| #include <cassert> |
| #include <cmath> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <iostream> |
| #include <limits> |
| #include <string> |
| #include <vector> |
| |
| #include <GL/glew.h> |
| |
| #define GLFW_INCLUDE_GLU |
| #include <GLFW/glfw3.h> |
| |
| #include "trackball.h" |
| |
| #define TINYGLTF_IMPLEMENTATION |
| #define STB_IMAGE_IMPLEMENTATION |
| #include "tiny_gltf.h" |
| |
| #define BUFFER_OFFSET(i) ((char *)NULL + (i)) |
| |
| #define CheckGLErrors(desc) \ |
| { \ |
| GLenum e = glGetError(); \ |
| if (e != GL_NO_ERROR) { \ |
| printf("OpenGL error in \"%s\": %d (%d) %s:%d\n", desc, e, e, __FILE__, \ |
| __LINE__); \ |
| exit(20); \ |
| } \ |
| } |
| |
| #define CAM_Z (3.0f) |
| int width = 768; |
| int height = 768; |
| |
| double prevMouseX, prevMouseY; |
| bool mouseLeftPressed; |
| bool mouseMiddlePressed; |
| bool mouseRightPressed; |
| float curr_quat[4]; |
| float prev_quat[4]; |
| float eye[3], lookat[3], up[3]; |
| |
| GLFWwindow *window; |
| |
| typedef struct { GLuint vb; } GLBufferState; |
| |
| typedef struct { |
| std::vector<GLuint> diffuseTex; // for each primitive in mesh |
| } GLMeshState; |
| |
| typedef struct { |
| std::map<std::string, GLint> attribs; |
| std::map<std::string, GLint> uniforms; |
| } GLProgramState; |
| |
| typedef struct { |
| GLuint vb; // vertex buffer |
| size_t count; // byte count |
| } GLCurvesState; |
| |
| std::map<int, GLBufferState> gBufferState; |
| std::map<std::string, GLMeshState> gMeshState; |
| std::map<int, GLCurvesState> gCurvesMesh; |
| GLProgramState gGLProgramState; |
| |
| void CheckErrors(std::string desc) { |
| GLenum e = glGetError(); |
| if (e != GL_NO_ERROR) { |
| fprintf(stderr, "OpenGL error in \"%s\": %d (%d)\n", desc.c_str(), e, e); |
| exit(20); |
| } |
| } |
| |
| static std::string GetFilePathExtension(const std::string &FileName) { |
| if (FileName.find_last_of(".") != std::string::npos) |
| return FileName.substr(FileName.find_last_of(".") + 1); |
| return ""; |
| } |
| |
| bool LoadShader(GLenum shaderType, // GL_VERTEX_SHADER or GL_FRAGMENT_SHADER(or |
| // maybe GL_COMPUTE_SHADER) |
| GLuint &shader, const char *shaderSourceFilename) { |
| GLint val = 0; |
| |
| // free old shader/program |
| if (shader != 0) { |
| glDeleteShader(shader); |
| } |
| |
| std::vector<GLchar> srcbuf; |
| FILE *fp = fopen(shaderSourceFilename, "rb"); |
| if (!fp) { |
| fprintf(stderr, "failed to load shader: %s\n", shaderSourceFilename); |
| return false; |
| } |
| fseek(fp, 0, SEEK_END); |
| size_t len = ftell(fp); |
| rewind(fp); |
| srcbuf.resize(len + 1); |
| len = fread(&srcbuf.at(0), 1, len, fp); |
| srcbuf[len] = 0; |
| fclose(fp); |
| |
| const GLchar *srcs[1]; |
| srcs[0] = &srcbuf.at(0); |
| |
| shader = glCreateShader(shaderType); |
| glShaderSource(shader, 1, srcs, NULL); |
| glCompileShader(shader); |
| glGetShaderiv(shader, GL_COMPILE_STATUS, &val); |
| if (val != GL_TRUE) { |
| char log[4096]; |
| GLsizei msglen; |
| glGetShaderInfoLog(shader, 4096, &msglen, log); |
| printf("%s\n", log); |
| // assert(val == GL_TRUE && "failed to compile shader"); |
| printf("ERR: Failed to load or compile shader [ %s ]\n", |
| shaderSourceFilename); |
| return false; |
| } |
| |
| printf("Load shader [ %s ] OK\n", shaderSourceFilename); |
| return true; |
| } |
