| /* |
| THIS WORK, INCLUDING THE SOURCE CODE, DOCUMENTATION |
| AND RELATED MEDIA AND DATA, IS PLACED INTO THE PUBLIC DOMAIN. |
| |
| THE ORIGINAL AUTHOR IS KYLE FOLEY. |
| |
| THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY |
| OF ANY KIND, NOT EVEN THE IMPLIED WARRANTY OF |
| MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, |
| ASSUMES _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE |
| RESULTING FROM THE USE, MODIFICATION, OR |
| REDISTRIBUTION OF THIS SOFTWARE. |
| */ |
| |
| #ifndef __EMSCRIPTEN__ |
| #define USE_GLEW 1 |
| #endif |
| |
| #if USE_GLEW |
| #include "GL/glew.h" |
| #endif |
| |
| #include "SDL/SDL.h" |
| #if !USE_GLEW |
| #include "SDL/SDL_opengl.h" |
| #endif |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| PFNGLGENVERTEXARRAYSPROC glGenVertexArrays_ = NULL; |
| PFNGLBINDVERTEXARRAYPROC glBindVertexArray_ = NULL; |
| PFNGLDELETEVERTEXARRAYSPROC glDeleteVertexArrays_ = NULL; |
| |
| int main(int argc, char *argv[]) |
| { |
| SDL_Surface *screen; |
| if ( SDL_Init(SDL_INIT_VIDEO) != 0 ) { |
| printf("Unable to initialize SDL: %s\n", SDL_GetError()); |
| return 1; |
| } |
| |
| SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); |
| screen = SDL_SetVideoMode( 640, 480, 24, SDL_OPENGL ); |
| if ( !screen ) { |
| printf("Unable to set video mode: %s\n", SDL_GetError()); |
| return 1; |
| } |
| |
| glClearColor( 0, 0, 0, 0 ); |
| glClear( GL_COLOR_BUFFER_BIT ); |
| |
| glGenVertexArrays_ = (PFNGLGENVERTEXARRAYSPROC) SDL_GL_GetProcAddress("glGenVertexArrays"); |
| assert(glGenVertexArrays_); |
| glBindVertexArray_ = (PFNGLBINDVERTEXARRAYPROC) SDL_GL_GetProcAddress("glBindVertexArray"); |
| assert(glBindVertexArray_); |
| glDeleteVertexArrays_ = (PFNGLDELETEVERTEXARRAYSPROC) SDL_GL_GetProcAddress("glDeleteVertexArrays"); |
| assert(glDeleteVertexArrays_); |
| |
| // Generate a VAO |
| GLuint vao; |
| glGenVertexArrays_(1, &vao); |
| glBindVertexArray_(vao); |
| |
| // Create a texture |
| |
| GLuint texture; |
| glGenTextures( 1, &texture ); |
| glBindTexture( GL_TEXTURE_2D, texture ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); |
| GLubyte textureData[16*16*4]; |
| for (int x = 0; x < 16; x++) { |
| for (int y = 0; y < 16; y++) { |
| *((int*)&textureData[(x*16 + y) * 4]) = x*16 + ((y*16) << 8); |
| } |
| } |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, textureData ); |
| |
| // Create a second texture |
| |
| GLuint texture2; |
| glGenTextures( 1, &texture2 ); |
| glBindTexture( GL_TEXTURE_2D, texture2 ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); |
| GLubyte texture2Data[] = { 0xff, 0, 0, 0xff, |
| 0, 0xff, 0, 0xaa, |
| 0, 0, 0xff, 0x55, |
| 0x80, 0x90, 0x70, 0 }; |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, texture2Data ); |
| |
| // BEGIN |
| |
| #if USE_GLEW |
| glewInit(); |
| #endif |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| // original: glFrustum(-0.6435469817188064, 0.6435469817188064 ,-0.48266022190470925, 0.48266022190470925 ,0.5400000214576721, 2048); |
| //glFrustum(-0.6435469817188064, 0.1435469817188064 ,-0.48266022190470925, 0.88266022190470925 ,0.5400000214576721, 2048); |
| GLfloat pm[] = { 1.372136116027832, 0, 0, 0, 0, 0.7910231351852417, 0, 0, -0.6352481842041016, 0.29297152161598206, -1.0005275011062622, -1, 0, 0, -1.080284833908081, 0 }; |
| glLoadMatrixf(pm); |
| |
| glMatrixMode(GL_MODELVIEW); |
| GLfloat matrixData[] = { -1, 0, 0, 0, |
| 0, 0,-1, 0, |
| 0, 1, 0, 0, |
| 0, 0, 0, 1 }; |
| glLoadMatrixf(matrixData); |
| //glTranslated(-512,-512,-527); // XXX this should be uncommented, but if it is then nothing is shown |
| |
| // glEnable(GL_CULL_FACE); |
| // glEnable(GL_DEPTH_TEST); |
| |
| //glClear(GL_DEPTH_BUFFER_BIT); |
| |
| // glEnableClientState(GL_NORMAL_ARRAY); |
| // glEnableClientState(GL_COLOR_ARRAY); |
| glEnableClientState(GL_TEXTURE_COORD_ARRAY); |
| |
| glActiveTexture(GL_TEXTURE0); |
| |
| glEnableClientState(GL_VERTEX_ARRAY); |
