Initial import of KREngine

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extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%404

KREngine/KREngine/Classes/KRInstance.cpp

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+//
+//  KRInstance.cpp
+//  KREngine
+//
+//  Created by Kearwood Gilbert on 11-09-29.
+//  Copyright 2011 Kearwood Software. All rights reserved.
+//
+
+#include <iostream>
+#import "KRInstance.h"
+
+KRInstance::KRInstance(KRModel *pModel, const KRMat4 modelMatrix) {
+    m_pModel = pModel;
+    m_modelMatrix = modelMatrix;
+}
+
+KRInstance::~KRInstance() {
+    
+}
+
+KRMat4 &KRInstance::getModelMatrix() {
+    return m_modelMatrix;
+}
+KRModel *KRInstance::getModel() {
+    return m_pModel;
+}
+
+void KRInstance::render(KRCamera *pCamera, KRMaterialManager *pMaterialManager, bool bRenderShadowMap, KRMat4 &viewMatrix, Vector3 &cameraPosition, Vector3 &lightDirection, KRMat4 *pShadowMatrices, GLuint *shadowDepthTextures, int cShadowBuffers) {
+    
+    KRMat4 projectionMatrix;
+    if(!bRenderShadowMap) {
+        projectionMatrix = pCamera->getProjectionMatrix();
+    }
+    KRMat4 mvpmatrix = m_modelMatrix * viewMatrix * projectionMatrix;
+    
+    // Transform location of camera to object space for calculation of specular halfVec
+    KRMat4 inverseModelMatrix = m_modelMatrix;
+    inverseModelMatrix.invert();
+    Vector3 cameraPosObject = inverseModelMatrix.dot(cameraPosition);
+    Vector3 lightDirObject = inverseModelMatrix.dot(lightDirection);
+    
+    m_pModel->render(pCamera, pMaterialManager, bRenderShadowMap, mvpmatrix, cameraPosObject, lightDirection, pShadowMatrices, shadowDepthTextures, cShadowBuffers);
+    
+}
+
+KRBoundingVolume KRInstance::getExtents() {
+    return KRBoundingVolume(Vector3(m_pModel->getMinX(), m_pModel->getMinY(), m_pModel->getMinZ()), Vector3(m_pModel->getMaxX(), m_pModel->getMaxY(), m_pModel->getMaxZ()), m_modelMatrix);
+}