| |
| bool LinkShader(GLuint &prog, GLuint &vertShader, GLuint &fragShader) { |
| GLint val = 0; |
| |
| if (prog != 0) { |
| glDeleteProgram(prog); |
| } |
| |
| prog = glCreateProgram(); |
| |
| glAttachShader(prog, vertShader); |
| glAttachShader(prog, fragShader); |
| glLinkProgram(prog); |
| |
| glGetProgramiv(prog, GL_LINK_STATUS, &val); |
| assert(val == GL_TRUE && "failed to link shader"); |
| |
| printf("Link shader OK\n"); |
| |
| return true; |
| } |
| |
| void reshapeFunc(GLFWwindow *window, int w, int h) { |
| (void)window; |
| int fb_w, fb_h; |
| glfwGetFramebufferSize(window, &fb_w, &fb_h); |
| glViewport(0, 0, fb_w, fb_h); |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| gluPerspective(45.0, (float)w / (float)h, 0.1f, 1000.0f); |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| |
| width = w; |
| height = h; |
| } |
| |
| void keyboardFunc(GLFWwindow *window, int key, int scancode, int action, |
| int mods) { |
| (void)scancode; |
| (void)mods; |
| if (action == GLFW_PRESS || action == GLFW_REPEAT) { |
| // Close window |
| if (key == GLFW_KEY_Q || key == GLFW_KEY_ESCAPE) { |
| glfwSetWindowShouldClose(window, GL_TRUE); |
| } |
| } |
| } |
| |
| void clickFunc(GLFWwindow *window, int button, int action, int mods) { |
| double x, y; |
| glfwGetCursorPos(window, &x, &y); |
| |
| bool shiftPressed = (mods & GLFW_MOD_SHIFT); |
| bool ctrlPressed = (mods & GLFW_MOD_CONTROL); |
| |
| if ((button == GLFW_MOUSE_BUTTON_LEFT) && (!shiftPressed) && (!ctrlPressed)) { |
| mouseLeftPressed = true; |
| mouseMiddlePressed = false; |
| mouseRightPressed = false; |
| if (action == GLFW_PRESS) { |
| int id = -1; |
| // int id = ui.Proc(x, y); |
| if (id < 0) { // outside of UI |
| trackball(prev_quat, 0.0, 0.0, 0.0, 0.0); |
| } |
| } else if (action == GLFW_RELEASE) { |
| mouseLeftPressed = false; |
| } |
| } |
| if ((button == GLFW_MOUSE_BUTTON_RIGHT) || |
| ((button == GLFW_MOUSE_BUTTON_LEFT) && ctrlPressed)) { |
| if (action == GLFW_PRESS) { |
| mouseRightPressed = true; |
| mouseLeftPressed = false; |
| mouseMiddlePressed = false; |
| } else if (action == GLFW_RELEASE) { |
| mouseRightPressed = false; |
| } |
| } |
| if ((button == GLFW_MOUSE_BUTTON_MIDDLE) || |
| ((button == GLFW_MOUSE_BUTTON_LEFT) && shiftPressed)) { |
| if (action == GLFW_PRESS) { |
| mouseMiddlePressed = true; |
| mouseLeftPressed = false; |
| mouseRightPressed = false; |
| } else if (action == GLFW_RELEASE) { |
| mouseMiddlePressed = false; |
| } |
| } |
| } |
| |
| void motionFunc(GLFWwindow *window, double mouse_x, double mouse_y) { |
| (void)window; |
| float rotScale = 1.0f; |
| float transScale = 2.0f; |
| |
| if (mouseLeftPressed) { |
| trackball(prev_quat, rotScale * (2.0f * prevMouseX - width) / (float)width, |
| rotScale * (height - 2.0f * prevMouseY) / (float)height, |
| rotScale * (2.0f * mouse_x - width) / (float)width, |
| rotScale * (height - 2.0f * mouse_y) / (float)height); |
| |
| add_quats(prev_quat, curr_quat, curr_quat); |
| } else if (mouseMiddlePressed) { |
| eye[0] += -transScale * (mouse_x - prevMouseX) / (float)width; |
| lookat[0] += -transScale * (mouse_x - prevMouseX) / (float)width; |
| eye[1] += transScale * (mouse_y - prevMouseY) / (float)height; |
| lookat[1] += transScale * (mouse_y - prevMouseY) / (float)height; |
