add a few lights to the scene

src/gamelogic.cpp

@@ -37,6 +37,7 @@ SceneNode* rootNode;
 SceneNode* boxNode;
 SceneNode* ballNode;
 SceneNode* padNode;
+std::vector<SceneNode*> lightNodes;
 
 double ballRadius = 3.0f;
 
@@ -127,6 +128,34 @@ void initGame(GLFWwindow* window, CommandLineOptions gameOptions) {
     padNode  = createSceneNode();
     ballNode = createSceneNode();
 
+    for (int i = 0; i < 3; i++) {
+        auto lightNode = new SceneNode();
+        lightNode->nodeType = POINT_LIGHT;
+        lightNode->lightIdx = i;
+        lightNodes.push_back(lightNode);
+    }
+
+    auto ceilingLight = lightNodes.at(0);
+    auto padLight = lightNodes.at(1);
+    auto ballLight = lightNodes.at(2);
+
+    ceilingLight->position = {
+        boxDimensions.x / 2,
+        boxDimensions.y,
+        boxDimensions.z / 2
+    };
+    rootNode->children.push_back(ceilingLight);
+
+    padLight->position = {
+        padPositionX,
+        50,
+        padPositionZ
+    };
+    padNode->children.push_back(padLight);
+
+    ballLight->position = ballPosition;
+    ballNode->children.push_back(ballLight);
+
     rootNode->children.push_back(boxNode);
     rootNode->children.push_back(padNode);
     rootNode->children.push_back(ballNode);

src/sceneGraph.hpp

@@ -8,8 +8,8 @@
 #include <vector>
 #include <cstdio>
 #include <stdbool.h>
-#include <cstdlib> 
-#include <ctime> 
+#include <cstdlib>
+#include <ctime>
 #include <chrono>
 #include <fstream>
 
@@ -29,12 +29,13 @@ struct SceneNode {
 
         nodeType = GEOMETRY;
 
+        lightIdx = -1;
 	}
 
 	// A list of all children that belong to this node.
 	// For instance, in case of the scene graph of a human body shown in the assignment text, the "Upper Torso" node would contain the "Left Arm", "Right Arm", "Head" and "Lower Torso" nodes in its list of children.
 	std::vector<SceneNode*> children;
-	
+
 	// The node's position and rotation relative to its parent
 	glm::vec3 position;
 	glm::vec3 rotation;
@@ -52,6 +53,9 @@ struct SceneNode {
 
 	// Node type is used to determine how to handle the contents of a node
 	SceneNodeType nodeType;
+
+	// indexes into global array of light nodes
+	unsigned int lightIdx;
 };
 
 SceneNode* createSceneNode();
@@ -59,4 +63,4 @@ void addChild(SceneNode* parent, SceneNode* child);
 void printNode(SceneNode* node);
 int totalChildren(SceneNode* parent);
 
-// For more details, see SceneGraph.cpp.
+// For more details, see SceneGraph.cpp.