\u0412\u044b\u0437\u043e\u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0433\u0440\u0443\u043f\u043f\u044b \u0448\u0435\u0439\u0434\u0435\u0440\u043e\u0432 \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0433\u043b\u044f\u0434\u0435\u0442\u044c \u0442\u0430\u043a:<\/p>\n\n\n
\nloadShadersGroup("phong", "PHONG; COLOR | TEXTURE; NONE | OVERMASK", pFLvertex->pData, pFLfragment->pData);\n<\/pre><\/div>\n\n\n<\/p>\n\n\n\n
\u042d\u0442\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0431\u0443\u0434\u0435\u0442 \u0434\u043e\u043b\u0436\u043d\u0430 \u043f\u043e\u0441\u0442\u0440\u043e\u0438\u0442\u044c 4 \u0448\u0435\u0439\u0434\u0435\u0440-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b \u0441\u043e \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c\u0438 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044f\u043c\u0438 defines:<\/p>\n\n\n\n
- PHONG + COLOR<\/li>
- PHONG + COLOR + OVERMASK<\/li>
- PHONG + TEXTURE<\/li>
- PHONG + TEXTURE + OVERMASK<\/li><\/ul>\n\n\n\n
\u0418\u043c\u043f\u043b\u0435\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044f<\/strong>:<\/p>\n\n\n\n
1. \u0417\u0430\u043f\u0443\u0441\u0442\u0438\u043c VS, \u043e\u0442\u043a\u0440\u043e\u0435\u043c C:\\CPP\\a997modeler<\/em>\\p_windows\\p_windows.sln<\/em>.<\/p>\n\n\n\n
\n\n\n\n\u041f\u043e\u043d\u0430\u0434\u043e\u0431\u044f\u0442\u0441\u044f \u043d\u043e\u0432\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0438 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435 \u0432 \u043a\u043b\u0430\u0441\u0441\u0435 Shader<\/strong>.<\/p>\n\n\n\n
2. \u0417\u0430\u043c\u0435\u043d\u0438\u043c Shader.h<\/em> \u043a\u043e\u0434 \u043d\u0430<\/p>\n\n\n
\n#pragma once\n#include "platform.h"\n#include <string>\n#include <vector>\n\nclass Shader\n{\npublic:\n \/\/Shader program's individual descriptor:\n unsigned int GLid = -1; \/\/ GL shader id\n char shaderType[20] = "";\n \/\/common variables, "l_" for "location"\n \/\/attributes\n int l_aPos; \/\/attribute position (3D coordinates)\n int l_aTuv; \/\/attribute TUV (texture coordinates)\n int l_aTuv2; \/\/attribute TUV (texture coordinates for normal map)\n int l_aNormal; \/\/attribute normal (3D vector)\n int l_aTangent; \/\/for normal map\n int l_aBinormal; \/\/for normal map\n \/\/uniforms\n int l_uMVP; \/\/ transform matrix (Model-View-Projection)\n int l_uMV3x3; \/\/ Model-View matrix for normals\n int l_uVectorToLight; \/\/required for light\n int l_uHalfVector; \/\/required for specular light\n \/\/material's properties\n int l_uColor;\n int l_uTex0; \/\/texture id\n int l_uTex1mask; \/\/transparency map\n int l_uTex2nm; \/\/normal map\n int l_uTex3; \/\/texture id\n int l_uTex1alphaChannelN; \/\/alpha channel for mask\n int l_uTex1alphaNegative; \/\/alpha channel negative\n int l_uTex0translateChannelN; \/\/translate tex0 to tex3 by channelN.