add gs

RCCService2020/internalscripts/thumbnails/modules/CreateExtentsMinMax.lua

@@ -0,0 +1,75 @@
+-- Utility function for focusing on a selection of parts in a thumbnail
+
+local FLOAT_MAX = math.huge
+
+-- 10% tolerance for meshes that are bigger than the part which contains them
+local MESH_SIZE_TOLERANCE_MULTIPLIER = 1.1
+
+local function addToBounds(cornerPosition, focusExtentsOut)
+	focusExtentsOut["minx"] = math.min(focusExtentsOut["minx"], cornerPosition.x)
+	focusExtentsOut["miny"] = math.min(focusExtentsOut["miny"], cornerPosition.y)
+	focusExtentsOut["minz"] = math.min(focusExtentsOut["minz"], cornerPosition.z)
+	focusExtentsOut["maxx"] = math.max(focusExtentsOut["maxx"], cornerPosition.x)
+	focusExtentsOut["maxy"] = math.max(focusExtentsOut["maxy"], cornerPosition.y)
+	focusExtentsOut["maxz"] = math.max(focusExtentsOut["maxz"], cornerPosition.z)
+end
+
+local function addCornerToBounds(partCFrame, cornerSelect, halfPartSize, focusExtentsOut)
+	local cornerPositionLocal = cornerSelect * halfPartSize
+	local cornerPositionWorld = partCFrame * cornerPositionLocal
+	addToBounds(cornerPositionWorld, focusExtentsOut)
+end
+
+-- Adds a tolerance for meshes in parts
+local function getPartSizeBounds(part)
+	local mesh = part:FindFirstChildWhichIsA("DataModelMesh")
+	if not mesh then
+		return part.Size
+	end
+
+	return part.Size * MESH_SIZE_TOLERANCE_MULTIPLIER
+end
+
+local CORNERS = {
+	Vector3.new( 1,  1,  1),
+	Vector3.new( 1,  1, -1),
+	Vector3.new( 1, -1,  1),
+	Vector3.new( 1, -1, -1),
+	Vector3.new(-1,  1,  1),
+	Vector3.new(-1,  1, -1),
+	Vector3.new(-1, -1,  1),
+	Vector3.new(-1, -1, -1),
+}
+
+local function CreateExtentsMinMax(focusParts)
+	local focusOnExtents = {
+		minx =  FLOAT_MAX,
+		miny =  FLOAT_MAX,
+		minz =  FLOAT_MAX,
+		maxx = -FLOAT_MAX,
+		maxy = -FLOAT_MAX,
+		maxz = -FLOAT_MAX
+	}
+
+	-- Expand focusOnExtents to bound all the parts in the focusParts table
+	for _, focusPart in ipairs(focusParts) do
+		if focusPart:IsA("BasePart") then
+			local partSize = getPartSizeBounds(focusPart)
+			local halfPartSize = partSize * 0.5
+			local partCFrame = focusPart.CFrame
+
+			for _, corner in ipairs(CORNERS) do
+				addCornerToBounds(partCFrame, corner, halfPartSize, focusOnExtents)
+			end
+		end
+	end
+
+	local extentsMinMax = {
+		Vector3.new(focusOnExtents["minx"], focusOnExtents["miny"], focusOnExtents["minz"]),
+		Vector3.new(focusOnExtents["maxx"], focusOnExtents["maxy"], focusOnExtents["maxz"])
+	}
+
+	return extentsMinMax
+end
+
+return CreateExtentsMinMax