From e17dbcc2702cd67ad4e792b347c4ca1b2d73f30d Mon Sep 17 00:00:00 2001
From: Dan Bagnell <daniel.p.bagnell@gmail.com>
Date: Thu, 5 Apr 2018 15:39:31 -0400
Subject: [PATCH] Update multi-frustum tests.

---
 Specs/Renderer/AutomaticUniformSpec.js | 11 +++++++++++
 Specs/Scene/MultifrustumSpec.js        | 23 +++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/Specs/Renderer/AutomaticUniformSpec.js b/Specs/Renderer/AutomaticUniformSpec.js
index 72baabf820d2..f439c7e1af6a 100644
--- a/Specs/Renderer/AutomaticUniformSpec.js
+++ b/Specs/Renderer/AutomaticUniformSpec.js
@@ -1307,4 +1307,15 @@ defineSuite([
         }).contextToRender();
     });
 
+    it('has czm_logFarDistance', function() {
+        var fs =
+            'void main() {' +
+            '  gl_FragColor = vec4(czm_logFarDistance == (2.0 / log2(czm_currentFrustum.y + 1.0)));' +
+            '}';
+        expect({
+            context : context,
+            fragmentShader : fs
+        }).contextToRender();
+    });
+
 }, 'WebGL');
diff --git a/Specs/Scene/MultifrustumSpec.js b/Specs/Scene/MultifrustumSpec.js
index e28a5dd2099b..2bb926965d0d 100644
--- a/Specs/Scene/MultifrustumSpec.js
+++ b/Specs/Scene/MultifrustumSpec.js
@@ -63,7 +63,13 @@ defineSuite([
     var blueImage;
     var whiteImage;
 
+    var logDepth;
+
     beforeAll(function() {
+        scene = createScene();
+        logDepth = scene.logarithmicDepthBuffer;
+        scene.destroyForSpecs();
+
         return when.join(
             Resource.fetchImage('./Data/Images/Green.png').then(function(image) {
                 greenImage = image;
@@ -81,6 +87,8 @@ defineSuite([
         context = scene.context;
         primitives = scene.primitives;
 
+        scene.logarithmicDepthBuffer = false;
+
         var camera = scene.camera;
         camera.position = new Cartesian3();
         camera.direction = Cartesian3.negate(Cartesian3.UNIT_Z, new Cartesian3());
@@ -350,4 +358,19 @@ defineSuite([
         createBillboards();
         scene.renderForSpecs();
     });
+
+    it('log depth uses less frustums', function() {
+        if (!logDepth) {
+            return;
+        }
+
+        createBillboards();
+
+        scene.render();
+        expect(scene._frustumCommandsList.length).toEqual(3);
+
+        scene.logarithmicDepthBuffer = true;
+        scene.render();
+        expect(scene._frustumCommandsList.length).toEqual(1);
+    });
 }, 'WebGL');