\n int l_uAlphaFactor; \/\/for semi-transparency\n int l_uAlphaBlending; \/\/for semi-transparency\n \/\/light:\n int l_uAmbient; \/\/ambient light\n \/\/specular light parameters\n int l_uSpecularIntencity;\n int l_uSpecularMinDot;\n int l_uSpecularPowerOf;\n \/\/end of descriptor\n\n \/\/static array (vector) of all loaded shaders\n static std::vector<Shader*> shaders;\n\npublic:\n static int loadShaders();\n static int cleanUp();\n static unsigned int getGLid(int shN) { return shaders.at(shN)->GLid; };\n static int shaderErrorCheck(int shaderId, std::string ref);\n static int programErrorCheck(int programId, std::string ref);\n static int fillLocations(Shader* pSh);\n\n static int buildShaderObjectFromFiles(std::string filePathVertexS, std::string filePathFragmentS);\n static int linkShaderProgramFromFiles(const char* filePathVertexS, const char* filePathFragmentS);\n\tstatic int compileShaderFromFile(const char* filePath, GLenum shaderType);\n\n static int buildShaderObjectWithDefines(std::string shaderType, std::string definesString, char* sourceVertex, char* sourceFragment);\n static int linkShaderProgramWithDefines(std::string definesString, char* sourceVertex, char* sourceFragment);\n static int compileShaderWithDefines(std::string definesString, char* shaderSource, GLenum shaderType);\n\n static int loadShadersGroup(std::string shaderType, std::string optionsString, char* sourceVertex, char* sourceFragment);\n};\n\n<\/pre><\/div>\n\n\n<\/p>\n\n\n\n
\n\n\n\n3. \u0417\u0430\u043c\u0435\u043d\u0438\u043c Shader.cpp<\/em> \u043a\u043e\u0434 \u043d\u0430<\/p>\n\n\n
\n#include "Shader.h"\n#include "platform.h"\n#include "utils.h"\n#include "FileLoader.h"\n\nextern std::string filesRoot;\n\n\/\/static array (vector) of all loaded shaders\nstd::vector<Shader*> Shader::shaders;\n\nint Shader::loadShaders() {\n FileLoader* pFLvertex = new FileLoader("\/dt\/shaders\/phong_v.txt");\n FileLoader* pFLfragment = new FileLoader("\/dt\/shaders\/phong_f.txt");\n loadShadersGroup("flat", "FLAT; COLOR | TEXTURE; NONE | OVERMASK", pFLvertex->pData, pFLfragment->pData);\n loadShadersGroup("phong", "PHONG; COLOR | TEXTURE; NONE | OVERMASK", pFLvertex->pData, pFLfragment->pData);\n loadShadersGroup("mirror", "PHONG;MIRROR; NONE | OVERMASK", pFLvertex->pData, pFLfragment->pData);\n delete pFLvertex;\n delete pFLfragment;\n return 1;\n}\nint Shader::buildShaderObjectFromFiles(std::string filePathVertexS, std::string filePathFragmentS) {\n \/\/create shader object\n Shader* pSh = new Shader();\n shaders.push_back(pSh);\n pSh->GLid = linkShaderProgramFromFiles((filesRoot + filePathVertexS).c_str(), (filesRoot + filePathFragmentS).c_str());\n \/\/common variables. If not presented, = -1;\n fillLocations(pSh);\n\n return (shaders.size() - 1);\n}\nint Shader::fillLocations(Shader* pSh) {\n \/\/common variables. If not presented, = -1;\n \/\/attributes\n pSh->l_aPos = glGetAttribLocation(pSh->GLid, "aPos"); \/\/attribute position (3D coordinates)\n pSh->l_aNormal = glGetAttribLocation(pSh->GLid, "aNormal"); \/\/attribute normal (3D vector)\n pSh->l_aTangent = glGetAttribLocation(pSh->GLid, "aTangent"); \/\/for normal map\n pSh->l_aBinormal = glGetAttribLocation(pSh->GLid, "aBinormal"); \/\/for normal map\n pSh->l_aTuv = glGetAttribLocation(pSh->GLid, "aTuv"); \/\/attribute TUV (texture coordinates)\n pSh->l_aTuv2 = glGetAttribLocation(pSh->GLid, "aTuv2"); \/\/attribute TUV (texture coordinates)\n \/\/uniforms\n pSh->l_uMVP = glGetUniformLocation(pSh->GLid, "uMVP"); \/\/ transform matrix (Model-View-Projection)\n pSh->l_uMV3x3 = glGetUniformLocation(pSh->GLid, "uMV3x3"); \/\/ Model-View matrix for normals\n pSh->l_uVectorToLight = glGetUniformLocation(pSh->GLid, "uVectorToLight"); \/\/ \n pSh->l_uHalfVector = glGetUniformLocation(pSh->GLid, "uHalfVector"); \/\/ required for specular light\n \/\/material's properties\n pSh->l_uColor = glGetUniformLocation(pSh->GLid, "uColor");\n pSh->l_uTex0 = glGetUniformLocation(pSh->GLid, "uTex0"); \/\/texture id\n pSh->l_uTex1mask = glGetUniformLocation(pSh->GLid, "uTex1mask"); \/\/texture id\n pSh->l_uTex2nm = glGetUniformLocation(pSh->GLid, "uTex2nm"); \/\/texture id\n pSh->l_uTex3 = glGetUniformLocation(pSh->GLid, "uTex3"); \/\/texture id\n pSh->l_uTex1alphaChannelN = glGetUniformLocation(pSh->GLid, "uTex1alphaChannelN");\n pSh->l_uTex1alphaNegative = glGetUniformLocation(pSh->GLid, "uTex1alphaNegative");\n pSh->l_uTex0translateChannelN = glGetUniformLocation(pSh->GLid, "uTex0translateChannelN");\n pSh->l_uAlphaFactor = glGetUniformLocation(pSh->GLid, "uAlphaFactor"); \/\/ for semi-transparency\n pSh->l_uAlphaBlending = glGetUniformLocation(pSh->GLid, "uAlphaBlending"); \/\/ for semi-transparency\n pSh->l_uAmbient = glGetUniformLocation(pSh->GLid, "uAmbient"); \/\/ ambient light\n pSh->l_uSpecularIntencity = glGetUniformLocation(pSh->GLid, "uSpecularIntencity"); \/\/ \n pSh->l_uSpecularMinDot = glGetUniformLocation(pSh->GLid, "uSpecularMinDot"); \/\/ \n pSh->l_uSpecularPowerOf = glGetUniformLocation(pSh->GLid, "uSpecularPowerOf"); \/\/ \n return 1;\n}\nint Shader::cleanUp() {\n int shadersN = shaders.size();\n if (shadersN < 1)\n return -1;\n glUseProgram(0);\n for (int i = 0; i < shadersN; i++) {\n Shader* pSh = shaders.at(i);\n glDeleteProgram(pSh->GLid);\n delete pSh;\n }\n shaders.clear();\n return 1;\n}\n\nGLchar infoLog[1024];\nint logLength;\nint Shader::shaderErrorCheck(int shaderId, std::string ref) {\n \/\/use after glCompileShader()\n if (checkGLerrors(ref) > 0)\n return -1;\n glGetShaderInfoLog(shaderId, 1024, &logLength, infoLog);\n if (logLength == 0)\n return 0;\n mylog("%s shader infoLog:\\n%s\\n", ref.c_str(), infoLog);\n return -1;\n}\nint Shader::programErrorCheck(int programId, std::string ref) {\n \/\/use after glLinkProgram()\n if (checkGLerrors(ref) > 0)\n return -1;\n glGetProgramInfoLog(programId, 1024, &logLength, infoLog);\n if (logLength == 0)\n return 0;\n mylog("%s program infoLog:\\n%s\\n", ref.c_str(), infoLog);\n return -1;\n}\n\nint Shader::compileShaderFromFile(const char* filePath, GLenum shaderType) {\n int shaderId = glCreateShader(shaderType);\n FILE* pFile;\n myFopen_s(&pFile, filePath, "rt");\n if (pFile != NULL)\n {\n \/\/ obtain file size:\n fseek(pFile, 0, SEEK_END);\n int fSize = ftell(pFile);\n rewind(pFile);\n \/\/ size obtained, create buffer\n char* shaderSource = new char[fSize + 1];\n fSize = fread(shaderSource, 1, fSize, pFile);\n shaderSource[fSize] = 0;\n fclose(pFile);\n \/\/ source code loaded, compile\n glShaderSource(shaderId, 1, (const GLchar**)&shaderSource, NULL);\n \/\/myglErrorCheck("glShaderSource");\n glCompileShader(shaderId);\n if (shaderErrorCheck(shaderId, "glCompileShader") < 0)\n return -1;\n delete[] shaderSource;\n }\n else {\n mylog("ERROR loading %s\\n", filePath);\n return -1;\n }\n return shaderId;\n}\nint