| } else if (mouseRightPressed) { |
| eye[2] += transScale * (mouse_y - prevMouseY) / (float)height; |
| lookat[2] += transScale * (mouse_y - prevMouseY) / (float)height; |
| } |
| |
| // Update mouse point |
| prevMouseX = mouse_x; |
| prevMouseY = mouse_y; |
| } |
| |
| static void SetupMeshState(tinygltf::Model &model, GLuint progId) { |
| // Buffer |
| { |
| for (size_t i = 0; i < model.bufferViews.size(); i++) { |
| const tinygltf::BufferView &bufferView = model.bufferViews[i]; |
| if (bufferView.target == 0) { |
| std::cout << "WARN: bufferView.target is zero" << std::endl; |
| continue; // Unsupported bufferView. |
| } |
| |
| const tinygltf::Buffer &buffer = model.buffers[bufferView.buffer]; |
| GLBufferState state; |
| glGenBuffers(1, &state.vb); |
| glBindBuffer(bufferView.target, state.vb); |
| std::cout << "buffer.size= " << buffer.data.size() |
| << ", byteOffset = " << bufferView.byteOffset << std::endl; |
| glBufferData(bufferView.target, bufferView.byteLength, |
| &buffer.data.at(0) + bufferView.byteOffset, GL_STATIC_DRAW); |
| glBindBuffer(bufferView.target, 0); |
| |
| gBufferState[i] = state; |
| } |
| } |
| |
| #if 0 // TODO(syoyo): Implement |
| // Texture |
| { |
| for (size_t i = 0; i < model.meshes.size(); i++) { |
| const tinygltf::Mesh &mesh = model.meshes[i]; |
| |
| gMeshState[mesh.name].diffuseTex.resize(mesh.primitives.size()); |
| for (size_t primId = 0; primId < mesh.primitives.size(); primId++) { |
| const tinygltf::Primitive &primitive = mesh.primitives[primId]; |
| |
| gMeshState[mesh.name].diffuseTex[primId] = 0; |
| |
| if (primitive.material < 0) { |
| continue; |
| } |
| tinygltf::Material &mat = model.materials[primitive.material]; |
| // printf("material.name = %s\n", mat.name.c_str()); |
| if (mat.values.find("diffuse") != mat.values.end()) { |
| std::string diffuseTexName = mat.values["diffuse"].string_value; |
| if (model.textures.find(diffuseTexName) != model.textures.end()) { |
| tinygltf::Texture &tex = model.textures[diffuseTexName]; |
| if (scene.images.find(tex.source) != model.images.end()) { |
| tinygltf::Image &image = model.images[tex.source]; |
| GLuint texId; |
| glGenTextures(1, &texId); |
| glBindTexture(tex.target, texId); |
| glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| glTexParameterf(tex.target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| glTexParameterf(tex.target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| |
| // Ignore Texture.fomat. |
| GLenum format = GL_RGBA; |
| if (image.component == 3) { |
| format = GL_RGB; |
| } |
| glTexImage2D(tex.target, 0, tex.internalFormat, image.width, |
| image.height, 0, format, tex.type, |
| &image.image.at(0)); |
| |
| CheckErrors("texImage2D"); |
| glBindTexture(tex.target, 0); |
| |
| printf("TexId = %d\n", texId); |
| gMeshState[mesh.name].diffuseTex[primId] = texId; |
| } |
| } |
| } |
| } |
| } |
| } |
| #endif |
| |
| glUseProgram(progId); |
| GLint vtloc = glGetAttribLocation(progId, "in_vertex"); |
| GLint nrmloc = glGetAttribLocation(progId, "in_normal"); |
| GLint uvloc = glGetAttribLocation(progId, "in_texcoord"); |
| |
| // GLint diffuseTexLoc = glGetUniformLocation(progId, "diffuseTex"); |
| GLint isCurvesLoc = glGetUniformLocation(progId, "uIsCurves"); |
| |
| gGLProgramState.attribs["POSITION"] = vtloc; |
