/* 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 #include #include 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 ); // 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); glRotatef(-30, 1, 1, 1); //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); 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // ignorable ones 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, 0, 0, 10, 0, 0, 0, 40, 0, 0, 0, 10, 68, 11, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 0 0, 0, 20, 68, 0, 0, 50, 0, 0, 0, 20, 68, 23, 20, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 128, // 1 0, 0, 30, 68, 0, 0, 60, 68, 0, 0, 30, 68, 35, 30, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 2 0, 0, 40, 0, 0, 0, 70, 68, 0, 0, 40, 68, 47, 40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 3 0, 0, 50, 68, 0, 0, 80, 0, 0, 0, 50, 68, 51, 50, 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, 90, 0, 0, 0, 60, 68, 64, 60, 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, 100, 68, 0, 0, 70, 68, 70, 70, 0, 0, 0, 0, 128, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 6 0, 0, 60, 68, 0, 0, 110, 68, 0, 0, 80, 68, 89, 80, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 7 0, 0, 70, 0, 0, 0, 10, 68, 0, 0, 90, 68, 94, 90, 0, 0, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 8 0, 0, 80, 68, 0, 0, 20, 68, 0, 0, 100, 68, 20, 10, 0, 0, 0, 0, 0, 67, 0, 0, 0, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 9 0, 0, 90, 68, 0, 0, 128, 68, 0, 0, 110, 68, 31, 20, 0, 0, 0, 0, 0, 67, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 10 0, 0, 100, 0, 0, 0, 128, 68, 0, 0, 120, 68, 42, 30, 0, 0, 0, 0, 0, 0, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 11 0, 0, 110, 68, 0, 0, 55, 68, 0, 0, 5, 68, 53, 40, 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, 75, 68, 0, 0, 15, 68, 64, 50, 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, 25, 68, 75, 60, 0, 0, 0, 0, 128, 67, 0, 0, 128, 67, 0, 0, 0, 0, 128, 128, 128, 128, // 14 0, 0, 55, 68, 0, 0, 128, 68, 0, 0, 55, 68, 86, 70, 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, }; // 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*)&arrayData[0]); glTexCoordPointer(2, GL_FLOAT, 32, (void*)&arrayData[16]); glClientActiveTexture(GL_TEXTURE1); // XXX seems to be ignored in native build glTexCoordPointer(2, GL_SHORT, 32, (void*)&arrayData[24]); glClientActiveTexture(GL_TEXTURE0); // likely not needed, it is a cleanup glNormalPointer(GL_BYTE, 32, (void*)&arrayData[12]); glColorPointer(4, GL_UNSIGNED_BYTE, 32, (void*)&arrayData[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 vec4 texgenscroll;\n" "void main(void)\n" "{\n" " gl_Position = ftransform();\n" " gl_TexCoord[0].xy = gl_MultiTexCoord0.xy/10000.0 + (0.001*texgenscroll.xy) + gl_Normal.xy;\n" // added /100 here " gl_TexCoord[1].xy = gl_MultiTexCoord1.xy/100.0 * 3.051851e-05;\n" "}\n"; const char *fragmentShader = "uniform vec4 colorparams;\n" "uniform sampler2D diffusemap, lightmap;\n" "void main(void)\n" "{\n" " vec4 diffuse = texture2D(diffusemap, gl_TexCoord[0].xy);\n" " vec4 lm = texture2D(lightmap, gl_TexCoord[1].xy);\n" " diffuse *= colorparams;\n" " gl_FragColor = diffuse * lm;\n" "}\n"; GLuint vs = glCreateShader(GL_VERTEX_SHADER); glShaderSource(vs, 1, &vertexShader, NULL); glCompileShader(vs); glGetShaderiv(vs, GL_COMPILE_STATUS, &ok); assert(ok); GLuint fs = glCreateShader(GL_FRAGMENT_SHADER); glShaderSource(fs, 1, &fragmentShader, NULL); glCompileShader(fs); glGetShaderiv(fs, GL_COMPILE_STATUS, &ok); assert(ok); 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); glDrawArrays(GL_TRIANGLES, 16, 16); // END SDL_GL_SwapBuffers(); #ifndef __EMSCRIPTEN__ SDL_Delay(1500); #endif SDL_Quit(); return 0; }