\u0412 \u043d\u0430\u0448\u0438\u0445 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0445 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u0445 \u043c\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432 GL_TRIANGLE_STRIP \u0434\u043b\u044f \u0440\u0438\u0441\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0440\u044f\u043c\u043e\u0443\u0433\u043e\u043b\u044c\u043d\u0438\u043a\u0430 \u043a\u0430\u043a \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043c\u0430\u0441\u0441\u0438\u0432\u0430 \u0432\u0435\u0440\u0448\u0438\u043d. \u041d\u043e \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0439 \u0438 \u0447\u0430\u0441\u0442\u043e-\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0439 \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432 – \u044d\u0442\u043e \u0432\u0441\u0435-\u0436\u0435 GL_TRIANGLES<\/strong>. \u041c\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u0435\u0433\u043e \u0440\u0430\u043d\u044c\u0448\u0435 \u0434\u043b\u044f \u0440\u0438\u0441\u043e\u0432\u0430\u043d\u0438\u044f \u0442\u0440\u0435\u0443\u0433\u043e\u043b\u044c\u043d\u0438\u043a\u0430 \u043a\u0430\u043a \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432\u0435\u0440\u0448\u0438\u043d. \u0414\u043b\u044f \u0431\u043e\u043b\u0435\u0435 \u0441\u043b\u043e\u0436\u043d\u044b\u0445 \u0444\u043e\u0440\u043c \/ \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0435\u0439 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0439 \u043f\u043e\u0434\u0445\u043e\u0434 – \u044d\u0442\u043e \u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0432\u0435\u0440\u0442\u0435\u043a\u0441\u044b \u0432 VBO \u0431\u0435\u0437\u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0438\u0445 \u043f\u043e\u0440\u044f\u0434\u043a\u0430, \u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0440\u0438\u0441\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0435\u0440\u0436\u0430\u0442\u044c \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e \u043a\u0430\u043a \u043c\u0430\u0441\u0441\u0438\u0432 \u0438\u043d\u0434\u0435\u043a\u0441\u043e\u0432 (\u043d\u043e\u043c\u0435\u0440\u043e\u0432 \u0432\u0435\u0440\u0448\u0438\u043d) \u0432 \u0442\u0430\u043a \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u043c\u044b\u0445 EBO (Element Buffer Object) \u0438\u043b\u0438 IBO (index Buffer Object, \u0447\u0442\u043e \u0432\u043e\u0431\u0449\u0435\u043c-\u0442\u043e \u043e\u0434\u043d\u043e \u0438 \u0442\u043e \u0436\u0435).<\/p>\n\n\n\n

Windows<\/h2>\n\n\n\n

1. \u0417\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c VS, \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0435\u043c C:\\CPP\\a998engine\\p_windows\\p_windows.sln<\/em>.<\/p>\n\n\n\n

---

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\u041d\u0430\u0434\u043e \u0441\u043b\u0435\u0433\u043a\u0430 \u043f\u043e\u043c\u0435\u043d\u044f\u0442\u044c \u043a\u043b\u0430\u0441\u0441 DrawJob<\/em>.<\/p>\n\n\n\n

2. \u041e\u0442\u043a\u0440\u043e\u0435\u043c DrawJob.h<\/em> \u0438 \u0437\u0430\u043c\u0435\u043d\u0438\u043c \u043d\u0430:<\/p>\n\n\n

