static void make_fb()
{
// tcol is a 2D RGB texsize x texsize texture
// RGB is a constant that represents 8-bit RGB texture
// See the definition of TexFormat enum in texture.h for other values allowed.
// Stencil may require new hardware/drivers to work properly.
tcol = new Texture(RGB,texsize,texsize);
// tdepth is a depth texture, i.e. it stores depth values as the values of texels.
tdepth = new Texture(Depth,texsize,texsize);
// allocate new Framebuffer
fb = new Framebuffer;
// attach color and depth textures to it; the tcol texture will play the role of color
// buffer and tdepth - of the depth buffer.
fb->attachColor(tcol);
fb->attachDepth(tdepth);
// Print out the status of the frame buffer. In particular, if the textures are of
// wrong type/format, the framebuffer will not be `complete', i.e. suitable for
// rendering into it. If this is the case, you should get a message complaining
// about it in the terminal. For example, it is wrong to use a color texture as
// the depth texture or the other way around. The restrictions are mostly common
// sense. See specification for more details.
fb->printLog();
}
void initializeGL()
{
vec2 qbuf[4];
qbuf[0] = vec2(-1,-1);
qbuf[1] = vec2(1,-1);
qbuf[2] = vec2(-1,1);
qbuf[3] = vec2(1,1);
Buffer *q = new Buffer(4,qbuf);
vaQuad = new VertexArray;
vaQuad->attachAttribute(0,q);
pgmPhong = Program::createProgram(ShaderFile(Vert,"dpeel-shaders/vtxPhong.glsl"),
ShaderFile(Frag,"dpeel-shaders/frgPhong.glsl"));
pgmQuad = Program::createProgram(ShaderFile(Vert,"dpeel-shaders/vtxQuad.glsl"),
ShaderFile(Frag,"dpeel-shaders/frgQuad.glsl"));
Mesh M(getArgv()[1]);
center = M.getCenter();
mx = M.getUpperCorner();
mn = M.getLowerCorner();
maxdim = M.getMaxDim();
ts = M.getTriangleCount();
vloc = new Buffer(M.getVertexCount(),M.getVertexTable());
vnormal = new Buffer(M.getVertexCount(),M.getVertexNormals());
ix = new IndexBuffer(M.getTriangleCount(),M.getTriangleTable());
vaGouraudPhong = new VertexArray();
vaGouraudPhong->attachAttribute(0,vloc);
vaGouraudPhong->attachAttribute(1,vnormal);
glDisable(GL_CULL_FACE);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClearDepth(0.0);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
texsize = 800;
fb = new Framebuffer;
tex_depth[0] = new Texture(Depth,texsize,texsize); // clear
tex_depth[1] = new Texture(Depth,texsize,texsize);
tex_color = new Texture(RGBA,texsize,texsize);
fb->attachDepth(tex_depth[0]);
glClearDepth(1.0);
fb->attachColor(tex_color);
tex_color->bind(1);
tex_depth[0]->nearest();
tex_depth[1]->nearest();
tex_color->nearest();
beginMenu();
addMenuEntry("Peeling",do_peel);
addMenuEntry("Naive",do_naive);
endMenu();
glutAttachMenu(GLUT_RIGHT_BUTTON);
glGenQueries(1,&query);
}