worldgen water, fixes

internal/world/blocks/water.go

@@ -0,0 +1,37 @@
+package blocks
+
+import (
+	"edgaru089.ml/go/gl01/internal/util/itype"
+	"edgaru089.ml/go/gl01/internal/world"
+)
+
+type WaterBehaviour struct{}
+
+func (WaterBehaviour) Static() bool             { return false }
+func (WaterBehaviour) RequireDataset() bool     { return false }
+func (WaterBehaviour) RequireBlockUpdate() bool { return false }
+func (b WaterBehaviour) Appearance(position itype.Vec3i, aux int, data itype.Dataset, w *world.World) world.BlockAppearance {
+	return world.BlockAppearance{
+		Name:        "water",
+		Transparent: true,
+		NotSolid:    true,
+
+		RenderType: world.CustomRendering,
+		CustomRenderAppend: func(
+			position itype.Vec3i,
+			aux int,
+			data itype.Dataset,
+			w *world.World,
+			vertexArray []world.Vertex) []world.Vertex {
+
+			if block := w.Block(position.Addv(0, 1, 0)); block.Id != Water {
+				return appendFace(itype.YPlus, position, "water.png", itype.Vec3f{0, -0.125, 0}, vertexArray)
+			}
+
+			return vertexArray
+		},
+	}
+}
+func (WaterBehaviour) BlockUpdate(position itype.Vec3i, aux int, data itype.Dataset, w *world.World) bool {
+	return false
+}