TarnaWijaya
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67 lines
2.3 KiB
Go
67 lines
2.3 KiB
Go
package model
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import (
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"github.com/df-mc/dragonfly/server/block/cube"
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"github.com/df-mc/dragonfly/server/world"
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)
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// Thin is a model for thin, partial blocks such as a glass pane or an iron bar. It changes its bounding box depending
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// on solid faces next to it.
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type Thin struct{}
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const (
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thinHeight = 1
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thinInset = 7.0 / 16.0
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)
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// BBox returns a slice of physics.BBox that depends on the blocks surrounding the Thin block. Thin blocks can connect
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// to any other Thin block, wall or solid faces of other blocks.
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func (t Thin) BBox(pos cube.Pos, s world.BlockSource) []cube.BBox {
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boxes := make([]cube.BBox, 0, 2)
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// Check if we have any connections on the Z axis
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connectWest, connectEast := t.checkConnection(pos, cube.FaceWest, s), t.checkConnection(pos, cube.FaceEast, s)
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if connectWest || connectEast {
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box := cube.Box(0, 0, 0, 1, thinHeight, 1).Stretch(cube.Z, -thinInset)
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if !connectWest {
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box = box.ExtendTowards(cube.FaceWest, -thinInset)
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} else if !connectEast {
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box = box.ExtendTowards(cube.FaceEast, -thinInset)
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}
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boxes = append(boxes, box)
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}
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// Check if we have any connections on the X axis
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connectNorth, connectSouth := t.checkConnection(pos, cube.FaceNorth, s), t.checkConnection(pos, cube.FaceSouth, s)
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if connectNorth || connectSouth {
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box := cube.Box(0, 0, 0, 1, thinHeight, 1).Stretch(cube.X, -thinInset)
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if !connectNorth {
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box = box.ExtendTowards(cube.FaceNorth, -thinInset)
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} else if !connectSouth {
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box = box.ExtendTowards(cube.FaceSouth, -thinInset)
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}
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boxes = append(boxes, box)
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}
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// If no connections, create a center post box
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if len(boxes) == 0 {
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boxes = append(boxes, cube.Box(0, 0, 0, 1, thinHeight, 1).Stretch(cube.X, -thinInset).Stretch(cube.Z, -thinInset))
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}
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return boxes
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}
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// FaceSolid returns true if the face passed is cube.FaceDown.
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func (t Thin) FaceSolid(_ cube.Pos, face cube.Face, _ world.BlockSource) bool {
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return face == cube.FaceDown
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}
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// checkConnection checks if the block at the given position and face has a connection to the current thin block.
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func (t Thin) checkConnection(pos cube.Pos, face cube.Face, s world.BlockSource) bool {
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sidePos := pos.Side(face)
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sideBlock := s.Block(sidePos)
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_, isThin := sideBlock.Model().(Thin)
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_, isWall := sideBlock.Model().(Wall)
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return isThin || isWall || sideBlock.Model().FaceSolid(sidePos, face.Opposite(), s)
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}
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