Add multi monitor multiplayer

gameobject.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"github.com/veandco/go-sdl2/sdl"
+	"image/color"
+)
+
+type GameObject struct {
+	baseRect    sdl.Rect
+	borderRect  sdl.Rect
+	orientation uint8
+	visualRects [][]*ColoredRect
+	colors      []color.Color
+}
+
+type ColoredRect struct {
+	color color.Color
+	rect  *sdl.Rect
+}
+
+func adjustRectToCamera(object *sdl.Rect, camera *sdl.Rect) *sdl.Rect {
+	return &sdl.Rect{
+		X: object.X - camera.X,
+		Y: object.Y - camera.Y,
+		W: object.W,
+		H: object.H,
+	}
+}
+
+func (gameObject *GameObject) adjustRectToCamera(offset *sdl.Rect, camera *sdl.Rect) *sdl.Rect {
+	return &sdl.Rect{
+		X: gameObject.baseRect.X + offset.X - camera.X,
+		Y: gameObject.baseRect.Y + offset.Y - camera.Y,
+		W: offset.W,
+		H: offset.H,
+	}
+}
+
+func (gameObject *GameObject) render(camera *sdl.Rect, surface *sdl.Surface) {
+	if camera.HasIntersection(&gameObject.baseRect) {
+		if Debug {
+			gameObject.borderRect = sdl.Rect{
+				X: gameObject.baseRect.X - 1,
+				Y: gameObject.baseRect.Y - 1,
+				W: gameObject.baseRect.W + 2,
+				H: gameObject.baseRect.H + 2,
+			}
+			borderRectFinal := adjustRectToCamera(&gameObject.borderRect, camera)
+			baseRectFinal := adjustRectToCamera(&gameObject.baseRect, camera)
+			surface.FillRect(borderRectFinal, sdl.MapRGBA(surface.Format, 20, 192, 128, 64))
+			surface.FillRect(baseRectFinal, sdl.MapRGBA(surface.Format, 255, 20, 10, 64))
+		}
+		if RenderGameObjects {
+			for _, coloredRect := range gameObject.visualRects[gameObject.orientation] {
+				finalRect := gameObject.adjustRectToCamera(coloredRect.rect, camera)
+				r, g, b, a := coloredRect.color.RGBA()
+				surface.FillRect(finalRect, sdl.MapRGBA(surface.Format, uint8(r), uint8(g), uint8(b), uint8(a)))
+			}
+		}
+	}
+}
+
+func (gameObject *GameObject) addColoredRect(x, y, w, h int32, color uint8) {
+	if gameObject.visualRects == nil {
+		gameObject.visualRects = make([][]*ColoredRect, 0)
+	}
+	if uint8(len(gameObject.visualRects)) <= gameObject.orientation {
+		gameObject.visualRects = append(gameObject.visualRects, make([]*ColoredRect, 0))
+	}
+	if uint8(len(gameObject.colors)) > color {
+		gameObject.visualRects[gameObject.orientation] = append(gameObject.visualRects[gameObject.orientation],
+			&ColoredRect{
+				color: gameObject.colors[color],
+				rect: &sdl.Rect{
+					X: x, Y: y, W: w, H: h,
+				},
+			})
+	}
+}
+
+func (gameObject *GameObject) getCurrentRects() []*ColoredRect {
+	return gameObject.visualRects[gameObject.orientation]
+}
+
+func (gameObject *GameObject) addColor(color color.Color) {
+	gameObject.colors = append(gameObject.colors, color)
+}