\n#pragma once\n#include "Material.h"\n#include <vector>\n\nstruct AttribRef \/\/attribute reference\/description\n{\n\tunsigned int glVBOid = 0; \/\/buffer object id\n\tint offset = 0; \/\/variable's offset inside of VBO's element\n\tint stride = 0; \/\/Buffer's element size in bytes\n};\n\nclass DrawJob\n{\npublic:\n\tMaterial mt;\n\tint pointsN = 0; \/\/N of points to draw\n\tunsigned int glVAOid = 0; \/\/will hold data stream attributes mapping\/positions\n\tunsigned int glEBOid = 0; \/\/Element Buffer Object (vertex indices)\n\n\t\/\/common attributes\n\tAttribRef aPos;\n\tAttribRef aTuv;\n\n\t\/\/static arrays (vectors) of all loaded DrawJobs, VBO ids\n\tstatic std::vector<DrawJob*> drawJobs;\n\tstatic std::vector<unsigned int> buffersIds;\npublic:\n\tDrawJob();\n\tvirtual ~DrawJob(); \/\/destructor\n\tstatic int cleanUp();\n\tstatic int newBufferId();\n\tint buildVAO() { return buildVAOforShader(this, mt.shaderN); };\n\tstatic int buildVAOforShader(DrawJob* pDJ, int shaderN);\n\tstatic int attachAttribute(int varLocationInShader, int attributeSizeInFloats, AttribRef* pAttribRef);\n\n\tint execute(float* uMVP, Material* pMt) { return executeDrawJob(this, uMVP, pMt); };\n\tstatic int executeDrawJob(DrawJob* pDJ, float* uMVP, Material* pMt);\n};\n\n<\/pre><\/div>\n\n\n
<\/p>\n\n\n\n
\u0422\u0435\u043f\u0435\u0440\u044c \u0443 \u043d\u0430\u0441 \u0442\u0430\u043c \u0435\u0441\u0442\u044c \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f glEBOid<\/em>.<\/p>\n\n\n\n
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\u0412 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 DrawJob::executeDrawJob()<\/em>, \u0435\u0441\u043b\u0438 EBO \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d, \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u043c\u0430\u043d\u0434\u0443 glDrawElements <\/em>\u0432\u043c\u0435\u0441\u0442\u043e glDrawArrays <\/em>\u043a\u0430\u043a \u0431\u044b\u043b\u043e \u0440\u0430\u043d\u044c\u0448\u0435. \u041c\u044b \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u043c \u0438\u0437\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c glDrawArrays <\/em>\u0434\u043b\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 (\u041d\u0415\u0438\u043d\u0434\u0435\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445) \u043c\u0430\u0441\u0441\u0438\u0432\u043e\u0432 \u0432\u0435\u0440\u0448\u0438\u043d (\u043a\u0430\u043a \u0434\u043b\u044f GL_TRIANGLE_STRIP \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440).<\/p>\n\n\n\n
\u0412 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 DrawJob::buildVAOforShader()<\/em>, \u0435\u0441\u043b\u0438 EBO \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d, \u0442\u043e \u043e\u043d \u0431\u0443\u0434\u0435\u0442 \u0432\u043a\u043b\u044e\u0447\u0435\u043d \u0432 VAO.<\/p>\n\n\n\n
3. \u041e\u0442\u043a\u0440\u043e\u0435\u043c DrawJob.cpp<\/em> \u0438 \u0437\u0430\u043c\u0435\u043d\u0438\u043c \u043a\u043e\u0434 \u043d\u0430:<\/p>\n\n\n