Shader::linkShaderProgramFromFiles(const char* filePathVertexS, const char* filePathFragmentS) {\n int vertexShaderId = compileShaderFromFile(filePathVertexS, GL_VERTEX_SHADER);\n int fragmentShaderId = compileShaderFromFile(filePathFragmentS, GL_FRAGMENT_SHADER);\n int programId = glCreateProgram();\n glAttachShader(programId, vertexShaderId);\n glAttachShader(programId, fragmentShaderId);\n glLinkProgram(programId);\n if (programErrorCheck(programId, "glLinkProgram") < 0)\n return -1;\n \/\/don't need shaders any longer - detach and delete them\n glDetachShader(programId, vertexShaderId);\n glDetachShader(programId, fragmentShaderId);\n glDeleteShader(vertexShaderId);\n glDeleteShader(fragmentShaderId);\n return programId;\n}\n\nint Shader::buildShaderObjectWithDefines(std::string shaderType, std::string definesString, char* sourceVertex, char* sourceFragment) {\n \/\/create shader object\n Shader* pSh = new Shader();\n shaders.push_back(pSh);\n myStrcpy_s(pSh->shaderType, 20, shaderType.c_str());\n\n pSh->GLid = linkShaderProgramWithDefines(definesString, sourceVertex, sourceFragment);\n \/\/common variables. If not presented, = -1;\n fillLocations(pSh);\n\n return (shaders.size() - 1);\n}\nint Shader::linkShaderProgramWithDefines(std::string definesString00, char* sourceVertex, char* sourceFragment) {\n \/\/build extended definesString\n bool bUSE_NORMALS = false;\n bool bUSE_TEX0 = false;\n bool bUSE_TUV0 = false;\n if (definesString00.find(" PHONG\\n") != std::string::npos)\n bUSE_NORMALS = true;\n if (definesString00.find(" TEXTURE\\n") != std::string::npos) {\n bUSE_TEX0 = true;\n bUSE_TUV0 = true;\n }\n if (definesString00.find(" MIRROR\\n") != std::string::npos) {\n bUSE_NORMALS = true;\n bUSE_TEX0 = true;\n }\n if (definesString00.find(" OVERMASK\\n") != std::string::npos) {\n bUSE_TUV0 = true;\n }\n std::string definesString;\n definesString.assign("#version 320 es\\n");\n definesString.append(definesString00);\n if (bUSE_NORMALS)\n definesString.append("#define USE_NORMALS\\n");\n if (bUSE_TEX0)\n definesString.append("#define USE_TEX0\\n");\n if (bUSE_TUV0)\n definesString.append("#define USE_TUV0\\n");\n\n int vertexShaderId = compileShaderWithDefines(definesString, sourceVertex, GL_VERTEX_SHADER);\n int fragmentShaderId = compileShaderWithDefines(definesString, sourceFragment, GL_FRAGMENT_SHADER);\n\n int programId = glCreateProgram();\n glAttachShader(programId, vertexShaderId);\n glAttachShader(programId, fragmentShaderId);\n glLinkProgram(programId);\n if (programErrorCheck(programId, "glLinkProgram") < 0)\n return -1;\n \/\/don't need shaders any longer - detach and delete them\n glDetachShader(programId, vertexShaderId);\n glDetachShader(programId, fragmentShaderId);\n glDeleteShader(vertexShaderId);\n glDeleteShader(fragmentShaderId);\n \/\/mylog("linking program\\n%s\\n", definesString.c_str());\n return programId;\n}\nint Shader::compileShaderWithDefines(std::string definesString, char* shaderSource, GLenum shaderType) {\n int shaderId = glCreateShader(shaderType);\n if (definesString.empty())\n glShaderSource(shaderId, 1, (const GLchar**)&shaderSource, NULL);\n else { \/\/2 strings\n const char* sourceStrings[2];\n sourceStrings[0] = definesString.c_str();\n