func (camera *cameraInfo) doArchitectFocusRegion(g *Game, sys system.System) {
if camera.limit.mid.X == 0 && camera.limit.mid.Y == 0 {
// On the very first frame the limit midpoint will be (0,0), which should
// never happen after the game begins. We use this as an opportunity to
// init the data now that we know the region we're working with.
rdx := float64(g.Levels[GidInvadersStart].Room.Dx)
rdy := float64(g.Levels[GidInvadersStart].Room.Dy)
if camera.regionDims.X/camera.regionDims.Y > rdx/rdy {
camera.limit.dims.Y = rdy
camera.limit.dims.X = rdy * camera.regionDims.X / camera.regionDims.Y
} else {
camera.limit.dims.X = rdx
camera.limit.dims.Y = rdx * camera.regionDims.Y / camera.regionDims.X
}
camera.limit.mid.X = rdx / 2
camera.limit.mid.Y = rdy / 2
camera.current = camera.limit
camera.zoom = 0
base.Log().Printf("Region Dims: %2.2v", camera.regionDims)
base.Log().Printf("Room Dims: %2.2v %2.2v", rdx, rdy)
base.Log().Printf("Limit Dims: %2.2v", camera.limit.dims)
}
wheel := gin.In().GetKeyFlat(gin.MouseWheelVertical, gin.DeviceTypeAny, gin.DeviceIndexAny)
camera.zoom += wheel.FramePressAmt() / 500
if camera.zoom < 0 {
camera.zoom = 0
}
if camera.zoom > 2 {
camera.zoom = 2
}
zoom := 1 / math.Exp(camera.zoom)
camera.current.dims = camera.limit.dims.Scale(zoom)
if gin.In().GetKey(gin.AnySpace).CurPressAmt() > 0 {
if !camera.cursorHidden {
sys.HideCursor(true)
camera.cursorHidden = true
}
x := gin.In().GetKey(gin.AnyMouseXAxis).FramePressAmt()
y := gin.In().GetKey(gin.AnyMouseYAxis).FramePressAmt()
camera.current.mid.X -= float64(x) * 2
camera.current.mid.Y -= float64(y) * 2
} else {
if camera.cursorHidden {
sys.HideCursor(false)
camera.cursorHidden = false
}
}
}