\n#include "DrawJob.h"\n#include "platform.h"\n#include "utils.h"\n#include "Shader.h"\n#include "Texture.h"\n\n\/\/static arrays (vectors) of all loaded DrawJobs, VBO ids\nstd::vector<DrawJob*> DrawJob::drawJobs;\nstd::vector<unsigned int> DrawJob::buffersIds;\n\nDrawJob::DrawJob() {\n\tdrawJobs.push_back(this);\n}\nDrawJob::~DrawJob() {\n\tglBindBuffer(GL_ARRAY_BUFFER, 0);\n\tglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);\n\tif (glVAOid > 0)\n\t\tglDeleteVertexArrays(1, &glVAOid);\n}\nint DrawJob::newBufferId() {\n\tunsigned int bufferId;\n\tglGenBuffers(1, &bufferId);\n\tbuffersIds.push_back(bufferId);\n\treturn (int)bufferId;\n}\nunsigned int activeVBOid;\nint DrawJob::buildVAOforShader(DrawJob* pDJ, int shaderN) {\n\t\/\/delete VAO if exists already\n\tif (pDJ->glVAOid > 0) {\n\t\tglBindBuffer(GL_ARRAY_BUFFER, 0);\n\t\tglDeleteVertexArrays(1, &(pDJ->glVAOid));\n\t}\n\tglGenVertexArrays(1, &pDJ->glVAOid);\n\tglBindVertexArray(pDJ->glVAOid);\n\n\t\/\/open shader descriptor to access variables locations\n\tShader* pShader = Shader::shaders.at(pDJ->mt.shaderN);\n\n\tactiveVBOid = 0;\n\tattachAttribute(pShader->l_aPos, 3, &pDJ->aPos);\n\tattachAttribute(pShader->l_aTuv, 2, &pDJ->aTuv);\n\n\tif (pDJ->glEBOid > 0)\n\t\tglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, pDJ->glEBOid);\n\n\tglBindVertexArray(0);\n\tglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);\n\tglBindBuffer(GL_ARRAY_BUFFER, 0);\n\treturn 1;\n}\n\nint DrawJob::attachAttribute(int varLocationInShader, int attributeSizeInFloats, AttribRef* pAR) {\n\tif (varLocationInShader < 0)\n\t\treturn 0; \/\/not used in this shader\n\tif (pAR->glVBOid == 0) {\n\t\tmylog("ERROR in DrawJob::attachAttribute, nk such attribute\/VBO\\n");\n\t\treturn -1;\n\t}\n\tglEnableVertexAttribArray(varLocationInShader);\n\tif (activeVBOid != pAR->glVBOid) {\n\t\tactiveVBOid = pAR->glVBOid;\n\t\t\/\/attach input stream data\n\t\tglBindBuffer(GL_ARRAY_BUFFER, activeVBOid);\n\t}\n\tglVertexAttribPointer(varLocationInShader, attributeSizeInFloats, GL_FLOAT, GL_FALSE, pAR->stride, (void*)(long)pAR->offset);\n\treturn 1;\n}\nint DrawJob::executeDrawJob(DrawJob* pDJ, float* uMVP, Material* pMt) {\n\tif (pMt == NULL)\n\t\tpMt = &(pDJ->mt);\n\tglBindVertexArray(pDJ->glVAOid);\n\tShader* pShader = Shader::shaders.at(pMt->shaderN);\n\tglUseProgram(pShader->GLid);\n\tglUniformMatrix4fv(pShader->l_uMVP, 1, GL_FALSE, (const GLfloat*)uMVP);\n\n\t\/\/attach textures\n\tif (pShader->l_uTex0 >= 0) {\n\t\tint textureId = Texture::getGLid(pMt->uTex0);\n\t\t\/\/pass textureId to shader program\n\t\tglActiveTexture(GL_TEXTURE0); \/\/ activate the texture unit first before binding texture\n\t\tglBindTexture(GL_TEXTURE_2D, textureId);\n\t\t\/\/ Tell the texture uniform sampler to use this texture in the shader by binding to texture unit 0.    \n\t\tglUniform1i(pShader->l_uTex0, 0);\n\t}\n\t\/\/other uniforms\n\tif (pShader->l_uColor >= 0) {\n\t\t\/\/float uColor[4] = { 1.f, 0.f, 1.f, 1.f }; \/\/R,G,B, alpha\n\t\tglUniform4fv(pShader->l_uColor, 1, pMt->uColor.forGL());\n\t}\n\tif (pDJ->glEBOid == 0) {\n\t\tglDrawArrays(pMt->primitiveType, 0, pDJ->pointsN);\n\t}\n\telse { \/\/use EBO\n\t\tglDrawElements(pMt->primitiveType, pDJ->pointsN, GL_UNSIGNED_SHORT, 0);\n\t}\n\tglBindVertexArray(0);\n\treturn 1;\n}\nint DrawJob::cleanUp() {\n\tint itemsN = drawJobs.size();\n\t\/\/delete all drawJobs\n\tfor (int i = 0; i < itemsN; i++) {\n\t\tDrawJob* pDJ = drawJobs.at(i);\n\t\tdelete pDJ;\n\t}\n\tdrawJobs.clear();\n\t\/\/delete Buffers\n\titemsN = buffersIds.size();\n\t\/\/delete all buffers\n\tfor (int i = 0; i < itemsN; i++) {\n\t\tunsigned int id = buffersIds.at(i);\n\t\tglDeleteBuffers(1, &id);\n\t}\n\tbuffersIds.clear();\n\n\treturn 1;\n}\n\n<\/pre><\/div>\n\n\n
