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Merge pull request #444 from solidsign/feature/UIParticleSystem_use_lengthScale 

Add using lengthScale to UIParticleSystem
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Simon (Darkside) Jackson 2023-07-22 16:11:13 +01:00 committed by GitHub
parent 0a424334e9 0dd1e6d7bb
commit 90fd22498f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 6 deletions
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27
Runtime/Scripts/Effects/UIParticleSystem.cs
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@ -16,6 +16,9 @@ namespace UnityEngine.UI.Extensions
[Tooltip("Enables 3d rotation for the particles")] [Tooltip("Enables 3d rotation for the particles")]
public bool use3dRotation = false; public bool use3dRotation = false;
[Tooltip("Enables using Renderer.lengthScale parameter")]
public bool _useLengthScale = false;
private Transform _transform; private Transform _transform;
private ParticleSystem pSystem; private ParticleSystem pSystem;
private ParticleSystem.Particle[] particles; private ParticleSystem.Particle[] particles;
@ -183,8 +186,6 @@ namespace UnityEngine.UI.Extensions
#else #else
Vector2 position = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position)); Vector2 position = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
#endif #endif
float rotation = -particle.rotation * Mathf.Deg2Rad;
float rotation90 = rotation + Mathf.PI / 2;
Color32 color = particle.GetCurrentColor(pSystem); Color32 color = particle.GetCurrentColor(pSystem);
float size = particle.GetCurrentSize(pSystem) * 0.5f; float size = particle.GetCurrentSize(pSystem) * 0.5f;
@ -280,13 +281,29 @@ namespace UnityEngine.UI.Extensions
_quad[3].color = color; _quad[3].color = color;
_quad[3].uv0 = temp; _quad[3].uv0 = temp;
float rotation = -particle.rotation * Mathf.Deg2Rad;
var lengthScale = pRenderer.lengthScale;
if (_useLengthScale)
{
// rotate towards velocity
var normalizedVelocity = particle.velocity.normalized;
rotation = Mathf.Atan2(normalizedVelocity.y, normalizedVelocity.x);
}
else
{
lengthScale = 1f;
}
float rotation90 = rotation + Mathf.PI / 2;
if (rotation == 0) if (rotation == 0)
{ {
// no rotation // no rotation
corner1.x = position.x - size; corner1.x = position.x - size;
corner1.y = position.y - size; corner1.y = position.y - size * lengthScale;
corner2.x = position.x + size; corner2.x = position.x + size;
corner2.y = position.y + size; corner2.y = position.y + size * lengthScale;
temp.x = corner1.x; temp.x = corner1.x;
temp.y = corner1.y; temp.y = corner1.y;
@ -339,7 +356,7 @@ namespace UnityEngine.UI.Extensions
else else
{ {
// apply rotation // apply rotation
Vector2 right = new Vector2(Mathf.Cos(rotation), Mathf.Sin(rotation)) * size; Vector2 right = new Vector2(Mathf.Cos(rotation), Mathf.Sin(rotation)) * size * lengthScale;
Vector2 up = new Vector2(Mathf.Cos(rotation90), Mathf.Sin(rotation90)) * size; Vector2 up = new Vector2(Mathf.Cos(rotation90), Mathf.Sin(rotation90)) * size;
_quad[0].position = position - right - up; _quad[0].position = position - right - up;