IliaDenisov
91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
package world
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// PrimitiveID is a compact stable identifier for primitives stored in the World.
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// It is allocated by the World and may be reused after deletion (free-list).
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type PrimitiveID uint32
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// MapItem is the common interface implemented by all world primitives.
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type MapItem interface {
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ID() PrimitiveID
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}
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// Point is a point primitive in fixed-point world coordinates.
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type Point struct {
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Id PrimitiveID
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X, Y int
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// Priority controls per-object draw ordering. Smaller draws earlier.
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Priority int
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// StyleID references a resolved style in the world's style table.
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StyleID StyleID
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// HitSlopPx expands hit-test radius in screen pixels (per-object override).
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// 0 means "use primitive default".
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HitSlopPx int
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}
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// Line is a line segment primitive in fixed-point world coordinates.
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type Line struct {
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Id PrimitiveID
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X1, Y1 int
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X2, Y2 int
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// Priority controls per-object draw ordering. Smaller draws earlier.
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Priority int
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// StyleID references a resolved style in the world's style table.
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StyleID StyleID
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// HitSlopPx expands hit-test radius in screen pixels (per-object override).
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// 0 means "use primitive default".
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HitSlopPx int
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}
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// Circle is a circle primitive in fixed-point world coordinates.
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type Circle struct {
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Id PrimitiveID
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X, Y int
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Radius int
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// Priority controls per-object draw ordering. Smaller draws earlier.
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Priority int
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// StyleID references a resolved style in the world's style table.
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StyleID StyleID
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// HitSlopPx expands hit-test radius in screen pixels (per-object override).
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// 0 means "use primitive default".
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HitSlopPx int
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}
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// ID returns the point identifier.
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func (p Point) ID() PrimitiveID { return p.Id }
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// ID returns the line identifier.
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func (l Line) ID() PrimitiveID { return l.Id }
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// ID returns the circle identifier.
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func (c Circle) ID() PrimitiveID { return c.Id }
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// MinX returns the minimum X endpoint coordinate of the line.
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func (l Line) MinX() int { return min(l.X1, l.X2) }
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// MaxX returns the maximum X endpoint coordinate of the line.
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func (l Line) MaxX() int { return max(l.X1, l.X2) }
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// MinY returns the minimum Y endpoint coordinate of the line.
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func (l Line) MinY() int { return min(l.Y1, l.Y2) }
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// MaxY returns the maximum Y endpoint coordinate of the line.
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func (l Line) MaxY() int { return max(l.Y1, l.Y2) }
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// MinX returns the minimum X coordinate of the circle bbox.
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func (c Circle) MinX() int { return c.X - c.Radius }
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// MaxX returns the maximum X coordinate of the circle bbox.
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func (c Circle) MaxX() int { return c.X + c.Radius }
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// MinY returns the minimum Y coordinate of the circle bbox.
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func (c Circle) MinY() int { return c.Y - c.Radius }
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// MaxY returns the maximum Y coordinate of the circle bbox.
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func (c Circle) MaxY() int { return c.Y + c.Radius }
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