image3f read_pnm(const string& filename, bool flipY) {
int width, height, nc; float scale; unsigned char* buffer; char type;
_read_pnm(filename, type, width, height, nc, scale, buffer);
if (not buffer) {
error_if_not(false, "failed to load image file %s", filename.c_str());
return image3f();
}
error_if_not(nc == 3 && (type == 'f' || type == 'B'), "unsupported image format in file %s", filename.c_str());
image3f img(width,height);
if(type == 'f') {
float* buf = (float*)buffer;
for(int i = 0; i < img.width()*img.height(); i ++) {
img.data()[i] = vec3f(buf[i*3+0],buf[i*3+1],buf[i*3+2]) * scale;
}
} else if(type == 'B') {
unsigned char* buf = (unsigned char*)buffer;
for(int i = 0; i < img.width()*img.height(); i ++) {
img.data()[i] = vec3f((float)buf[i*3+0],(float)buf[i*3+1],(float)buf[i*3+2]) * scale;
}
}
if (buffer) delete [] buffer;
if(flipY) img = img.flipy();
return img;
}
// 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,
"graphics14 | model", 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 'w':
scene->draw_wireframe = ! 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);
auto mouse_last_x = -1.0;
auto mouse_last_y = -1.0;
while(! glfwWindowShouldClose(window)) {
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 || 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;
}
// uiloop
void uiloop() {
auto ok_glfw = glfwInit();
error_if_not(ok_glfw, "glfw init error");
// setting an error callback
glfwSetErrorCallback([](int ecode, const char* msg){ return error(msg); });
glfwWindowHint(GLFW_SAMPLES, scene->image_samples);
auto window = glfwCreateWindow(scene->image_width, scene->image_height,
"graphics | animate", NULL, NULL);
error_if_not(window, "glfw window error");
glfwMakeContextCurrent(window);
glfwSetCharCallback(window, [](GLFWwindow* window, unsigned int key) {
switch (key) {
case 's': { save = true; } break;
case ' ': { animate = not animate; } break;
case '.': { animate_update(scene, skinning_gpu); } break;
case 'g': { skinning_gpu = not skinning_gpu; animate_reset(scene); } break;
case 'n': { draw_normals = not draw_normals; } break;
case 'e': { draw_edges = not draw_edges; } break;
case 'p': { draw_points = not draw_points; } break;
case 'f': { draw_faces = not draw_faces; } break;
}
});
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
auto ok_glew = glewInit();
error_if_not(GLEW_OK == ok_glew, "glew init error");
init_shaders();
init_textures(scene);
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("graphics | animate | %03d", scene->animation->time);
glfwSetWindowTitle(window, title.c_str());
if(animate) {
if(glfwGetTime() - last_update_time > scene->animation->dt) {
last_update_time = glfwGetTime();
animate_update(scene, skinning_gpu);
}
}
if(save) {
animate_reset(scene);
for(auto i : range(scene->animation->length/3)) animate_update(scene, skinning_gpu);
}
glfwGetFramebufferSize(window, &scene->image_width, &scene->image_height);
scene->camera->width = (scene->camera->height * scene->image_width) / scene->image_height;
shade(scene);
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(save) {
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);
save = false;
}
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
}