Added KRSkyBox as new KRNode instance

--HG-- extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4078
2012-08-23 23:18:45 +00:00
parent 4b7163aa48
commit bbfb04347c
4 changed files with 115 additions and 1 deletions
--- a/KREngine/KREngine/Classes/KRSkyBox.cpp
+++ b/KREngine/KREngine/Classes/KRSkyBox.cpp
@@ -0,0 +1,70 @@
+//
+//  KRSkyBox.cpp
+//  KREngine
+//
+//  Created by Michael Ilich on 2012-08-23.
+//  Copyright (c) 2012 Kearwood Software. All rights reserved.
+//
+
+#include <iostream>
+
+#include "KRSkyBox.h"
+#import "KRShader.h"
+#import "KRContext.h"
+#import "KRMat4.h"
+#import "KRResource.h"
+
+KRSkyBox::KRSkyBox(KRContext &context, std::string name) : KRNode(context, name)
+{
+
+}
+
+KRSkyBox::~KRSkyBox()
+{
+    
+}
+
+std::string KRSkyBox::getElementName() {
+    return "sky_box";
+}
+
+#if TARGET_OS_IPHONE
+
+void KRSkyBox::render(KRCamera *pCamera, KRContext *pContext, KRBoundingVolume &frustrumVolume, KRMat4 &viewMatrix, KRVector3 &cameraPosition, KRNode::RenderPass renderPass) {
+    
+    if(renderPass == KRNode::RENDER_PASS_SKYBOX) {
+        // Skybox is rendered on the final pass of the deferred renderer
+        
+        KRMat4 projectionMatrix = pCamera->getProjectionMatrix();
+        
+        KRMat4 mvpmatrix = m_modelMatrix * viewMatrix * projectionMatrix;
+        KRMat4 matModelToView = viewMatrix * m_modelMatrix;
+        matModelToView.transpose();
+        matModelToView.invert();
+                
+        KRShader *pShader = pContext->getShaderManager()->getShader("sky_box", pCamera, false, false, false, 0, false, false, false, false, false, false, false, false, renderPass);
+        
+        pShader->bind(pCamera, matModelToView, mvpmatrix, cameraPosition, NULL, NULL, NULL, 0, renderPass);
+        
+        // Disable z-buffer write
+        glDepthMask(GL_FALSE);
+        
+        // Disable z-buffer test
+        glDisable(GL_DEPTH_TEST);
+        
+        // Render a full screen quad
+        static const GLfloat squareVertices[] = {
+            -1.0f, -1.0f,
+            1.0f, -1.0f,
+            -1.0f,  1.0f,
+            1.0f,  1.0f,
+        };
+        
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        glVertexAttribPointer(KRShader::KRENGINE_ATTRIB_VERTEX, 2, GL_FLOAT, 0, 0, squareVertices);
+        glEnableVertexAttribArray(KRShader::KRENGINE_ATTRIB_VERTEX);
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    }
+}
+
+#endif