Moved ambient lights out of SkLight's light array

samplecode/SampleShadowing.cpp

Index: samplecode/SampleShadowing.cpp
diff --git a/samplecode/SampleShadowing.cpp b/samplecode/SampleShadowing.cpp
index 4892f9c27df5c97eb27bd38175a2f59ac5082aac..afc78edee847d6557df562d9048959cbaed6b58b 100644
--- a/samplecode/SampleShadowing.cpp
+++ b/samplecode/SampleShadowing.cpp
@@ -25,7 +25,14 @@ public:
         , fLightDepth(300.0f)  {
         this->setBGColor(0xFFCCCCCC);
 

[robertphillips, 2016/08/26 17:31:28]

??

-        this->updateLights(200, 200);
+        this->setBGColor(0xFFCCCCCC);
+        SkLights::Builder builder;
+        builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(0.2f, 0.3f, 0.4f),
+                                                     SkVector3::Make(0.2f, 0.05f, 1.0f)));
+        builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(0.4f, 0.3f, 0.2f),
+                                                     SkVector3::Make(0.05f, 0.2f, 1.0f)));
+        builder.setAmbientLightColor(SkColor3f::Make(0.4f, 0.4f, 0.4f));
+        fLights = builder.finish();
 
         fTestRects[0].fColor = 0xFFEE8888;
         fTestRects[0].fDepth = 80;
@@ -205,7 +212,23 @@ protected:
 
         if (fMoveLight) {
             if (dx != 0 || dy != 0) {

[robertphillips, 2016/08/26 17:31:28]

??

-                this->updateLights(x, y);
+                float recipX = 1.0f / kWidth;
+                float recipY = 1.0f / kHeight;
+
+                SkLights::Builder builder;
+                builder.add(SkLights::Light::MakeDirectional(
+                        SkColor3f::Make(0.2f, 0.3f, 0.4f),
+                        SkVector3::Make(0.2f + (200.0f - x) * recipX,
+                                        0.05f + (200.0f - y) * recipY,
+                                        1.0f)));
+                builder.add(SkLights::Light::MakeDirectional(
+                        SkColor3f::Make(0.4f, 0.3f, 0.2f),
+                        SkVector3::Make(0.05f + (200.0f - x) * recipX,
+                                        0.2f + (200.0f - y) * recipY,
+                                        1.0f)));
+                builder.setAmbientLightColor(SkColor3f::Make(0.4f, 0.4f, 0.4f));
+                fLights = builder.finish();
+
                 fLightsChanged = true;
                 this->inval(nullptr);
             }