sourceStrings[1] = shaderSource;\n \/\/ source code loaded, compile\n glShaderSource(shaderId, 2, (const GLchar**)sourceStrings, NULL);\n }\n \/\/myglErrorCheck("glShaderSource");\n glCompileShader(shaderId);\n if (shaderErrorCheck(shaderId, "glCompileShader") < 0) {\n mylog("ERROR in compileShader,\\n%s\\n%s\\n", definesString.c_str(), shaderSource);\n return -1;\n }\n return shaderId;\n}\n\nint Shader::loadShadersGroup(std::string shaderType, std::string optionsString, char* sourceVertex, char* sourceFragment) {\n struct Terms {\n std::vector<std::string> terms;\n int totalN = 0;\n int currentN = 0;\n };\n std::vector<Terms*> terms;\n std::vector<std::string> termGroups = splitString(optionsString, ";");\n int groupsN = termGroups.size();\n for (int groupN = 0; groupN < groupsN; groupN++) {\n Terms* pTerms = new Terms();\n terms.push_back(pTerms);\n pTerms->terms = splitString(termGroups.at(groupN), "|");\n pTerms->totalN = pTerms->terms.size();\n }\n while (1) {\n std::string definesString = "";\n for (int groupN = 0; groupN < groupsN; groupN++) {\n Terms* pTerms = terms.at(groupN);\n std::string term = pTerms->terms.at(pTerms->currentN);\n if (term.compare("NONE") != 0) {\n definesString.append("#define ");\n definesString.append(term);\n definesString.append("\\n");\n }\n }\n int shaderObjN = buildShaderObjectWithDefines(shaderType, definesString, sourceVertex, sourceFragment);\n \/\/go to next terms combo\n bool noMoreOptions = false;\n for (int groupN = groupsN - 1; groupN >= 0; groupN--) {\n Terms* pTerms = terms.at(groupN);\n if (pTerms->currentN < pTerms->totalN - 1) {\n pTerms->currentN++;\n break;\n }\n else { \/\/ the level exhausted\n pTerms->currentN = 0;\n \/\/proceed to upper level\n if (groupN == 0) {\n noMoreOptions = true;\n break;\n }\n }\n }\n if (noMoreOptions)\n break;\n }\n return 1;\n}\n\n<\/pre><\/div>\n\n\n<\/p>\n\n\n\n
- \u0417\u0430\u043c\u0435\u0442\u044c\u0442\u0435: \u0432\u0441\u0435\u0433\u043e 3 \u0432\u044b\u0437\u043e\u0432\u0430 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u044e\u0442 \u0414\u0415\u0421\u042f\u0422\u042c \u0448\u0435\u0439\u0434\u0435\u0440-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0438\u0437 \u0432\u0441\u0435\u0433\u043e \u041e\u0414\u041d\u041e\u0419 \u043f\u0430\u0440\u044b \u0448\u0435\u0439\u0434\u0435\u0440\u043e\u0432.<\/li><\/ul>\n\n\n\n
\n\n\n\n\u0422\u0435\u043f\u0435\u0440\u044c – \u0441\u0430\u043c\u0438 \u0448\u0435\u0439\u0434\u0435\u0440\u044b.<\/p>\n\n\n\n
4. Vertex shader<\/strong>:<\/p>\n\n\n
\n\/\/#version 320 es\nprecision lowp float;\nuniform mat4 uMVP; \/\/ transform matrix (Model-View-Projection)\nuniform mat3 uMV3x3; \/\/ Model-View matrix (for calculating normals into eye space)\n\nin vec3 aPos; \/\/ position attribute (x,y,z)\n#if defined(USE_NORMALS)\n\tin vec3 aNormal; \/\/ normal attribute (x,y,z)\n\tout vec3 vNormal; \/\/ varying normal (to pass to fragment shader)\n#endif\n#if defined(USE_TUV0)\n\tin vec2 aTuv; \/\/attribute TUV (texture coordinates)\n\tout vec2 vTuv; \/\/varying TUV (pass to fragment shader)\n#endif\n#if defined(MIRROR)\n\tout vec2 vTuvMirror; \/\/varying TUV (pass to fragment shader)\n#endif\n\nvoid main(void) { \n\tgl_Position = uMVP * vec4(aPos, 1.0);\n#if defined(USE_NORMALS)\t\n\t\/\/ Transform the normal's orientation into eye space. \n\tvNormal = uMV3x3 * aNormal;\t\n#endif\n#if defined(USE_TUV0)\n\tvTuv = aTuv;\n#endif\n#if defined(MIRROR)\n\tvTuvMirror[0] = (gl_Position[0]\/gl_Position[3]*0.1+vNormal[0]*0.4)+0.5;\n\tvTuvMirror[1] = -(gl_Position[1]\/gl_Position[3]*0.1+vNormal[1]*0.4)+0.5;\n#endif\n}\n\n<\/pre><\/div>\n\n\n<\/p>\n\n\n\n
