Add animated shader properties

Author: adamgraham

Runtime/AnimatedShaderProperty.cs

@@ -0,0 +1,158 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Zigurous.Graphics
+{
+    /// <summary>
+    /// A shader property that can be animated.
+    /// </summary>
+    [System.Serializable]
+    public abstract class AnimatedShaderProperty
+    {
+        /// <summary>
+        /// The shader property to animate.
+        /// </summary>
+        [Tooltip("The shader property to animate.")]
+        public ShaderProperty property;
+
+        /// <summary>
+        /// Creates a new animated shader property.
+        /// </summary>
+        /// <param name="property">The shader property to animate.</param>
+        public AnimatedShaderProperty(string property)
+        {
+            this.property = property;
+        }
+
+        /// <summary>
+        /// Animates the shader property.
+        /// </summary>
+        /// <param name="material">The material to animate.</param>
+        /// <param name="time">The time of the animation to evaluate.</param>
+        public abstract void Animate(Material material, float time);
+
+    }
+
+    /// <summary>
+    /// A shader float property that can be animated.
+    /// </summary>
+    [System.Serializable]
+    public class AnimatedShaderFloatProperty : AnimatedShaderProperty
+    {
+        /// <summary>
+        /// The value over time of the shader property.
+        /// </summary>
+        [Tooltip("The value over time of the shader property.")]
+        public AnimationCurve valueOverTime;
+
+        /// <summary>
+        /// Creates a new animated shader float property.
+        /// </summary>
+        /// <param name="valueOverTime">The value over time of the shader property.</param>
+        /// <param name="property">The shader property to animate.</param>
+        public AnimatedShaderFloatProperty(AnimationCurve valueOverTime, string property) : base(property)
+        {
+            this.valueOverTime = valueOverTime;
+        }
+
+        /// <inheritdoc />
+        public override void Animate(Material material, float time)
+        {
+            material.SetFloat(this.property.id, this.valueOverTime.Evaluate(time));
+        }
+
+    }
+
+    /// <summary>
+    /// A shader int property that can be animated.
+    /// </summary>
+    [System.Serializable]
+    public class AnimatedShaderIntProperty : AnimatedShaderProperty
+    {
+        /// <summary>
+        /// The value over time of the shader property.
+        /// </summary>
+        [Tooltip("The value over time of the shader property.")]
+        public AnimationCurve valueOverTime;
+
+        /// <summary>
+        /// Creates a new animated shader int property.
+        /// </summary>
+        /// <param name="valueOverTime">The value over time of the shader property.</param>
+        /// <param name="property">The shader property to animate.</param>
+        public AnimatedShaderIntProperty(AnimationCurve valueOverTime, string property) : base(property)
+        {
+            this.valueOverTime = valueOverTime;
+        }
+
+        /// <inheritdoc />
+        public override void Animate(Material material, float time)
+        {
+            material.SetInt(this.property.id, (int)this.valueOverTime.Evaluate(time));
+        }
+
+    }
+
+    /// <summary>
+    /// A shader color property that can be animated.
+    /// </summary>
+    [System.Serializable]
+    public class AnimatedShaderColorProperty : AnimatedShaderProperty
+    {
+        /// <summary>
+        /// The color over time of the shader property.
+        /// </summary>
+        public Gradient colorOverTime;
+
+        /// <summary>
+        /// Creates a new animated shader color property.
+        /// </summary>
+        /// <param name="colorOverTime">The color over time of the shader property.</param>
+        /// <param name="property">The shader property to animate.</param>
+        public AnimatedShaderColorProperty(Gradient colorOverTime, string property) : base(property)
+        {
+            this.colorOverTime = colorOverTime;
+        }
+
+        /// <inheritdoc />
+        public override void Animate(Material material, float time)
+        {
+            material.SetColor(this.property.id, this.colorOverTime.Evaluate(time));
+        }
+
+    }
+
+    /// <summary>
+    /// Extension methods for <see cref="AnimatedShaderProperty"/>.
+    /// </summary>
+    public static class AnimatedShaderPropertyExtensions
+    {
+        /// <summary>
+        /// Animates an array of shader properties.
+        /// </summary>
+        /// <param name="properties">The shader properties to animate.</param>
+        /// <param name="material">The material to animate.</param>
+        /// <param name="time">The time of the animation to evaluate.</param>
+        public static void Animate(this AnimatedShaderProperty[] properties, Material material, float time)
+        {
+            for (int i = 0; i < properties.Length; i++) {
+                properties[i].Animate(material, time);
+            }
+        }
+
+        /// <summary>
+        /// Animates an array of shader properties.
+        /// </summary>
+        /// <param name="properties">The shader properties to animate.</param>
+        /// <param name="material">The material to animate.</param>
+        /// <param name="time">The time of the animation to evaluate.</param>
+        public static void Animate(this List<AnimatedShaderProperty> properties, Material material, float time)
+        {
+            foreach (AnimatedShaderProperty property in properties) {
+                property.Animate(material, time);
+            }
+        }
+
+    }
+
+}