| |
| GLuint arrayBuffer, elementBuffer; |
| glGenBuffers(1, &arrayBuffer); |
| glGenBuffers(1, &elementBuffer); |
| |
| GLubyte arrayData[] = { |
| /* |
| [0, 0, 0, 67] ==> 128 float |
| [0, 0, 128, 67] ==> 256 float |
| [0, 0, 0, 68] ==> 512 float |
| [0, 0, 128, 68] ==> 1024 float |
| |
| [vertex x ] [vertex y ] [vertex z ] [nr] [texture u ] [texture v ] [lm u ] [lm v ] [color r,g,b,a ] */ |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 0 |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 1 |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 2 |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 3 |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 4 |
| 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 5 |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 6 |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 7 |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 8 |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 9 |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 10 |
| 0, 0, 0, 0, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 11 |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 12 |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 13 |
| 0, 0, 128, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 14 |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 15 |
| |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 0, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 128, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, |
| 0, 0, 128, 68, 0, 0, 128, 68, 0, 0, 0, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128 |
| }; |
| assert(sizeof(arrayData) == 1408); |
| glBindBuffer(GL_ARRAY_BUFFER, arrayBuffer); |
| glBufferData(GL_ARRAY_BUFFER, sizeof(arrayData), arrayData, GL_STATIC_DRAW); |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| |
| GLushort elementData[] = { 1, 2, 0, 2, 3, 0, 5, 6, 4, 6, 7, 4, 9, 10, 8, 10, 11, 8, 13, 14, 12, 14, 15, 12 }; |
| assert(sizeof(elementData) == 48); |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBuffer); |
| glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(elementData), elementData, GL_STATIC_DRAW); |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, arrayBuffer); |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBuffer); |
| |
| // sauer vertex data is apparently 0-12: V3F, 12: N1B, 16-24: T2F, 24-28: T2S, 28-32: C4B |
| glVertexPointer(3, GL_FLOAT, 32, (void*)0); // all these apply to the ARRAY_BUFFER that is bound |
| glTexCoordPointer(2, GL_FLOAT, 32, (void*)16); |
| // glClientActiveTexture(GL_TEXTURE1); // XXX seems to be ignored in native build |
| // glTexCoordPointer(2, GL_SHORT, 32, (void*)24); |
| // glClientActiveTexture(GL_TEXTURE0); // likely not needed, it is a cleanup |
| // glNormalPointer(GL_BYTE, 32, (void*)12); |
| // glColorPointer(4, GL_UNSIGNED_BYTE, 32, (void*)28); |
| |
| glBindTexture(GL_TEXTURE_2D, texture); // diffuse? |
| glActiveTexture(GL_TEXTURE0); |
| glActiveTexture(GL_TEXTURE1); |
| glBindTexture(GL_TEXTURE_2D, texture2); // lightmap? |
| glActiveTexture(GL_TEXTURE0); |
| |
| GLint ok; |
| |
| const char *vertexShader = "uniform mat4 u_modelView;\n" |
| "uniform mat4 u_projection;\n" |
| "varying vec4 v_texCoord0;\n" |
| "void main(void)\n" |
| "{\n" // (gl_ProjectionMatrix * gl_ModelViewMatrix * gl_Vertex) |
| // (u_projection * u_modelView * a_position) |
| " gl_Position = (u_projection * u_modelView * gl_Vertex) + vec4(200, 0, 0, 0);\n" |
| " v_texCoord0.xy = gl_MultiTexCoord0.xy/20.0;\n" // added /100 here |
| "}\n"; |
| const char *fragmentShader = "uniform sampler2D diffusemap;\n" |
| "varying vec4 v_texCoord0;\n" |
| "void main(void)\n" |
| "{\n" |
| " vec4 diffuse = texture2D(diffusemap, v_texCoord0.xy);\n" |
| " gl_FragColor = diffuse;\n" |
| "}\n"; |
| |
| GLuint vs = glCreateShader(GL_VERTEX_SHADER); |
| glShaderSource(vs, 1, &vertexShader, NULL); |
| glCompileShader(vs); |
