bool Window::renderFrame()
{
// Update time
timeSinceLastFrame = glfwGetTime() - lastFrameTime;
lastFrameTime = glfwGetTime();
// Clear Screen
// TODO: Add clearing depth buffer when it is necessary
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Call assigned render function
renderFunction(timeSinceLastFrame);
// Poll inputs
glfwPollEvents();
// Update view matrix
Program::updateViewMatrix(Camera::getCurrentCamera()->getViewMatrix());
// Swap Buffers -- Always do this at the end of frame's render
glfwSwapBuffers(window);
// Determine if window should close
// TODO: Move key functionality to input callback
bool shouldClose = shouldClose || glfwWindowShouldClose(window);
return !shouldClose;
}
void DrawWaveform::
draw_glList( boost::shared_ptr<RenderData> chunk, void (*renderFunction)( boost::shared_ptr<RenderData> ), bool force_redraw )
{
#ifdef LEGACY_OPENGL
// do a cache lookup
std::map<void*, ListCounter>::iterator itr = _chunkGlList.find(chunk.get());
if (_chunkGlList.end() == itr && force_redraw) {
force_redraw = false;
}
// cache miss or force_redraw
if (_chunkGlList.end() == itr || force_redraw) {
ListCounter cnt;
if (force_redraw) {
cnt = itr->second;
cnt.age = ListCounter::Age_InUse;
} else {
cnt.age = ListCounter::Age_JustCreated;
cnt.displayList = glGenLists(1);
}
if (0 != cnt.displayList) {
glNewList(cnt.displayList, GL_COMPILE_AND_EXECUTE );
renderFunction( chunk );
glEndList();
_chunkGlList[chunk.get()] = cnt;
} else {
// render anyway, but not into display list and enqueue gc
_enqueueGcDisplayList = true;
renderFunction( chunk );
}
} else {
// render cache
itr->second.age = ListCounter::Age_InUse; // don't remove
glCallList( itr->second.displayList );
}
#else
EXCEPTION_ASSERTX(false, "requires LEGACY_OPENGL");
#endif
}
void GLCanvas::keyboard(unsigned char key, int x, int y) {
switch (key) {
case 'r': // 'R' = call the render routine
case 'R':
printf("Beginning scene render...\n");
if (renderFunction) renderFunction(scene);
printf(" ...done.\n");
break;
}
}
int main(int argc, char* argv[])
{
// sample command line:
// raytracer -input scene1_1.txt -size 200 200 -output output1_1.tga -depth 9 10 depth1_1.tga
for (int i = 1; i < argc; i++) {
if (!strcmp(argv[i], "-input")) {
i++; assert(i < argc);
input_file = argv[i];
}
else if (!strcmp(argv[i], "-size")) {
i++; assert(i < argc);
width = atoi(argv[i]);
i++; assert(i < argc);
height = atoi(argv[i]);
}
else if (!strcmp(argv[i], "-output")) {
i++; assert(i < argc);
output_file = argv[i];
}
else if (!strcmp(argv[i], "-depth")) {
i++; assert(i < argc);
depth_min = atof(argv[i]);
i++; assert(i < argc);
depth_max = atof(argv[i]);
i++; assert(i < argc);
depth_file = argv[i];
}
else if (!strcmp(argv[i], "-normals")){
i++; assert(i < argc);
normal_file = argv[i];
}
else if (!strcmp(argv[i], "-gui")){
gui = true;
}
else if (!strcmp(argv[i], "-tessellation")){
i++; assert(i < argc);
theta = atoi(argv[i]);
i++; assert(i < argc);
phi = atoi(argv[i]);
}
else if (!strcmp(argv[i], "-gouraud")){
gouraud_flag = true;
}
else if (!strcmp(argv[i], "-shadows")){
shadow = true;
}
else if (!strcmp(argv[i], "-bounces")){
i++; assert(i < argc);
max_bounces = atoi(argv[i]);
}
else if (!strcmp(argv[i], "-weight")){
i++; assert(i < argc);
weight = atof(argv[i]);
}
else if (!strcmp(argv[i], "-shade_back")){
}
else {
printf("whoops error with command line argument %d: '%s'\n", i, argv[i]);
assert(0);
}
}
//Use the input file parsing code provided to load the camera,
//background color and objects of the scene.
sceneParser = new SceneParser(input_file);
rayTracer = new RayTracer(sceneParser,max_bounces,weight,shadow);
RayTree *rayTree = new RayTree();
if (gui){
GLCanvas* glCanvas = new GLCanvas();
//renderFunction:渲染函数，直接绘制出图像
//traceRayRunction:光线跟踪函数，预览图中绘制光线路径
glCanvas->initialize(sceneParser, renderFunction, traceRayFunction);
}
else{
renderFunction();
}
return 0;
}
/* Will call render function and then glutPosRedisplay() */
static void
do_glut_display() {
if (renderFunction) renderFunction();
glutPostRedisplay();
}
