// main function
int main(int argc, char** argv) {
auto args = parse_cmdline(argc, argv,
{ "03_animate", "view scene",
{ {"resolution", "r", "image resolution", typeid(int), true, jsonvalue() } },
{ {"scene_filename", "", "scene filename", typeid(string), false, jsonvalue("scene.json")},
{"image_filename", "", "image filename", typeid(string), true, jsonvalue("")} }
});
// generate/load scene either by creating a test scene or loading from json file
scene_filename = args.object_element("scene_filename").as_string();
scene = nullptr;
if(scene_filename.length() > 9 and scene_filename.substr(0,9) == "testscene") {
int scene_type = atoi(scene_filename.substr(9).c_str());
scene = create_test_scene(scene_type);
scene_filename = scene_filename + ".json";
} else {
scene = load_json_scene(scene_filename);
}
error_if_not(scene, "scene is nullptr");
image_filename = (args.object_element("image_filename").as_string() != "") ?
args.object_element("image_filename").as_string() :
scene_filename.substr(0,scene_filename.size()-5)+".png";
if(not args.object_element("resolution").is_null()) {
scene->image_height = args.object_element("resolution").as_int();
scene->image_width = scene->camera->width * scene->image_height / scene->camera->height;
}
animate_reset(scene);
subdivide(scene);
uiloop();
}
// scene update
void animate_update(Scene* scene, bool skinning_gpu) {
scene->animation->time ++;
if(scene->animation->time >= scene->animation->length) animate_reset(scene);
animate_frame(scene);
if(not skinning_gpu) animate_skin(scene);
simulate(scene);
}
// main function
int main(int argc, char** argv) {
auto args = parse_cmdline(argc, argv,
{ "04_animate", "raytrace a scene",
{ {"resolution", "r", "image resolution", "int", true, jsonvalue() } },
{ {"scene_filename", "", "scene filename", "string", false, jsonvalue("scene.json")},
{"image_filename", "", "image filename", "string", true, jsonvalue("")} }
});
scene_filename = args.object_element("scene_filename").as_string();
image_filename = (args.object_element("image_filename").as_string() != "") ?
args.object_element("image_filename").as_string() :
scene_filename.substr(0,scene_filename.size()-5)+".png";
scene = load_json_scene(scene_filename);
if(not args.object_element("resolution").is_null()) {
scene->image_height = args.object_element("resolution").as_int();
scene->image_width = scene->camera->width * scene->image_height / scene->camera->height;
}
animate_reset(scene);
subdivide(scene);
uiloop();
}
// uiloop
void uiloop() {
auto ok = glfwInit();
error_if_not(ok, "glfw init error");
// setting an error callback
glfwSetErrorCallback([](int ecode, const char* msg){ return error(msg); });
// glfwWindowHint(GLFW_SAMPLES, scene->image_samples*scene->image_samples);
auto window = glfwCreateWindow(scene->image_width, scene->image_height,
"graphics13 | animate", NULL, NULL);
error_if_not(window, "glfw window error");
glfwMakeContextCurrent(window);
glfwSetCharCallback(window, [](GLFWwindow* window, unsigned int key) {
switch (key) {
case 's': scene->draw_captureimage = true; break;
case ' ': scene->draw_animated = not scene->draw_animated; break;
case '.': animate_update(scene); break;
case 'g': scene->animation->gpu_skinning = not scene->animation->gpu_skinning; animate_reset(scene); break;
case 'n': scene->draw_normals = not scene->draw_normals; break;
case 'w': scene->draw_wireframe = not scene->draw_wireframe; break;
}
});
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
#ifdef _WIN32
auto ok1 = glewInit();
error_if_not(GLEW_OK == ok1, "glew init error");
#endif
auto state = new ShadeState();
init_shaders(state);
init_textures(scene,state);
animate_reset(scene);
auto mouse_last_x = -1.0;
auto mouse_last_y = -1.0;
auto last_update_time = glfwGetTime();
while(not glfwWindowShouldClose(window)) {
auto title = tostring("graphics14 | animate | %03d", scene->animation->time);
glfwSetWindowTitle(window, title.c_str());
if(scene->draw_animated) {
if(glfwGetTime() - last_update_time > scene->animation->dt) {
last_update_time = glfwGetTime();
animate_update(scene);
}
}
glfwGetFramebufferSize(window, &scene->image_width, &scene->image_height);
scene->camera->width = (scene->camera->height * scene->image_width) / scene->image_height;
shade(scene,state);
if(glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT)) {
double x, y;
glfwGetCursorPos(window, &x, &y);
if (mouse_last_x < 0 or mouse_last_y < 0) { mouse_last_x = x; mouse_last_y = y; }
auto delta_x = x - mouse_last_x, delta_y = y - mouse_last_y;
set_view_turntable(scene->camera, delta_x*0.01, -delta_y*0.01, 0, 0, 0);
mouse_last_x = x;
mouse_last_y = y;
} else { mouse_last_x = -1; mouse_last_y = -1; }
if(scene->draw_captureimage) {
auto image = image3f(scene->image_width,scene->image_height);
glReadPixels(0, 0, scene->image_width, scene->image_height, GL_RGB, GL_FLOAT, &image.at(0,0));
write_png(image_filename, image, true);
scene->draw_captureimage = false;
}
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
delete state;
}