| gGLProgramState.attribs["NORMAL"] = nrmloc; |
| gGLProgramState.attribs["TEXCOORD_0"] = uvloc; |
| // gGLProgramState.uniforms["diffuseTex"] = diffuseTexLoc; |
| gGLProgramState.uniforms["isCurvesLoc"] = isCurvesLoc; |
| }; |
| |
| #if 0 // TODO(syoyo): Implement |
| // Setup curves geometry extension |
| static void SetupCurvesState(tinygltf::Scene &scene, GLuint progId) { |
| // Find curves primitive. |
| { |
| std::map<std::string, tinygltf::Mesh>::const_iterator it( |
| scene.meshes.begin()); |
| std::map<std::string, tinygltf::Mesh>::const_iterator itEnd( |
| scene.meshes.end()); |
| |
| for (; it != itEnd; it++) { |
| const tinygltf::Mesh &mesh = it->second; |
| |
| // Currently we only support one primitive per mesh. |
| if (mesh.primitives.size() > 1) { |
| continue; |
| } |
| |
| for (size_t primId = 0; primId < mesh.primitives.size(); primId++) { |
| const tinygltf::Primitive &primitive = mesh.primitives[primId]; |
| |
| gMeshState[mesh.name].diffuseTex[primId] = 0; |
| |
| if (primitive.material.empty()) { |
| continue; |
| } |
| |
| bool has_curves = false; |
| if (primitive.extras.IsObject()) { |
| if (primitive.extras.Has("ext_mode")) { |
| const tinygltf::Value::Object &o = |
| primitive.extras.Get<tinygltf::Value::Object>(); |
| const tinygltf::Value &ext_mode = o.find("ext_mode")->second; |
| |
| if (ext_mode.IsString()) { |
| const std::string &str = ext_mode.Get<std::string>(); |
| if (str.compare("curves") == 0) { |
| has_curves = true; |
| } |
| } |
| } |
| } |
| |
| if (!has_curves) { |
| continue; |
| } |
| |
| // Construct curves buffer |
| const tinygltf::Accessor &vtx_accessor = |
| scene.accessors[primitive.attributes.find("POSITION")->second]; |
| const tinygltf::Accessor &nverts_accessor = |
| scene.accessors[primitive.attributes.find("NVERTS")->second]; |
| const tinygltf::BufferView &vtx_bufferView = |
| scene.bufferViews[vtx_accessor.bufferView]; |
| const tinygltf::BufferView &nverts_bufferView = |
| scene.bufferViews[nverts_accessor.bufferView]; |
| const tinygltf::Buffer &vtx_buffer = |
| scene.buffers[vtx_bufferView.buffer]; |
| const tinygltf::Buffer &nverts_buffer = |
| scene.buffers[nverts_bufferView.buffer]; |
| |
| // std::cout << "vtx_bufferView = " << vtx_accessor.bufferView << |
| // std::endl; |
| // std::cout << "nverts_bufferView = " << nverts_accessor.bufferView << |
| // std::endl; |
| // std::cout << "vtx_buffer.size = " << vtx_buffer.data.size() << |
| // std::endl; |
| // std::cout << "nverts_buffer.size = " << nverts_buffer.data.size() << |
| // std::endl; |
| |
| const int *nverts = |
| reinterpret_cast<const int *>(nverts_buffer.data.data()); |
| const float *vtx = |
| reinterpret_cast<const float *>(vtx_buffer.data.data()); |
| |
| // Convert to GL_LINES data. |
| std::vector<float> line_pts; |
| size_t vtx_offset = 0; |
| for (int k = 0; k < static_cast<int>(nverts_accessor.count); k++) { |
| for (int n = 0; n < nverts[k] - 1; n++) { |
| |
| line_pts.push_back(vtx[3 * (vtx_offset + n) + 0]); |
| line_pts.push_back(vtx[3 * (vtx_offset + n) + 1]); |
| line_pts.push_back(vtx[3 * (vtx_offset + n) + 2]); |
| |
| line_pts.push_back(vtx[3 * (vtx_offset + n + 1) + 0]); |
| line_pts.push_back(vtx[3 * (vtx_offset + n + 1) + 1]); |
| line_pts.push_back(vtx[3 * (vtx_offset + n + 1) + 2]); |
