UnrealXR/raylib-go
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vector2 divide/multiply/lerp added

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This commit is contained in:
andygeiss 2020-06-25 22:49:39 +02:00
parent e0f56b2275
commit e8f72b37c9
1 changed files with 27 additions and 12 deletions
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39
raymath/raymath.go
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@ -34,7 +34,7 @@ func Vector2Length(v rl.Vector2) float32 {
// Vector2DotProduct - Calculate two vectors dot product
func Vector2DotProduct(v1, v2 rl.Vector2) float32 {
return (v1.X*v2.X + v1.Y*v2.Y)
return v1.X*v2.X + v1.Y*v2.Y
}
// Vector2Distance - Calculate distance between two vectors
@ -59,6 +59,11 @@ func Vector2Scale(v *rl.Vector2, scale float32) {
v.Y *= scale
}
// Vector2Multiply - Multiply vector by vector
func Vector2Multiply(v1, v2 *rl.Vector2) rl.Vector2 {
return rl.NewVector2(v1.X*v2.X, v1.Y*v2.Y)
}
// Vector2Negate - Negate vector
func Vector2Negate(v *rl.Vector2) {
v.X = -v.X
@ -71,11 +76,21 @@ func Vector2Divide(v *rl.Vector2, div float32) {
v.Y = v.Y / div
}
// Vector2DivideV - Divide vector by vector
func Vector2DivideV(v1, v2 *rl.Vector2) rl.Vector2 {
return rl.NewVector2(v1.X/v2.X, v1.Y/v2.Y)
}
// Vector2Normalize - Normalize provided vector
func Vector2Normalize(v *rl.Vector2) {
Vector2Divide(v, Vector2Length(*v))
}
// Vector2Lerp - Calculate linear interpolation between two vectors
func Vector2Lerp(v1, v2 *rl.Vector2, amount float32) rl.Vector2 {
return rl.NewVector2(v1.X+amount*(v2.X-v1.X), v1.Y+amount*(v2.Y-v1.Y))
}
// Vector2CrossProduct - Calculate two vectors cross product
func Vector2CrossProduct(v1, v2 rl.Vector2) float32 {
return v1.X*v2.Y - v1.Y*v2.X
@ -724,9 +739,9 @@ func MatrixPerspective(fovy, aspect, near, far float32) rl.Matrix {
func MatrixOrtho(left, right, bottom, top, near, far float32) rl.Matrix {
var result rl.Matrix
rl := (right - left)
tb := (top - bottom)
fn := (far - near)
rl := right - left
tb := top - bottom
fn := far - near
result.M0 = 2.0 / rl
result.M1 = 0.0
@ -851,18 +866,18 @@ func QuaternionSlerp(q1, q2 rl.Quaternion, amount float32) rl.Quaternion {
sinHalfTheta := float32(math.Sqrt(float64(1.0 - cosHalfTheta*cosHalfTheta)))
if math.Abs(float64(sinHalfTheta)) < 0.001 {
result.X = (q1.X*0.5 + q2.X*0.5)
result.Y = (q1.Y*0.5 + q2.Y*0.5)
result.Z = (q1.Z*0.5 + q2.Z*0.5)
result.W = (q1.W*0.5 + q2.W*0.5)
result.X = q1.X*0.5 + q2.X*0.5
result.Y = q1.Y*0.5 + q2.Y*0.5
result.Z = q1.Z*0.5 + q2.Z*0.5
result.W = q1.W*0.5 + q2.W*0.5
} else {
ratioA := float32(math.Sin(float64((1-amount)*halfTheta))) / sinHalfTheta
ratioB := float32(math.Sin(float64(amount*halfTheta))) / sinHalfTheta
result.X = (q1.X*ratioA + q2.X*ratioB)
result.Y = (q1.Y*ratioA + q2.Y*ratioB)
result.Z = (q1.Z*ratioA + q2.Z*ratioB)
result.W = (q1.W*ratioA + q2.W*ratioB)
result.X = q1.X*ratioA + q2.X*ratioB
result.Y = q1.Y*ratioA + q2.Y*ratioB
result.Z = q1.Z*ratioA + q2.Z*ratioB
result.W = q1.W*ratioA + q2.W*ratioB
}
}