\u041a\u043e\u043f\u0438\u0440\u0443\u0435\u043c \u044d\u0442\u043e\u0442 \u043a\u043e\u0434 \u0432 \u0422\u0435\u043a\u0441\u0442\u043e\u0432\u044b\u0439 \u0440\u0435\u0434\u0430\u043a\u0442\u043e\u0440 <\/strong>\u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u043c \u043a\u0430\u043a (overwrite)<\/p>\n\n\n\n
C:\\CPP\\engine\\dt\\shaders\\phong_v<\/strong>.txt <\/em><\/p>\n\n\n\n
- \u041d\u0430 \u0432\u0441\u044f\u043a\u0438\u0439 \u0441\u043b\u0443\u0447\u0430\u0439: reflection (\u043e\u0442\u0440\u0430\u0436\u0435\u043d\u0438\u0435, \u0441\u0442\u0440\u043e\u043a\u0438 \u0441 28 \u043f\u043e 31): \u043c\u044b \u0431\u0435\u0440\u0435\u043c \u043a\u0430\u0440\u0442\u0438\u043d\u043a\u0443 \u0431\u0435\u043b\u043e\u0433\u043e \u0448\u0443\u043c\u0430 (\u0438\u0437 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0433\u043b\u0430\u0432\u044b) \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u044b, \u043f\u043e\u0442\u043e\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u043c \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u043d\u044b\u0435 tUV \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b \u0438\u0437 \u044d\u043a\u0440\u0430\u043d\u043d\u043e\u0439 \u043f\u043e\u0437\u0438\u0446\u0438\u0438 \u0432\u0435\u0440\u0442\u0435\u043a\u0441\u0430 \u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u043e\u0440\u043c\u0430\u043b\u0438. \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f “gl_Position[0]\/gl_Position[3]” \u0434\u0430\u0435\u0442 \u043d\u0430\u043c \u043a\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b \u0432 GL\u0444\u043e\u0440\u043c\u0430\u0442\u0435 (\u043e\u0442 -1 \u0434\u043e 1) . \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f \u0432 \u0441\u043a\u043e\u0431\u043a\u0430\u0445 \u0434\u0430\u0435\u0442 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044e \u043f\u043e\u0437\u0438\u0446\u0438\u0438 + \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0435 \u043e\u0442 -0.5 \u0434\u043e 0.5. \u0422\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, vTuvMirror <\/em>– \u044d\u0442\u043e \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0437\u0438\u0446\u0438\u0438\/\u043e\u0440\u0438\u0435\u043d\u0442\u0430\u0446\u0438\u0438 \u0432 \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u043d\u044b\u0435 tUV \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b.<\/li><\/ul>\n\n\n\n
![](\"https:\/\/writingagame.com\/img\/b01\/c27\/02.jpg\")
<\/p>\n\n\n\n<\/p>\n\n\n\n
\n\n\n\n5. Fragment shader<\/strong>:<\/p>\n\n\n
