24 lines
691 B
Go
24 lines
691 B
Go
package engine
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var (
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// Oblique projections
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CabinetProjection = ParallelProjection{0.5, 0.5}
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CavalierProjection = ParallelProjection{1, 1}
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// Axonometric projections
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ElevationProjection = ParallelProjection{0, 0}
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DimetricProjection = ParallelProjection{0, 0.5}
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HexPrismProjection = ParallelProjection{0, 0.577350269189626} // 1 ÷ √3
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IsometricProjection = ParallelProjection{0, 0.707106781186548} // 1 ÷ √2
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TrimetricProjection = ParallelProjection{0, 1}
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)
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type ParallelProjection struct {
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ZX, ZY float64
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}
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func (π ParallelProjection) Project(p Point3) (px, py float64) {
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px = float64(p.X) + π.ZX*float64(p.Z)
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py = float64(p.Y) + π.ZY*float64(p.Z)
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return px, py
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}
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