| |
| // std::cout << "p0 " << vtx[3 * (vtx_offset + n) + 0] << ", " |
| // << vtx[3 * (vtx_offset + n) + 1] << ", " |
| // << vtx[3 * (vtx_offset + n) + 2] << std::endl; |
| |
| // std::cout << "p1 " << vtx[3 * (vtx_offset + n+1) + 0] << ", " |
| // << vtx[3 * (vtx_offset + n+1) + 1] << ", " |
| // << vtx[3 * (vtx_offset + n+1) + 2] << std::endl; |
| } |
| |
| vtx_offset += nverts[k]; |
| } |
| |
| GLCurvesState state; |
| glGenBuffers(1, &state.vb); |
| glBindBuffer(GL_ARRAY_BUFFER, state.vb); |
| glBufferData(GL_ARRAY_BUFFER, line_pts.size() * sizeof(float), |
| line_pts.data(), GL_STATIC_DRAW); |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| |
| state.count = line_pts.size() / 3; |
| gCurvesMesh[mesh.name] = state; |
| |
| // Material |
| tinygltf::Material &mat = scene.materials[primitive.material]; |
| // printf("material.name = %s\n", mat.name.c_str()); |
| if (mat.values.find("diffuse") != mat.values.end()) { |
| std::string diffuseTexName = mat.values["diffuse"].string_value; |
| if (scene.textures.find(diffuseTexName) != scene.textures.end()) { |
| tinygltf::Texture &tex = scene.textures[diffuseTexName]; |
| if (scene.images.find(tex.source) != scene.images.end()) { |
| tinygltf::Image &image = scene.images[tex.source]; |
| GLuint texId; |
| glGenTextures(1, &texId); |
| glBindTexture(tex.target, texId); |
| glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| glTexParameterf(tex.target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| glTexParameterf(tex.target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| |
| // Ignore Texture.fomat. |
| GLenum format = GL_RGBA; |
| if (image.component == 3) { |
| format = GL_RGB; |
| } |
| glTexImage2D(tex.target, 0, tex.internalFormat, image.width, |
| image.height, 0, format, tex.type, |
| &image.image.at(0)); |
| |
| CheckErrors("texImage2D"); |
| glBindTexture(tex.target, 0); |
| |
| printf("TexId = %d\n", texId); |
| gMeshState[mesh.name].diffuseTex[primId] = texId; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| glUseProgram(progId); |
| GLint vtloc = glGetAttribLocation(progId, "in_vertex"); |
| GLint nrmloc = glGetAttribLocation(progId, "in_normal"); |
| GLint uvloc = glGetAttribLocation(progId, "in_texcoord"); |
| |
| GLint diffuseTexLoc = glGetUniformLocation(progId, "diffuseTex"); |
| GLint isCurvesLoc = glGetUniformLocation(progId, "uIsCurves"); |
| |
| gGLProgramState.attribs["POSITION"] = vtloc; |
| gGLProgramState.attribs["NORMAL"] = nrmloc; |
| gGLProgramState.attribs["TEXCOORD_0"] = uvloc; |
| gGLProgramState.uniforms["diffuseTex"] = diffuseTexLoc; |
| gGLProgramState.uniforms["uIsCurves"] = isCurvesLoc; |
| }; |
| #endif |
| |
| static void DrawMesh(tinygltf::Model &model, const tinygltf::Mesh &mesh) { |
| //// Skip curves primitive. |
| // if (gCurvesMesh.find(mesh.name) != gCurvesMesh.end()) { |
| // return; |
| //} |
| |
| // if (gGLProgramState.uniforms["diffuseTex"] >= 0) { |
| // glUniform1i(gGLProgramState.uniforms["diffuseTex"], 0); // TEXTURE0 |
| //} |
| |
| if (gGLProgramState.uniforms["isCurvesLoc"] >= 0) { |
| glUniform1i(gGLProgramState.uniforms["isCurvesLoc"], 0); |
| } |
| |
| for (size_t i = 0; i < mesh.primitives.size(); i++) { |
| const tinygltf::Primitive &primitive = mesh.primitives[i]; |
| |
| if (primitive.indices < 0) return; |