| glGetShaderiv(vs, GL_COMPILE_STATUS, &ok); |
| if (!ok) { |
| printf("Shader compilation error with vertex\n"); |
| GLint infoLen = 0; |
| glGetShaderiv (vs, GL_INFO_LOG_LENGTH, &infoLen); |
| if (infoLen > 1) |
| { |
| char* infoLog = (char *)malloc(sizeof(char) * infoLen+1); |
| glGetShaderInfoLog(vs, infoLen, NULL, infoLog); |
| printf("Error compiling shader:\n%s\n", infoLog); |
| } |
| } |
| |
| GLuint fs = glCreateShader(GL_FRAGMENT_SHADER); |
| glShaderSource(fs, 1, &fragmentShader, NULL); |
| glCompileShader(fs); |
| glGetShaderiv(fs, GL_COMPILE_STATUS, &ok); |
| if (!ok) { |
| printf("Shader compilation error with fragment\n"); |
| GLint infoLen = 0; |
| glGetShaderiv (fs, GL_INFO_LOG_LENGTH, &infoLen); |
| if (infoLen > 1) |
| { |
| char* infoLog = (char *)malloc(sizeof(char) * infoLen+1); |
| glGetShaderInfoLog(fs, infoLen, NULL, infoLog); |
| printf("Error compiling shader:\n%s\n", infoLog); |
| } |
| } |
| |
| GLuint program = glCreateProgram(); |
| |
| glAttachShader(program, vs); |
| glAttachShader(program, fs); |
| glLinkProgram(program); |
| glGetProgramiv(program, GL_LINK_STATUS, &ok); |
| assert(ok); |
| |
| glUseProgram(program); |
| |
| //GLint lightmapLocation = glGetUniformLocation(program, "lightmap"); |
| //assert(lightmapLocation >= 0); |
| //glUniform1i(lightmapLocation, 1); // sampler2D? Is it the texture unit? |
| |
| GLint diffusemapLocation = glGetUniformLocation(program, "diffusemap"); |
| assert(diffusemapLocation >= 0); |
| glUniform1i(diffusemapLocation, 0); |
| |
| //GLint texgenscrollLocation = glGetUniformLocation(program, "texgenscroll"); |
| //assert(texgenscrollLocation >= 0); |
| |
| //GLint colorparamsLocation = glGetUniformLocation(program, "colorparams"); |
| //assert(colorparamsLocation >= 0); |
| |
| //GLfloat texgenscrollData[] = { 0, 0, 0, 0 }; |
| //glUniform4fv(texgenscrollLocation, 1, texgenscrollData); |
| |
| //GLfloat colorparamsData[] = { 2, 2, 2, 1 }; |
| //glUniform4fv(colorparamsLocation, 1, colorparamsData); |
| |
| { |
| GLfloat data[16]; |
| glGetFloatv(GL_MODELVIEW_MATRIX, data); |
| printf("Modelview: "); |
| for (int i = 0; i < 16; i++) printf("%.3f, ", data[i]); |
| printf("\n"); |
| //memset(data, 0, 16*4); |
| GLint modelViewLocation = glGetUniformLocation(program, "u_modelView"); |
| assert(modelViewLocation >= 0); |
| glUniformMatrix4fv(modelViewLocation, 1, GL_FALSE, data); |
| } |
| { |
| GLfloat data[16]; |
| glGetFloatv(GL_PROJECTION_MATRIX, data); |
| printf("Projection: "); |
| for (int i = 0; i < 16; i++) printf("%.3f, ", data[i]); |
| printf("\n"); |
| //memset(data, 0, 16*4); |
| GLint projectionLocation = glGetUniformLocation(program, "u_projection"); |
| assert(projectionLocation >= 0); |
| glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, data); |
| } |
| |
| /* |
| glBindAttribLocation(program, 0, "a_position"); |
| glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 32, (void*)0); |
| glEnableVertexAttribArray(0); |
| |
| glBindAttribLocation(program, 1, "v_texCoord0"); |
| glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 32, (void*)16); |
| glEnableVertexAttribArray(1); |
| */ |
| |
| // stop recording in the VAO |
| |
| glBindVertexArray_(0); |
| |
| // unbind all the stuff the VAO would save for us, so this is a valid test |
| |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); |
| |
| glDisableClientState(GL_TEXTURE_COORD_ARRAY); |
| glDisableClientState(GL_VERTEX_ARRAY); |
| |
| // draw with VAO |
| |
| glBindVertexArray_(vao); |
| |
| glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, (void*)12); |
| glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, (void*) 0); |
| glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, (void*)24); |
| glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, (void*)36); |
| |
| // END |
| |
| SDL_GL_SwapBuffers(); |
| |
| #ifndef __EMSCRIPTEN__ |
| SDL_Delay(1500); |
| #endif |
| |
| // SDL_Quit(); |
| |
| return 0; |
| } |
| |
