uv0.y }; + + float r = 1.0f/(deltaUV1.x*deltaUV2.y - deltaUV1.y*deltaUV2.x); + Vector3 t1 = { deltaPos1.x*deltaUV2.y, deltaPos1.y*deltaUV2.y, deltaPos1.z*deltaUV2.y }; + Vector3 t2 = { deltaPos2.x*deltaUV1.y, deltaPos2.y*deltaUV1.y, deltaPos2.z*deltaUV1.y }; + // Vector3 b1 = { deltaPos2.x*deltaUV1.x, deltaPos2.y*deltaUV1.x, deltaPos2.z*deltaUV1.x }; + // Vector3 b2 = { deltaPos1.x*deltaUV2.x, deltaPos1.y*deltaUV2.x, deltaPos1.z*deltaUV2.x }; + + // Calculate vertex tangent + Vector3 tangent = VectorSubtract(t1, t2); + VectorScale(&tangent, r); + + // Apply calculated tangents data to mesh struct + mesh.tangents[vCount + 0] = tangent.x; + mesh.tangents[vCount + 1] = tangent.y; + mesh.tangents[vCount + 2] = tangent.z; + mesh.tangents[vCount + 3] = tangent.x; + mesh.tangents[vCount + 4] = tangent.y; + mesh.tangents[vCount + 5] = tangent.z; + mesh.tangents[vCount + 6] = tangent.x; + mesh.tangents[vCount + 7] = tangent.y; + mesh.tangents[vCount + 8] = tangent.z; + + // TODO: add binormals to mesh struct and assign buffers id and locations properly + /* // Calculate vertex binormal + Vector3 binormal = VectorSubtract(b1, b2); + VectorScale(&binormal, r); + + // Apply calculated binormals data to mesh struct + mesh.binormals[vCount + 0] = binormal.x; + mesh.binormals[vCount + 1] = binormal.y; + mesh.binormals[vCount + 2] = binormal.z; + mesh.binormals[vCount + 3] = binormal.x; + mesh.binormals[vCount + 4] = binormal.y; + mesh.binormals[vCount + 5] = binormal.z; + mesh.binormals[vCount + 6] = binormal.x; + mesh.binormals[vCount + 7] = binormal.y; + mesh.binormals[vCount + 8] = binormal.z; */ + + // Update vertex position and texture coordinates counters + vCount += 9; + uvCount += 6; + } + } // Now we can free temp mid* arrays free(midVertices); @@ -1836,7 +1927,9 @@ static Mesh LoadOBJ(const char *fileName) return mesh; } +#endif +#if defined(SUPPORT_FILEFORMAT_MTL) // Load MTL material data (specs: http://paulbourke.net/dataformats/mtl/) // NOTE: Texture map parameters are not supported static Material LoadMTL(const char *fileName) @@ -2000,3 +2093,4 @@ static Material LoadMTL(const char *fileName) return material; } +#endif |