| |
| // Assume TEXTURE_2D target for the texture object. |
| // glBindTexture(GL_TEXTURE_2D, gMeshState[mesh.name].diffuseTex[i]); |
| |
| std::map<std::string, int>::const_iterator it(primitive.attributes.begin()); |
| std::map<std::string, int>::const_iterator itEnd( |
| primitive.attributes.end()); |
| |
| for (; it != itEnd; it++) { |
| assert(it->second >= 0); |
| const tinygltf::Accessor &accessor = model.accessors[it->second]; |
| glBindBuffer(GL_ARRAY_BUFFER, gBufferState[accessor.bufferView].vb); |
| CheckErrors("bind buffer"); |
| int size = 1; |
| if (accessor.type == TINYGLTF_TYPE_SCALAR) { |
| size = 1; |
| } else if (accessor.type == TINYGLTF_TYPE_VEC2) { |
| size = 2; |
| } else if (accessor.type == TINYGLTF_TYPE_VEC3) { |
| size = 3; |
| } else if (accessor.type == TINYGLTF_TYPE_VEC4) { |
| size = 4; |
| } else { |
| assert(0); |
| } |
| // it->first would be "POSITION", "NORMAL", "TEXCOORD_0", ... |
| if ((it->first.compare("POSITION") == 0) || |
| (it->first.compare("NORMAL") == 0) || |
| (it->first.compare("TEXCOORD_0") == 0)) { |
| if (gGLProgramState.attribs[it->first] >= 0) { |
| // Compute byteStride from Accessor + BufferView combination. |
| int byteStride = accessor.ByteStride(model.bufferViews[accessor.bufferView]); |
| assert(byteStride != -1); |
| glVertexAttribPointer(gGLProgramState.attribs[it->first], size, |
| accessor.componentType, accessor.normalized ? GL_TRUE : GL_FALSE, |
| byteStride, |
| BUFFER_OFFSET(accessor.byteOffset)); |
| CheckErrors("vertex attrib pointer"); |
| glEnableVertexAttribArray(gGLProgramState.attribs[it->first]); |
| CheckErrors("enable vertex attrib array"); |
| } |
| } |
| } |
| |
| const tinygltf::Accessor &indexAccessor = |
| model.accessors[primitive.indices]; |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, |
| gBufferState[indexAccessor.bufferView].vb); |
| CheckErrors("bind buffer"); |
| int mode = -1; |
| if (primitive.mode == TINYGLTF_MODE_TRIANGLES) { |
| mode = GL_TRIANGLES; |
| } else if (primitive.mode == TINYGLTF_MODE_TRIANGLE_STRIP) { |
| mode = GL_TRIANGLE_STRIP; |
| } else if (primitive.mode == TINYGLTF_MODE_TRIANGLE_FAN) { |
| mode = GL_TRIANGLE_FAN; |
| } else if (primitive.mode == TINYGLTF_MODE_POINTS) { |
| mode = GL_POINTS; |
| } else if (primitive.mode == TINYGLTF_MODE_LINE) { |
| mode = GL_LINES; |
| } else if (primitive.mode == TINYGLTF_MODE_LINE_LOOP) { |
| mode = GL_LINE_LOOP; |
| } else { |
| assert(0); |
| } |
| glDrawElements(mode, indexAccessor.count, indexAccessor.componentType, |
| BUFFER_OFFSET(indexAccessor.byteOffset)); |
| CheckErrors("draw elements"); |
| |
| { |
| std::map<std::string, int>::const_iterator it( |
| primitive.attributes.begin()); |
| std::map<std::string, int>::const_iterator itEnd( |
| primitive.attributes.end()); |
| |
| for (; it != itEnd; it++) { |
| if ((it->first.compare("POSITION") == 0) || |
| (it->first.compare("NORMAL") == 0) || |
| (it->first.compare("TEXCOORD_0") == 0)) { |
| if (gGLProgramState.attribs[it->first] >= 0) { |
| glDisableVertexAttribArray(gGLProgramState.attribs[it->first]); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| #if 0 // TODO(syoyo): Implement |
| static void DrawCurves(tinygltf::Scene &scene, const tinygltf::Mesh &mesh) { |
| (void)scene; |
| |
| if (gCurvesMesh.find(mesh.name) == gCurvesMesh.end()) { |
