52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
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package trace
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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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"github.com/go-gl/mathgl/mgl64"
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)
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// EntityResult is the result of a ray trace collision with an entities bounding box.
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type EntityResult struct {
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bb cube.BBox
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pos mgl64.Vec3
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face cube.Face
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entity world.Entity
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}
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// BBox returns the entities bounding box that was collided with.
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func (r EntityResult) BBox() cube.BBox {
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return r.bb
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}
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// Position ...
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func (r EntityResult) Position() mgl64.Vec3 {
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return r.pos
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}
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// Face ...
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func (r EntityResult) Face() cube.Face {
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return r.face
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}
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// Entity returns the entity that was collided with.
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func (r EntityResult) Entity() world.Entity {
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return r.entity
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}
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// EntityIntercept performs a ray trace and calculates the point on the entities bounding box's edge nearest to the start position
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// that the ray collided with.
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// EntityIntercept returns an EntityResult with the entity collided with and with the colliding vector closest to the start position,
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// if no colliding point was found, a zero BlockResult is returned ok is false.
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func EntityIntercept(e world.Entity, start, end mgl64.Vec3) (result EntityResult, ok bool) {
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bb := e.H().Type().BBox(e).Translate(e.Position()).Grow(0.3)
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r, ok := BBoxIntercept(bb, start, end)
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if !ok {
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return
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}
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return EntityResult{bb: bb, pos: r.Position(), face: r.Face(), entity: e}, true
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}
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