fix directionalLights in samples & tests

Author: Spongman

src/webgl/light.js

@@ -137,8 +137,8 @@ p5.prototype.ambientLight = function(v1, v2, v3, a) {
  *   background(0);
  *   //move your mouse to change light direction
  *   var dirX = (mouseX / width - 0.5) * 2;
- *   var dirY = (mouseY / height - 0.5) * -2;
- *   directionalLight(250, 250, 250, dirX, dirY, 0.25);
+ *   var dirY = (mouseY / height - 0.5) * 2;
+ *   directionalLight(250, 250, 250, -dirX, -dirY, 0.25);
  *   ambientMaterial(250);
  *   sphere(50);
  * }

src/webgl/p5.RendererGL.js

@@ -297,7 +297,7 @@ p5.RendererGL.prototype._resetContext = function(attr, options, callback) {
  * function draw() {
  *   var t = millis() / 1000 + 1000;
  *   background(0);
- *   directionalLight(color('#222'), -1, -1, 1);
+ *   directionalLight(color('#222'), 1, 1, 1);
  *
  *   for (var i = 0; i < lights.length; i++) {
  *     var light = lights[i];

test/manual-test-examples/webgl/customShader/toonShader/sketch.js

@@ -17,7 +17,7 @@ function draw () {
   background(0);
   var dirY = (mouseY / height - 0.5) * 2;
   var dirX = (mouseX / width - 0.5) * 2;
-  directionalLight(255, 204, 204, -dirX, dirY, -1);
+  directionalLight(255, 204, 204, -dirX, -dirY, -1);
   ambientMaterial(0, 255, 255);
   sphere(120);
 }

test/manual-test-examples/webgl/lights/directionalLight/sketch.js

@@ -1,5 +1,6 @@
 function setup(){
   createCanvas(windowWidth, windowHeight, WEBGL);
+  //setAttributes('perPixelLighting', true);
 }
 
 function draw(){
@@ -9,7 +10,7 @@ function draw(){
   var dirX = (mouseX / width - 0.5) *2;
 
   ambientLight(50);
-  directionalLight(250, 250, 250, dirX, -dirY, 0.25);
+  directionalLight(250, 250, 250, -dirX, -dirY, 0);
 
   ambientMaterial(250);
   sphere(50, 64);

test/manual-test-examples/webgl/material/perPixelLighting/sketch.js

@@ -19,7 +19,7 @@ function draw() {
   var t = millis() / 1000 + 1000;
   background(0);
 
-  directionalLight(color('#111'), -1, -1, -1);
+  directionalLight(color('#111'), 1, 1, 1);
 
   for (var i = 0; i < lights.length; i++) {
     var light = lights[i];