func MainLoop(gs *gamestate.GameState, renderer *rendering.WorldRenderer) {
var frames int
time := float32(sdl.GetTicks()) / 1000
window := gs.Window
running := true
for running {
currentTime := float32(sdl.GetTicks()) / 1000
if currentTime > time+1 {
gs.Fps = float32(frames)
frames = 0
time = currentTime
}
frames += 1
running = Input(gs, renderer)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.Disable(gl.BLEND)
simulation.Simulate(gs, renderer.ParticleSystem)
renderer.View = gs.Camera.View()
renderer.Render(gs.World, &gs.Options, window)
tw.Draw()
sdl.GL_SwapWindow(window)
helpers.UpdateManagers()
}
}
// returns false if the player wants to quit
func Input(gs *gamestate.GameState, worldRenderer *rendering.WorldRenderer) bool {
running := true
window := gs.Window
inp := gamestate.PlayerInput{}
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
consumeEvent := true
if !sdl.GetRelativeMouseMode() {
consumeEvent = tw.EventSDL(event, 2, 0)
}
if consumeEvent {
switch e := event.(type) {
case *sdl.WindowEvent:
switch e.Event {
case sdl.WINDOWEVENT_CLOSE:
running = false
case sdl.WINDOWEVENT_RESIZED:
width, height := int(e.Data1), int(e.Data2)
worldRenderer.Resize(width, height)
tw.WindowSize(width, height)
}
case *sdl.MouseButtonEvent:
button := e.Button
if e.State == sdl.PRESSED && drag == 255 {
drag = e.Button
}
if e.State == sdl.RELEASED && drag == button {
drag = 255
}
if e.State == sdl.PRESSED && button == sdl.BUTTON_RIGHT {
GrabCursor()
}
// ray cast testing
if e.State == sdl.PRESSED && button == sdl.BUTTON_LEFT {
dir_cs := GetMouseDirection(window, int(e.X), int(e.Y))
out, hit := RayCastInCameraSpace(gs, dir_cs)
if hit {
n := helpers.Vector(gs.World.HeightMap.Normal2f(out[0], out[1]))
debug.Color(mgl.Vec4{0, 1, 0, 1})
debug.Line(out, out.Add(n))
}
}
case *sdl.KeyDownEvent:
switch e.Keysym.Scancode {
case sdl.SCANCODE_RETURN:
GrabCursor()
case sdl.SCANCODE_SPACE:
case sdl.SCANCODE_ESCAPE:
running = false
}
case *sdl.KeyUpEvent:
}
}
}
if sdl.GetRelativeMouseMode() {
x, y, _ := sdl.GetRelativeMouseState()
inp.Rotate[0] = -float32(y) / 500
inp.Rotate[1] = -float32(x) / 500
}
keyState := sdl.GetKeyboardState()
if keyState[sdl.SCANCODE_E] == 1 {
inp.Move[2] -= 1
}
if keyState[sdl.SCANCODE_D] == 1 {
inp.Move[2] += 1
}
if keyState[sdl.SCANCODE_S] == 1 {
inp.Move[0] -= 1
}
if keyState[sdl.SCANCODE_F] == 1 {
inp.Move[0] += 1
}
if keyState[sdl.SCANCODE_R] == 1 {
inp.Rotate[2] -= 0.01
}
if keyState[sdl.SCANCODE_W] == 1 {
inp.Rotate[2] += 0.01
}
x, y, button_state := sdl.GetMouseState()
if button_state&sdl.BUTTON_LEFT != 0 {
dir_cs := GetMouseDirection(window, x, y)
out, hit := RayCastInCameraSpace(gs, dir_cs)
if hit {
heightMap := gs.World.HeightMap
heightMap.Bump(mgl.Vec2{out[0], out[1]}, 3)
}
}
gs.World.Player.Input = inp
return running
}