Initial commit.

colliders/baserectcollider.go

@@ -0,0 +1,50 @@
+package colliders
+
+import (
+	"fluids/gamedata"
+	"image"
+)
+
+type BaseRectCollider struct {
+	position    gamedata.Vector
+	dimensions  gamedata.Vector
+	iscontainer bool
+}
+
+func (b *BaseRectCollider) SetContainer(v bool) {
+	b.iscontainer = v
+}
+
+func (b *BaseRectCollider) SetPosition(p gamedata.Vector) {
+	b.position = p
+}
+
+func (b *BaseRectCollider) GetPosition() gamedata.Vector {
+	return b.position
+}
+
+func (b *BaseRectCollider) SetDimensions(d gamedata.Vector) {
+	b.dimensions = d
+}
+
+func (b *BaseRectCollider) GetDimensions() gamedata.Vector {
+	return b.dimensions
+}
+
+func (b *BaseRectCollider) GetBounds() image.Rectangle {
+	r := image.Rectangle{
+		Min: image.Point{
+			X: int(b.position.X - b.dimensions.X/2),
+			Y: int(b.position.Y - b.dimensions.Y/2),
+		},
+		Max: image.Point{
+			X: int(b.position.X + b.dimensions.X/2),
+			Y: int(b.position.Y + b.dimensions.Y/2),
+		},
+	}
+	return r
+}
+
+func (b *BaseRectCollider) IsContainer() bool {
+	return b.iscontainer
+}

colliders/collider.go

@@ -0,0 +1,15 @@
+package colliders
+
+import (
+	"fluids/gamedata"
+)
+
+type Collider interface {
+	GetPosition() gamedata.Vector
+	GetDimensions() gamedata.Vector
+	SetPosition(gamedata.Vector)
+	//GetBounds() image.Rectangle
+
+	//indicates whether this collider is inverted, i.e. 'contains' elements
+	//IsContainer() bool
+}