koobas.hobune.stream
Is it possible to modify a material/shader in code?
Hello, Im creating a simple Vr project where i am attempting to mix two "chemicals". I followed a nice video on a pouring effect by VR with ANdrew. He uses a panning diffuse shader to create a very nice stream. I am attempting to modify this stream if I pour a red chemical into a blue chemical i want the blue chemical to turn to pink and its stream to reflect that. I can change the vials contents etc however i cannot seem to change the stream as i cant seem to effect the material and or shader thats drawing it. Here is the shader:
Properties
{
_MainTex ("Sprite Texture", 2D) = "white" {}
_Color ("Tint", Color) = (1,1,1,1)
_Speed("Speed", float) = 0.0
[MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
[HideInInspector] _RendererColor ("RendererColor", Color) = (1,1,1,1)
[HideInInspector] _Flip ("Flip", Vector) = (1,1,1,1)
[PerRendererData] _AlphaTex ("External Alpha", 2D) = "white" {}
[PerRendererData] _EnableExternalAlpha ("Enable External Alpha", Float) = 0
}
Here is one of my attempts to force change the stream
private void Awake()
{
//chemicalColor = GetComponent<Material>().color;
lineRenderer = GetComponent<LineRenderer>();
Material mat = lineRenderer.material;
mat.color = Color.green;
//float alpha = 1.0f;
//Gradient gradient = new Gradient();
//gradient.SetKeys(
// new GradientColorKey[] { new GradientColorKey(Color.green, 0.0f), new GradientColorKey(Color.red, 1.0f) },
// new GradientAlphaKey[] { new GradientAlphaKey(alpha, 0.0f), new GradientAlphaKey(alpha, 1.0f) }
//);
//lineRenderer.colorGradient = gradient;
print("Hello");
splashParticle = GetComponentInChildren<ParticleSystem>();
}
To change a variable inside a shader you need to use the Set_ functions on the material.
So to change the tint to green you'd use: mat.SetColor("_Color", Color.green);
Setting this via string can however be a little expensive so you can improve this by caching the nameId: private static readonly int ColorShaderId = Shader.PropertyToID("_Color");
Did you have any success with this? If not then let me know but if so please accept my answer! :)