\n\/\/#version 320 es\nprecision lowp float;\nout vec4 FragColor; \/\/output pixel color\nuniform float uAlphaFactor; \/\/for semi-transparency\nuniform int uAlphaBlending; \/\/for semi-transparency\n\n#if defined(USE_NORMALS)\n\tin vec3 vNormal; \/\/normal passed from rasterizer\n#endif\n#if defined(USE_TEX0)\n\tuniform sampler2D uTex0; \/\/texture id\n\tuniform sampler2D uTex3; \/\/translate texture id\n\tuniform int uTex0translateChannelN;\n#else\n\tuniform vec4 uColor;\n#endif\n#if defined(USE_TUV0)\n\tin vec2 vTuv; \/\/varying TUV (passed from vertex shader)\n#endif\n#if defined(MIRROR)\n\tin vec2 vTuvMirror; \/\/varying TUV (passed from vertex shader)\n#endif\n#if defined(OVERMASK)\n\tuniform sampler2D uTex1mask; \/\/texture id\n\tuniform int uTex1alphaChannelN;\n\tuniform int uTex1alphaNegative;\n#endif\n\n#if defined(PHONG)\n\tuniform float uAmbient;\n\tuniform float uSpecularIntencity;\n\tuniform float uSpecularMinDot;\n\tuniform float uSpecularPowerOf;\n\n\tuniform vec3 uVectorToLight;\n\tuniform vec3 uHalfVector;\n#endif\n\nvoid main(void) {\n\n\tvec4 outColor;\n\tfloat alpha = 1.0;\n#if defined(OVERMASK)\n\toutColor = texture(uTex1mask, vTuv);\n\talpha = outColor[uTex1alphaChannelN];\n\tif(uTex1alphaNegative > 0)\n\t\talpha = 1.0 - alpha;\n\tif(alpha < 0.5){\n\t\tif(uAlphaBlending > 0){\n\t\t\tif(alpha == 0.0){\n\t\t\t\tdiscard;\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\t\telse{ \/\/no AlphaBlending\n\t\t\tdiscard;\n\t\t\treturn;\n\t\t}\n\t}\n#endif\n#if defined(USE_TEX0)\n\t#if defined(MIRROR)\n\t\toutColor = texture(uTex0, vTuvMirror);\n\t#else\n\t\toutColor = texture(uTex0, vTuv);\n\t#endif\n\tif(uTex0translateChannelN >= 0){ \/\/translate channel\n\t\tvec2 tuv3;\n\t\ttuv3[0] = outColor[uTex0translateChannelN];\n\t\ttuv3[1] = 0.0;\n\t\toutColor = texture(uTex3, tuv3);\n\t}\n\tFragColor = outColor;\n#else\n\tFragColor = uColor;\n#endif\n\tif(FragColor.a != 1.0){\n\t\talpha *= FragColor.a;\n\t\tif(alpha < 0.5){\n\t\t\tif(uAlphaBlending > 0){\n\t\t\t\tif(alpha == 0.0){\n\t\t\t\t\tdiscard;\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\t\t\telse{ \/\/no AlphaBlending\n\t\t\t\tdiscard;\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\t}\n\n#if defined(USE_NORMALS)\n\tvec3 vNormalNormal = normalize(vNormal);\n#endif\n\n#if defined(PHONG)\n\tif(uAmbient<1.0){\n\t\t \/\/ Calculate the dot product of the light vector and vertex normal. If the normal and light vector are\n\t\t \/\/ pointing in the same direction then it will get max illumination.\n\t\t float directionalLightIntencity = dot(vNormalNormal, uVectorToLight);\n\t\t\n\t\t \/\/ count ambient component\n\t\t directionalLightIntencity += uAmbient;\n\t\t if(directionalLightIntencity < uAmbient)\n\t\t\tdirectionalLightIntencity = uAmbient;\n\n\t\t \/\/ Multiply the color by the lightIntencity illumination level to get final output color.\n\t\t FragColor *= directionalLightIntencity;\n\t}\n\tif(uSpecularIntencity>0.0){\n\t\t\/\/specular light\n\t\t\/\/ INTENSITY OF THE SPECULAR LIGHT\n\t\t\/\/ DOT PRODUCT OF NORMAL VECTOR AND THE HALF VECTOR TO THE POWER OF THE SPECULAR HARDNESS\n\t\tfloat dotProduct = dot(vNormalNormal, uHalfVector);\n\n\t\tif(dotProduct>uSpecularMinDot){\n\t\t\tfloat specularIntencity = pow(dotProduct, uSpecularPowerOf) * uSpecularIntencity;\t\t\n\t\t\tif(specularIntencity > uSpecularIntencity)\n\t\t\t\tspecularIntencity = uSpecularIntencity;\n\t\t\tFragColor += specularIntencity;\n\t\t}\n\t}\n#endif\n\tif(uAlphaFactor != 1.0)\n\t\talpha *= uAlphaFactor;\t\n\tFragColor.a = alpha;\n}\n\n<\/pre><\/div>\n\n\n<\/p>\n\n\n\n
