//Set up openGL
bool GLInit()
{
//set viewport
int height;
if (window.height==0)
height=1;
else
height=window.height;
glViewport(0, 0, window.width, height); //reset viewport
//set up projection matrix
glMatrixMode(GL_PROJECTION); //select projection matrix
glLoadIdentity(); //reset
gluPerspective(45.0f, (GLfloat)window.width/(GLfloat)height, 1.0f, 100.0f);
//load identity modelview
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//other states
//shading
glShadeModel(GL_SMOOTH);
glClearColor( backgroundColor.r,
backgroundColor.g,
backgroundColor.b,
backgroundColor.a);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
//depth
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
//hints
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable(GL_CULL_FACE);
//set up sphere
sphere=gluNewQuadric();
//Set up vertex arrays for quad
glVertexPointer(3, GL_FLOAT, 0, vertexPositions);
glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
glEnable(GL_VERTEX_ARRAY);
glEnable(GL_TEXTURE_COORD_ARRAY);
//load vertex program
glGenProgramsNV(1, &vertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, vertexProgram);
LoadNV_vertex_program("vertex program.txt", vertexProgram);
//Set track matrices
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV);
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 4, GL_TEXTURE0_ARB, GL_IDENTITY_NV);
//Set texture atten states
SetTextureAttenStates();
return true;
}
//Set up openGL
bool GLInit()
{
//set viewport
int height;
if (window.height==0)
height=1;
else
height=window.height;
glViewport(0, 0, window.width, height); //reset viewport
//set up projection matrix
glMatrixMode(GL_PROJECTION); //select projection matrix
glLoadIdentity(); //reset
gluPerspective(45.0f, (GLfloat)window.width/(GLfloat)height, 0.1f, 100.0f);
//load identity modelview
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//other states
//shading
glShadeModel(GL_SMOOTH);
glClearColor( backgroundColor.r,
backgroundColor.g,
backgroundColor.b,
backgroundColor.a);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
//depth
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
//hints
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
//load vertex programs
glGenProgramsNV(1, &chromaticSingleVP);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, chromaticSingleVP);
LoadNV_vertex_program("chromatic single vp.txt", chromaticSingleVP);
glGenProgramsNV(1, &simpleSingleVP);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, simpleSingleVP);
LoadNV_vertex_program("simple single vp.txt", simpleSingleVP);
glGenProgramsNV(1, &chromaticTwin1VP);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, chromaticTwin1VP);
LoadNV_vertex_program("chromatic twin 1 vp.txt", chromaticTwin1VP);
glGenProgramsNV(1, &chromaticTwin2VP);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, chromaticTwin2VP);
LoadNV_vertex_program("chromatic twin 2 vp.txt", chromaticTwin2VP);
//Set track matrices
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV);
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 4, GL_MODELVIEW, GL_IDENTITY_NV);
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 8, GL_MODELVIEW, GL_INVERSE_TRANSPOSE_NV);
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 12, GL_TEXTURE, GL_IDENTITY_NV);
//Send fresnel multipication factor to c[28]
glProgramParameter4fNV( GL_VERTEX_PROGRAM_NV, 28, fresnel, fresnel, fresnel, 1.0f);
//Send refractive indices to c[32], c[33], c[34]
glProgramParameter4fNV( GL_VERTEX_PROGRAM_NV, 32, index, index*index, 0.0f, 1.0f);
glProgramParameter4fNV( GL_VERTEX_PROGRAM_NV, 33, index+indexDelta,
(index+indexDelta)*(index+indexDelta), 0.0f, 1.0f);
glProgramParameter4fNV( GL_VERTEX_PROGRAM_NV, 34, index+2*indexDelta,
(index+2*indexDelta)*(index+2*indexDelta), 0.0f, 1.0f);
//Send useful constants to c[64]
glProgramParameter4fNV( GL_VERTEX_PROGRAM_NV, 64, 0.0f, 1.0f, 2.0f, 0.5f);
//Init states to begin
if(renderPath==CHROMATIC_SINGLE)
InitChromaticSingleStates();
if(renderPath==SIMPLE_SINGLE)
InitSimpleSingleStates();
return true;
}
//Set up openGL
bool GLInit()
{
//set viewport
int height = 480;
int width = 640;
glViewport(0, 0, width, height); //reset viewport
//set up projection matrix
glMatrixMode(GL_PROJECTION); //select projection matrix
glLoadIdentity(); //reset
gluPerspective(45.0f, (GLfloat)width/(GLfloat)height, 1.0f, 100.0f);
//load identity modelview
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//other states
//shading
glShadeModel(GL_SMOOTH);
glClearColor( backgroundColor.r,
backgroundColor.g,
backgroundColor.b,
backgroundColor.a);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
//depth
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
//hints
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
//Set up vertex arrays for torus
//Fixed 17th November 2002
//Instead of passing tangents as texture coords 1 and 2, use aliased attributes 9 and 10.
//This way, these texture coordinates will reach the vertex program on a geforce 2
//which only has 2 texture units.
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(TORUS_VERTEX), &torus.vertices[0].position);
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, sizeof(TORUS_VERTEX), &torus.vertices[0].normal);
//Pass texture coords to unit 0
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, sizeof(TORUS_VERTEX), &torus.vertices[0].s);
//Pass tangent,binormal to attributes 9, 10
glEnableClientState(GL_VERTEX_ATTRIB_ARRAY9_NV);
glVertexAttribPointerNV(9, 3, GL_FLOAT, sizeof(TORUS_VERTEX), &torus.vertices[0].sTangent);
glEnableClientState(GL_VERTEX_ATTRIB_ARRAY10_NV);
glVertexAttribPointerNV(10, 3, GL_FLOAT, sizeof(TORUS_VERTEX), &torus.vertices[0].tTangent);
//Use compiled vertex arrays
glLockArraysEXT(0, torus.numVertices);
//Load vertex programs
glGenProgramsNV(1, &singlePassVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, singlePassVertexProgram);
LoadNV_vertex_program("single pass vertex program.txt", singlePassVertexProgram);
glGenProgramsNV(1, &diffuseDecalVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, diffuseDecalVertexProgram);
LoadNV_vertex_program("diffuse decal vertex program.txt", diffuseDecalVertexProgram);
glGenProgramsNV(1, &lookUpSpecularVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, lookUpSpecularVertexProgram);
LoadNV_vertex_program("look up specular vertex program.txt", lookUpSpecularVertexProgram);
glGenProgramsNV(1, &diffuseVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, diffuseVertexProgram);
LoadNV_vertex_program("diffuse vertex program.txt", diffuseVertexProgram);
glGenProgramsNV(1, &decalVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, decalVertexProgram);
LoadNV_vertex_program("decal vertex program.txt", decalVertexProgram);
glGenProgramsNV(1, &simpleSpecularVertexProgram);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, simpleSpecularVertexProgram);
LoadNV_vertex_program("simple specular vertex program.txt", simpleSpecularVertexProgram);
//Set Tracking Matrix
//Modelview Projection in registers c[0]-c[3]
glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV);
return true;
}
