void handle_middle_drag(double x, double y)
{
static const float MAX_PHI = 89.0f*M_PI/180.0f;
cam_theta -= (x-mouse_x) / 1000.0f;
if(cam_theta > 2.0f*M_PI)
cam_theta = 2.0f*M_PI - cam_theta;
cam_phi -= (y-mouse_y)/1000.0f;
cam_phi = gnd::clamp(cam_phi, (float)M_PI/36.0f, MAX_PHI);
cam_pos = point_on_sphere(cam_radius, cam_theta, cam_phi);
glm::mat4 mview{glm::lookAt(cam_pos, glm::vec3{0,0,0}, glm::vec3{0,1,0})};
glUniformMatrix4fv(glGetUniformLocation(shader, "u_view"), 1, GL_FALSE, &mview[0][0]);
}
const Sphere Sphere::Transform(const Matrix44& transform_matrix) const
{
Sphere result;
Vector3 point_on_sphere(1.0f, 1.0f, 1.0f);
point_on_sphere.Normalise();
point_on_sphere *= radius_;
point_on_sphere = point_on_sphere.TransformNoTranslation(transform_matrix);
result.set_radius(point_on_sphere.Length());
result.set_position(position_.Transform(transform_matrix));
return result;
}
int main()
{
gnd::debug_allocator<gnd::stack_allocator> alloc{"def", 1024};
Foo * f1 = GND_NEW(Foo,alloc);
GND_DELETE(f1,alloc);
window.create(1280, 720, "Plant");
window.on_left_drag.connect([](double x, double y){
handle_middle_drag(x, y);
return false;
});
window.on_cursor_move.connect([](double x, double y){
mouse_x = x;
mouse_y = y;
return false;
});
glClearColor(0.82,0.86,0.91,1.0);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
VAO grid = make_grid(100);
shader = gnd::load_shader("../data/basic3d.vs", "../data/basic3d.fs");
glUseProgram(shader);
cam_pos = point_on_sphere(cam_radius, cam_theta, cam_phi);
glm::mat4 mmodel{1.0f};
glm::mat4 mview{glm::lookAt(cam_pos, glm::vec3{0,0,0}, glm::vec3{0,1,0})};
glm::mat4 mproj{glm::perspective(0.785398f, 1280.0f/720.0f, 0.1f, 100.0f)};
glUniformMatrix4fv(glGetUniformLocation(shader, "u_projection"), 1, GL_FALSE, &mproj[0][0]);
glUniformMatrix4fv(glGetUniformLocation(shader, "u_view"), 1, GL_FALSE, &mview[0][0]);
glUniformMatrix4fv(glGetUniformLocation(shader, "u_model"), 1, GL_FALSE, &mmodel[0][0]);
std::vector<IndexedVAO> model = load_model("../data/model.blend");
double last_measure = glfwGetTime();
double time_now = last_measure;
size_t frames_rendered = 0;
char title_buf[64];
glfwSwapInterval(0);
glProvokingVertex(GL_FIRST_VERTEX_CONVENTION);
glfwGetCursorPos(window.handle(), &mouse_x, &mouse_y);
while(!window.should_close())
{
time_now = glfwGetTime();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBindVertexArray(grid.handle);
glDrawArrays(grid.mode, 0, grid.count);
draw_indexed_vaos(&model.front(), &model.back()+1);
window.swap_buffers();
glfwPollEvents();
++frames_rendered;
if(time_now - last_measure >= 1.0)
{
snprintf(title_buf, 64, "%.2lf FPS", (double)frames_rendered/(time_now-last_measure));
window.set_title(title_buf);
last_measure = time_now;
frames_rendered = 0;
}
}
return 0;
}