\u041a\u043e\u043f\u0438\u0440\u0443\u0435\u043c \u044d\u0442\u043e\u0442 \u043a\u043e\u0434 \u0432 \u0422\u0435\u043a\u0441\u0442\u043e\u0432\u044b\u0439 \u0440\u0435\u0434\u0430\u043a\u0442\u043e\u0440 <\/strong>\u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u043c \u043a\u0430\u043a (overwrite)<\/p>\n\n\n\n
C:\\CPP\\engine\\dt\\shaders\\phong_f<\/strong>.txt <\/em><\/p>\n\n\n\n
\u041f\u043e\u044f\u0441\u043d\u0435\u043d\u0438\u044f<\/strong>:<\/p>\n\n\n\n
- \u041d\u0430 \u0432\u0441\u044f\u043a\u0438\u0439 \u0441\u043b\u0443\u0447\u0430\u0439: reflection (\u043e\u0442\u0440\u0430\u0436\u0435\u043d\u0438\u0435, \u0441\u0442\u0440\u043e\u043a\u0438 \u0441 28 \u043f\u043e 31): \u043c\u044b \u0431\u0435\u0440\u0435\u043c \u043a\u0430\u0440\u0442\u0438\u043d\u043a\u0443 \u0431\u0435\u043b\u043e\u0433\u043e \u0448\u0443\u043c\u0430 (\u0438\u0437 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0433\u043b\u0430\u0432\u044b) \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u044b, \u043f\u043e\u0442\u043e\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u043c \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u043d\u044b\u0435 tUV \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b \u0438\u0437 \u044d\u043a\u0440\u0430\u043d\u043d\u043e\u0439 \u043f\u043e\u0437\u0438\u0446\u0438\u0438 \u0432\u0435\u0440\u0442\u0435\u043a\u0441\u0430 \u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u043e\u0440\u043c\u0430\u043b\u0438. \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f “gl_Position[0]\/gl_Position[3]” \u0434\u0430\u0435\u0442 \u043d\u0430\u043c \u043a\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b \u0432 GL\u0444\u043e\u0440\u043c\u0430\u0442\u0435 (\u043e\u0442 -1 \u0434\u043e 1) . \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f \u0432 \u0441\u043a\u043e\u0431\u043a\u0430\u0445 \u0434\u0430\u0435\u0442 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044e \u043f\u043e\u0437\u0438\u0446\u0438\u0438 + \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0435 \u043e\u0442 -0.5 \u0434\u043e 0.5. \u0422\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, vTuvMirror <\/em>– \u044d\u0442\u043e \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0437\u0438\u0446\u0438\u0438\/\u043e\u0440\u0438\u0435\u043d\u0442\u0430\u0446\u0438\u0438 \u0432 \u0442\u0435\u043a\u0441\u0442\u0443\u0440\u043d\u044b\u0435 tUV \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u044b.<\/li><\/ul>\n\n\n\n
- \u0417\u0430\u043c\u0435\u0442\u044c\u0442\u0435: \u0432\u0441\u0435\u0433\u043e 3 \u0432\u044b\u0437\u043e\u0432\u0430 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u044e\u0442 \u0414\u0415\u0421\u042f\u0422\u042c \u0448\u0435\u0439\u0434\u0435\u0440-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0438\u0437 \u0432\u0441\u0435\u0433\u043e \u041e\u0414\u041d\u041e\u0419 \u043f\u0430\u0440\u044b \u0448\u0435\u0439\u0434\u0435\u0440\u043e\u0432.<\/li><\/ul>\n\n\n\n
![](\"https:\/\/writingagame.com\/img\/b01\/c27\/01.jpg\")
<\/p>\n\n\n\n![](\"https:\/\/writingagame.ru\/wp-content\/uploads\/2022\/02\/gold01.bmp\")
<\/p>\n\n\n\n