mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-07-22 13:04:18 -04:00
029cb62972
* Fixed nil pointer in Copy() * Position added Added Floor() and String() methods to Vector. Also added Position which declares an embedded Vector2 and returns various forms of it. * d2vector.Vector2 renamed to d2vector.BigFloat * vector.go renamed to big_float.go * Float64 stub and more renaming * Vector value getters * Separate vector types with initial methods. * Divide and lint warnings. * Distance and Length. * Scale, Abs and Negate. * CompareFloat64Fuzzy delta direction reversed. * Refactor vector_test.go. * Renamed Approx methods. * Distance and Length. * Distance and Length. * Removed BigFloat and Vector, renamed Float64 to Vector, simplified tests. * Angle, SignedAngle and other small functions. * Receiver rename. * SingedAngle and test fixed * Rotate. * SetLength. * Cross. * NinetyAnti and NinetyClock. * Lerp and Clamp. * Reflect and ReflectSurface. * Cardinal convenience functions. * Comments. * Panic on NaN and Inf in Position. * Lint warnings and comments.
73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
package d2vector
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import (
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"fmt"
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"math"
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)
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const subTilesPerTile float64 = 5
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// Position is a vector in world space. The stored value is the one returned by Position.World()
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type Position struct {
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Vector
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}
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// NewPosition creates a new Position at the given float64 world position.
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func NewPosition(x, y float64) *Position {
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p := &Position{NewVector(x, y)}
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p.checkValues()
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return p
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}
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// Set sets this position to the given x and y values.
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func (p *Position) Set(x, y float64) {
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p.x, p.y = x, y
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p.checkValues()
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}
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func (p *Position) checkValues() {
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if math.IsNaN(p.x) || math.IsNaN(p.y) {
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panic(fmt.Sprintf("float value is NaN: %s", p.Vector))
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}
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if math.IsInf(p.x, 0) || math.IsInf(p.y, 0) {
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panic(fmt.Sprintf("float value is Inf: %s", p.Vector))
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}
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}
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// World is the position, where 1 = one map tile.
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func (p *Position) World() *Vector {
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return &p.Vector
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}
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// Tile is the tile position, always a whole number.
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func (p *Position) Tile() *Vector {
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c := p.World().Clone()
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return c.Floor()
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}
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// TileOffset is the offset from the tile position, always < 1.
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func (p *Position) TileOffset() *Vector {
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c := p.World().Clone()
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return c.Subtract(p.Tile())
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}
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// SubWorld is the position, where 5 = one map tile.
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func (p *Position) SubWorld() *Vector {
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c := p.World().Clone()
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return c.Scale(subTilesPerTile)
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}
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// SubTile is the tile position in sub tiles, always a multiple of 5.
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func (p *Position) SubTile() *Vector {
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c := p.Tile().Clone()
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return c.Scale(subTilesPerTile)
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}
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// SubTileOffset is the offset from the sub tile position in sub tiles, always < 1.
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func (p *Position) SubTileOffset() *Vector {
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c := p.SubWorld().Clone()
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return c.Subtract(p.SubTile())
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}
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