| return; |
| } |
| |
| if (gGLProgramState.uniforms["isCurvesLoc"] >= 0) { |
| glUniform1i(gGLProgramState.uniforms["isCurvesLoc"], 1); |
| } |
| |
| GLCurvesState &state = gCurvesMesh[mesh.name]; |
| |
| if (gGLProgramState.attribs["POSITION"] >= 0) { |
| glBindBuffer(GL_ARRAY_BUFFER, state.vb); |
| glVertexAttribPointer(gGLProgramState.attribs["POSITION"], 3, GL_FLOAT, |
| GL_FALSE, /* stride */ 0, BUFFER_OFFSET(0)); |
| CheckErrors("curve: vertex attrib pointer"); |
| glEnableVertexAttribArray(gGLProgramState.attribs["POSITION"]); |
| CheckErrors("curve: enable vertex attrib array"); |
| } |
| |
| glDrawArrays(GL_LINES, 0, state.count); |
| |
| if (gGLProgramState.attribs["POSITION"] >= 0) { |
| glDisableVertexAttribArray(gGLProgramState.attribs["POSITION"]); |
| } |
| } |
| #endif |
| |
| // Hierarchically draw nodes |
| static void DrawNode(tinygltf::Model &model, const tinygltf::Node &node) { |
| // Apply xform |
| |
| glPushMatrix(); |
| if (node.matrix.size() == 16) { |
| // Use `matrix' attribute |
| glMultMatrixd(node.matrix.data()); |
| } else { |
| // Assume Trans x Rotate x Scale order |
| if (node.scale.size() == 3) { |
| glScaled(node.scale[0], node.scale[1], node.scale[2]); |
| } |
| |
| if (node.rotation.size() == 4) { |
| glRotated(node.rotation[0], node.rotation[1], node.rotation[2], |
| node.rotation[3]); |
| } |
| |
| if (node.translation.size() == 3) { |
| glTranslated(node.translation[0], node.translation[1], |
| node.translation[2]); |
| } |
| } |
| |
| // std::cout << "node " << node.name << ", Meshes " << node.meshes.size() << |
| // std::endl; |
| |
| // std::cout << it->first << std::endl; |
| // FIXME(syoyo): Refactor. |
| // DrawCurves(scene, it->second); |
| DrawMesh(model, model.meshes[node.mesh]); |
| |
| // Draw child nodes. |
| for (size_t i = 0; i < node.children.size(); i++) { |
| DrawNode(model, model.nodes[node.children[i]]); |
| } |
| |
| glPopMatrix(); |
| } |
| |
| static void DrawModel(tinygltf::Model &model) { |
| #if 0 |
| std::map<std::string, tinygltf::Mesh>::const_iterator it(scene.meshes.begin()); |
| std::map<std::string, tinygltf::Mesh>::const_iterator itEnd(scene.meshes.end()); |
| |
| for (; it != itEnd; it++) { |
| DrawMesh(scene, it->second); |
| DrawCurves(scene, it->second); |
| } |
| #else |
| |
| // TODO(syoyo): Support non-default scenes. |
| assert(model.defaultScene >= 0); |
| const tinygltf::Scene &scene = model.scenes[model.defaultScene]; |
| for (size_t i = 0; i < scene.nodes.size(); i++) { |
| DrawNode(model, model.nodes[scene.nodes[i]]); |
| } |
| #endif |
| } |
| |
| static void Init() { |
| trackball(curr_quat, 0, 0, 0, 0); |
| |
| eye[0] = 0.0f; |
| eye[1] = 0.0f; |
| eye[2] = CAM_Z; |
| |
| lookat[0] = 0.0f; |
| lookat[1] = 0.0f; |
| lookat[2] = 0.0f; |
| |
| up[0] = 0.0f; |
| up[1] = 1.0f; |
| up[2] = 0.0f; |
| } |
| |
| static void PrintNodes(const tinygltf::Scene &scene) { |
| for (size_t i = 0; i < scene.nodes.size(); i++) { |
| std::cout << "node.name : " << scene.nodes[i] << std::endl; |
| } |
| } |
| |
| int main(int argc, char **argv) { |
| if (argc < 2) { |
| std::cout << "glview input.gltf <scale>\n" << std::endl; |
| return 0; |
| } |
| |
| float scale = 1.0f; |
| if (argc > 2) { |
| scale = atof(argv[2]); |
| } |
| |
| tinygltf::Model model; |
