Fix build*Shader methods in instance mode by forwarding optional scope

src/webgl/material.js

@@ -732,15 +732,17 @@ function material(p5, fn) {
    * @beta
    * @submodule p5.strands
    * @param {Function} callback A function building a p5.strands shader.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The material shader
    */
   /**
    * @method buildFilterShader
    * @param {Object} hooks An object specifying p5.strands hooks in GLSL.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The material shader
    */
-  fn.buildFilterShader = function (callback) {
-    return this.baseFilterShader().modify(callback);
+  fn.buildFilterShader = function (callback, scope) {
+    return this.baseFilterShader().modify(callback, scope);
   };
 
   /**
@@ -1560,15 +1562,17 @@ function material(p5, fn) {
    * @submodule p5.strands
    * @beta
    * @param {Function} callback A function building a p5.strands shader.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The material shader.
    */
   /**
    * @method buildMaterialShader
    * @param {Object} hooks An object specifying p5.strands hooks in GLSL.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The material shader.
    */
-  fn.buildMaterialShader = function (cb) {
-    return this.baseMaterialShader().modify(cb);
+  fn.buildMaterialShader = function (cb, scope) {
+    return this.baseMaterialShader().modify(cb, scope);
   };
 
   /**
@@ -1776,15 +1780,17 @@ function material(p5, fn) {
    * @submodule p5.strands
    * @beta
    * @param {Function} callback A function building a p5.strands shader.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The normal shader.
    */
   /**
    * @method buildNormalShader
    * @param {Object} hooks An object specifying p5.strands hooks in GLSL.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The normal shader.
    */
-  fn.buildNormalShader = function (cb) {
-    return this.baseNormalShader().modify(cb);
+  fn.buildNormalShader = function (cb, scope) {
+    return this.baseNormalShader().modify(cb, scope);
   };
 
   /**
@@ -1940,15 +1946,17 @@ function material(p5, fn) {
    * @submodule p5.strands
    * @beta
    * @param {Function} callback A function building a p5.strands shader.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The color shader.
    */
   /**
    * @method buildColorShader
    * @param {Object} hooks An object specifying p5.strands hooks in GLSL.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The color shader.
    */
-  fn.buildColorShader = function (cb) {
-    return this.baseColorShader().modify(cb);
+  fn.buildColorShader = function (cb, scope) {
+    return this.baseColorShader().modify(cb, scope);
   };
 
   /**
@@ -2195,15 +2203,17 @@ function material(p5, fn) {
    * @submodule p5.strands
    * @beta
    * @param {Function} callback A function building a p5.strands shader.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The stroke shader.
    */
   /**
    * @method buildStrokeShader
    * @param {Object} hooks An object specifying p5.strands hooks in GLSL.
+   * @param {Object} [scope] An optional scope object passed to .modify().
    * @returns {p5.Shader} The stroke shader.
    */
-  fn.buildStrokeShader = function (cb) {
-    return this.baseStrokeShader().modify(cb);
+  fn.buildStrokeShader = function (cb, scope) {
+    return this.baseStrokeShader().modify(cb, scope);
   };
 
   /**

test/unit/webgl/p5.Shader.js

@@ -459,6 +459,21 @@ suite('p5.Shader', function() {
       }).not.toThrowError();
     });
 
+    test('buildMaterialShader forwards scope to modify', () => {
+      myp5.createCanvas(5, 5, myp5.WEBGL);
+      expect(() => {
+        const myShader = myp5.buildMaterialShader(() => {
+          myp5.getPixelInputs(inputs => {
+            inputs.color = [1, 0, 0, 1];
+            return inputs;
+          });
+        }, { myp5 });
+        myp5.noStroke();
+        myp5.shader(myShader);
+        myp5.plane(myp5.width, myp5.height);
+      }).not.toThrowError();
+    });
+
 test('returns numbers for builtin globals outside hooks and a strandNode when called inside hooks', () => {
   myp5.createCanvas(5, 5, myp5.WEBGL);
   myp5.baseMaterialShader().modify(() => {