<\/p>\n\n\n\n
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\u0412 TheGame.cpp<\/em> \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u043c\u0430\u0441\u0441\u0438\u0432 frontIndices<\/em>: 6 \u0438\u043d\u0434\u0435\u043a\u0441\u043e\u0432 \u0434\u043b\u044f 2-\u0445 \u0442\u0440\u0435\u0443\u0433\u043e\u043b\u044c\u043d\u0438\u043a\u043e\u0432: North-West->South-West->South-East and NW->SE->NE.<\/p>\n\n\n\n
\u0412 TheGame::getReady()<\/em>, \u043f\u0440\u0438 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0438 DrawJob <\/em>(\u0441 \u043a\u0430\u0440\u0442\u0438\u043d\u043a\u043e\u0439), \u043c\u044b \u0441\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c EBO \u0438 \u043f\u043e\u043c\u0435\u043d\u044f\u0435\u043c pDJ->mt.primitiveType<\/em> \u0441 GL_TRIANGLE_STRIP \u043d\u0430 GL_TRIANGLES.<\/p>\n\n\n\n
\u0422\u0430\u043a\u0436\u0435 \u043d\u0430\u0434\u043e \u043f\u043e\u043c\u0435\u043d\u044f\u0442\u044c pDJ->pointsN<\/em> \u0441 4 (4 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0432\u0435\u0440\u0448\u0438\u043d\u044b) \u043d\u0430 6<\/strong> (2 \u0438\u043d\u0434\u0435\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0442\u0440\u0435\u0443\u0433\u043e\u043b\u044c\u043d\u0438\u043a\u0430).<\/p>\n\n\n\n
4. \u041e\u0442\u043a\u0440\u043e\u0435\u043c TheGame.cpp<\/em> \u0438 \u0437\u0430\u043c\u0435\u043d\u0438\u043c \u043a\u043e\u0434 \u043d\u0430:<\/p>\n\n\n
\n#include "TheGame.h"\n#include "platform.h"\n#include "linmath.h"\n#include "Texture.h"\n#include "Shader.h"\n#include "DrawJob.h"\n\nextern std::string filesRoot;\n\n\/\/static array (vector) for loaded gameSubjs\nstd::vector<GameSubj*> TheGame::gameSubjs;\n\nstatic const struct\n{\n    float x, y, z, tu, tv;\n} frontVertices[4] =\n{\n    { -0.5f,  0.5f, 0.f, 0.f, 0.f }, \/\/top-left\n    { -0.5f, -0.5f, 0.f, 0.f, 1.f }, \/\/bottom-left\n    {  0.5f,  0.5f, 0.f, 1.f, 0.f }, \/\/top-right\n    {  0.5f, -0.5f, 0.f, 1.f, 1.f }  \/\/bottom-right\n};\nGLushort frontIndices[6] = { 0,1,3, 0,3,2 };\n\nint TheGame::getReady() {\n    bExitGame = false;\n    Shader::loadShaders();\n    glEnable(GL_CULL_FACE);\n\n    GameSubj* pGS = new GameSubj();\n    gameSubjs.push_back(pGS);\n    pGS->djStartN = DrawJob::drawJobs.size();\n\n    pGS->name.assign("img1");\n    \/\/pGS->ownCoords.setPosition(-50, 50, 0);\n    pGS->ownSpeed.setDegrees(1, 2, 3);\n    pGS->scale[0] = 400;\n    pGS->scale[1] = pGS->scale[0] \/ 2;\n\n    \/\/face DrawJob\n    \/\/build VBO\n    unsigned int VBOid = DrawJob::newBufferId();\n    glBindBuffer(GL_ARRAY_BUFFER, VBOid);\n    glBufferData(GL_ARRAY_BUFFER, sizeof(frontVertices), frontVertices, GL_STATIC_DRAW);\n    int stride = sizeof(float) * 5;\n    \/\/add DrawJob\n    DrawJob* pDJ = new DrawJob();\n    pDJ->pointsN = 6; \/\/number of points (vertices or indices in case of EBO)\n    \/\/define material\n    pDJ->mt.shaderN = Shader::spN_flat_tex;\n    pDJ->mt.primitiveType = GL_TRIANGLES; \/\/GL_TRIANGLE_STRIP;\n    pDJ->mt.uTex0 = Texture::loadTexture(filesRoot + "\/dt\/sample_img.png");\n    \/\/attributes references\n    AttribRef* pAR;\n    pAR = &pDJ->aPos; pAR->offset = 0;                 pAR->glVBOid = VBOid; pAR->stride = stride;\n    pAR = &pDJ->aTuv; pAR->offset = sizeof(float) * 3; pAR->glVBOid = VBOid; pAR->stride = stride;\n\n    \/\/build and attrach EBO\n    pDJ->glEBOid = DrawJob::newBufferId();\n    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, pDJ->glEBOid);\n    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(frontIndices), frontIndices, GL_STATIC_DRAW);\n\n    \/\/create and fill vertex attributes array (VAO)\n    pDJ->buildVAO();\n    pGS->djTotalN = DrawJob::drawJobs.size() - pGS->djStartN;\n\n    return 1;\n}\nint TheGame::drawFrame() {\n    myPollEvents();\n\n    \/\/glClearColor(0.0, 0.0, 0.5, 1.0);\n    glClear(GL_COLOR_BUFFER_BIT);\n    mat4x4 mProjection, mMVP;\n    mat4x4_ortho(mProjection, -(float)screenSize[0] \/ 2, (float)screenSize[0] \/ 2, -(float)screenSize[1] \/ 2, (float)screenSize[1] \/ 2, 200.f, -200.f);\n\n    \/\/scan subjects\n    int subjsN = gameSubjs.size();\n    for (int subjN = 0; subjN < subjsN; subjN++) {\n        GameSubj* pGS = gameSubjs.at(subjN);\n        \/\/behavior - apply rotation speed\n        pGS->moveSubj();\n        \/\/prepare subject for rendering\n        pGS->buildModelMatrix(pGS);\n        \/\/build MVP matrix for given subject\n        mat4x4_mul(mMVP, mProjection, pGS->ownModelMatrix);\n        \/\/render subject\n        for (int i = 0; i < pGS->djTotalN; i++) {\n            DrawJob* pDJ = DrawJob::drawJobs.at(pGS->djStartN + i);\n            pDJ->execute((float*)mMVP, NULL);\n        }\n    }\n    mySwapBuffers();\n    return 1;\n}\nint TheGame::cleanUp() {\n    Texture::cleanUp();\n    Shader::cleanUp();\n    DrawJob::cleanUp();\n    return 1;\n}\nint TheGame::onScreenResize(int width, int height) {\n    if (screenSize[0] == width && screenSize[1] == height)\n        return 0;\n    screenSize[0] = width;\n    screenSize[1] = height;\n    screenRatio = (float)width \/ (float)height;\n    glViewport(0, 0, width, height);\n    mylog(" screen size %d x %d\\n", width, height);\n    return 1;\n}\nint TheGame::run() {\n    getReady();\n    while (!bExitGame) {\n        drawFrame();\n    }\n    cleanUp();\n    return 1;\n}\n\n<\/pre><\/div>\n\n\n
<\/p>\n\n\n\n
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5. \u041a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044f \u0438 \u0437\u0430\u043f\u0443\u0441\u043a (\u0437\u0435\u043b\u0435\u043d\u0430\u044f \u0441\u0442\u0440\u0435\u043b\u043a\u0430), \u043a\u0430\u0440\u0442\u0438\u043d\u043a\u0430 \u0442\u0430 \u0436\u0435, \u0430 \u0437\u043d\u0430\u0447\u0438\u0442, \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u0441 \u043d\u0435<\/strong>-\u0438\u043d\u0434\u0435\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e GL_TRIANGLE_STRIP \u043d\u0430 \u0438\u043d\u0434\u0435\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 <\/strong>GL_TRIANGLES \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0441\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f.<\/p>\n\n\n\n
\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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