| tinygltf::TinyGLTF loader; |
| std::string err; |
| std::string input_filename(argv[1]); |
| std::string ext = GetFilePathExtension(input_filename); |
| |
| bool ret = false; |
| if (ext.compare("glb") == 0) { |
| // assume binary glTF. |
| ret = loader.LoadBinaryFromFile(&model, &err, input_filename.c_str()); |
| } else { |
| // assume ascii glTF. |
| ret = loader.LoadASCIIFromFile(&model, &err, input_filename.c_str()); |
| } |
| |
| if (!err.empty()) { |
| printf("ERR: %s\n", err.c_str()); |
| } |
| if (!ret) { |
| printf("Failed to load .glTF : %s\n", argv[1]); |
| exit(-1); |
| } |
| |
| Init(); |
| |
| // DBG |
| PrintNodes(model.scenes[model.defaultScene]); |
| |
| if (!glfwInit()) { |
| std::cerr << "Failed to initialize GLFW." << std::endl; |
| return -1; |
| } |
| |
| char title[1024]; |
| sprintf(title, "Simple glTF viewer: %s", input_filename.c_str()); |
| |
| window = glfwCreateWindow(width, height, title, NULL, NULL); |
| if (window == NULL) { |
| std::cerr << "Failed to open GLFW window. " << std::endl; |
| glfwTerminate(); |
| return 1; |
| } |
| |
| glfwGetWindowSize(window, &width, &height); |
| |
| glfwMakeContextCurrent(window); |
| |
| // Callback |
| glfwSetWindowSizeCallback(window, reshapeFunc); |
| glfwSetKeyCallback(window, keyboardFunc); |
| glfwSetMouseButtonCallback(window, clickFunc); |
| glfwSetCursorPosCallback(window, motionFunc); |
| |
| glewExperimental = true; // This may be only true for linux environment. |
| if (glewInit() != GLEW_OK) { |
| std::cerr << "Failed to initialize GLEW." << std::endl; |
| return -1; |
| } |
| |
| reshapeFunc(window, width, height); |
| |
| GLuint vertId = 0, fragId = 0, progId = 0; |
| if (false == LoadShader(GL_VERTEX_SHADER, vertId, "shader.vert")) { |
| return -1; |
| } |
| CheckErrors("load vert shader"); |
| |
| if (false == LoadShader(GL_FRAGMENT_SHADER, fragId, "shader.frag")) { |
| return -1; |
| } |
| CheckErrors("load frag shader"); |
| |
| if (false == LinkShader(progId, vertId, fragId)) { |
| return -1; |
| } |
| |
| CheckErrors("link"); |
| |
| { |
| // At least `in_vertex` should be used in the shader. |
| GLint vtxLoc = glGetAttribLocation(progId, "in_vertex"); |
| if (vtxLoc < 0) { |
| printf("vertex loc not found.\n"); |
| exit(-1); |
| } |
| } |
| |
| glUseProgram(progId); |
| CheckErrors("useProgram"); |
| |
| SetupMeshState(model, progId); |
| // SetupCurvesState(model, progId); |
| CheckErrors("SetupGLState"); |
| |
| std::cout << "# of meshes = " << model.meshes.size() << std::endl; |
| |
| while (glfwWindowShouldClose(window) == GL_FALSE) { |
| glfwPollEvents(); |
| glClearColor(0.1f, 0.2f, 0.3f, 1.0f); |
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| |
| glEnable(GL_DEPTH_TEST); |
| |
| GLfloat mat[4][4]; |
| build_rotmatrix(mat, curr_quat); |
| |
| // camera(define it in projection matrix) |
| glMatrixMode(GL_PROJECTION); |
| glPushMatrix(); |
| gluLookAt(eye[0], eye[1], eye[2], lookat[0], lookat[1], lookat[2], up[0], |
| up[1], up[2]); |
| |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| glMultMatrixf(&mat[0][0]); |
| |
| glScalef(scale, scale, scale); |
| |
| DrawModel(model); |
| |
| glMatrixMode(GL_PROJECTION); |
| glPopMatrix(); |
| |
| glFlush(); |
| |
| glfwSwapBuffers(window); |
| } |
| |
| glfwTerminate(); |
| } |
