67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
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package world
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import (
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"fmt"
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"github.com/df-mc/dragonfly/server/block/cube"
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"github.com/go-gl/mathgl/mgl64"
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"math"
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)
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// ChunkPos holds the position of a chunk. The type is provided as a utility struct for keeping track of a
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// chunk's position. Chunks do not themselves keep track of that. Chunk positions are different from block
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// positions in the way that increasing the X/Z by one means increasing the absolute value on the X/Z axis in
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// terms of blocks by 16.
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type ChunkPos [2]int32
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// String implements fmt.Stringer and returns (x, z).
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func (p ChunkPos) String() string {
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return fmt.Sprintf("(%v, %v)", p[0], p[1])
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}
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// X returns the X coordinate of the chunk position.
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func (p ChunkPos) X() int32 {
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return p[0]
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}
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// Z returns the Z coordinate of the chunk position.
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func (p ChunkPos) Z() int32 {
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return p[1]
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}
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// SubChunkPos holds the position of a sub-chunk. The type is provided as a utility struct for keeping track of a
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// sub-chunk's position. Sub-chunks do not themselves keep track of that. Sub-chunk positions are different from
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// block positions in the way that increasing the X/Y/Z by one means increasing the absolute value on the X/Y/Z axis in
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// terms of blocks by 16.
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type SubChunkPos [3]int32
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// String implements fmt.Stringer and returns (x, y, z).
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func (p SubChunkPos) String() string {
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return fmt.Sprintf("(%v, %v, %v)", p[0], p[1], p[2])
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}
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// X returns the X coordinate of the sub-chunk position.
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func (p SubChunkPos) X() int32 {
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return p[0]
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}
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// Y returns the Y coordinate of the sub-chunk position.
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func (p SubChunkPos) Y() int32 {
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return p[1]
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}
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// Z returns the Z coordinate of the sub-chunk position.
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func (p SubChunkPos) Z() int32 {
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return p[2]
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}
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// chunkPosFromVec3 returns a chunk position from the Vec3 passed. The coordinates of the chunk position are
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// those of the Vec3 divided by 16, then rounded down.
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func chunkPosFromVec3(vec3 mgl64.Vec3) ChunkPos {
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return ChunkPos{int32(math.Floor(vec3[0])) >> 4, int32(math.Floor(vec3[2])) >> 4}
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}
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// chunkPosFromBlockPos returns the ChunkPos of the chunk that a block at a cube.Pos is in.
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func chunkPosFromBlockPos(p cube.Pos) ChunkPos {
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return ChunkPos{int32(p[0] >> 4), int32(p[2] >> 4)}
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}
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