int main(void)
{
GLFWwindow window;
int width, height;
if (!glfwInit())
{
fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
window = glfwCreateWindow(window_width, window_height, GLFW_WINDOWED, "", NULL);
if (!window)
{
glfwTerminate();
fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
glfwSetCursorPosCallback(window, cursor_position_callback);
glfwSetWindowSizeCallback(window, window_size_callback);
glfwSetKeyCallback(window, key_callback);
glfwMakeContextCurrent(window);
glfwGetWindowSize(window, &width, &height);
window_size_callback(window, width, height);
set_swap_interval(window, swap_interval);
while (!glfwGetWindowParam(window, GLFW_CLOSE_REQUESTED))
{
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_LINES);
glVertex2f(0.f, (GLfloat) window_height - cursor_y);
glVertex2f((GLfloat) window_width, (GLfloat) window_height - cursor_y);
glVertex2f((GLfloat) cursor_x, 0.f);
glVertex2f((GLfloat) cursor_x, (GLfloat) window_height);
glEnd();
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
int main(int argc, char* argv[])
{
GLFWwindow* window;
double t, dt_total, t_old;
int width, height;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
window = glfwCreateWindow(640, 480, "Wave Simulation", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetKeyCallback(window, key_callback);
glfwSetWindowSizeCallback(window, window_size_callback);
glfwSetMouseButtonCallback(window, mouse_button_callback);
glfwSetCursorPosCallback(window, cursor_position_callback);
glfwSetScrollCallback(window, scroll_callback);
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
glfwGetWindowSize(window, &width, &height);
window_size_callback(window, width, height);
// Initialize OpenGL
init_opengl();
// Initialize simulation
init_vertices();
init_grid();
adjust_grid();
// Initialize timer
t_old = glfwGetTime() - 0.01;
while (!glfwWindowShouldClose(window))
{
t = glfwGetTime();
dt_total = t - t_old;
t_old = t;
// Safety - iterate if dt_total is too large
while (dt_total > 0.f)
{
// Select iteration time step
dt = dt_total > MAX_DELTA_T ? MAX_DELTA_T : dt_total;
dt_total -= dt;
// Calculate wave propagation
calc_grid();
}
// Compute height of each vertex
adjust_grid();
// Draw wave grid to OpenGL display
draw_scene(window);
glfwPollEvents();
}
exit(EXIT_SUCCESS);
}