latest view frustum work

interface/src/Orientation.cpp

@@ -1,5 +1,7 @@
 #include "Orientation.h"
 #include "Util.h"
+#include "glmUtils.h"
+
 
 Orientation::Orientation() {
 	right	= glm::vec3(  1.0,  0.0,  0.0 );

interface/src/Util.cpp

@@ -168,30 +168,6 @@ void drawvec3(int x, int y, float scale, float rotate, float thick, int mono, gl
     
 } 
 
-// XXXBHG - These handy operators should probably go somewhere else, I'm surprised they don't
-// already exist somewhere in OpenGL. Maybe someone can point me to them if they do exist!
-glm::vec3 operator* (float lhs, const glm::vec3& rhs)
-{
-    glm::vec3 result = rhs;
-    result.x *= lhs;
-    result.y *= lhs;
-    result.z *= lhs;
-    return result;
-}
-
-// XXXBHG - These handy operators should probably go somewhere else, I'm surprised they don't
-// already exist somewhere in OpenGL. Maybe someone can point me to them if they do exist!
-glm::vec3 operator* (const glm::vec3& lhs, float rhs)
-{
-    glm::vec3 result = lhs;
-    result.x *= rhs;
-    result.y *= rhs;
-    result.z *= rhs;
-    return result;
-}
-
-
-
 void drawGroundPlaneGrid( float size, int resolution )
 {
 

interface/src/Util.h

@@ -46,9 +46,6 @@ void drawvec3(int x, int y, float scale, float rotate, float thick, int mono, gl
 double diffclock(timeval *clock1,timeval *clock2);
 
 
-glm::vec3 operator* (float lhs, const glm::vec3& rhs);
-glm::vec3 operator* (const glm::vec3& lhs, float rhs);
-
 void drawGroundPlaneGrid( float size, int resolution );
 
 #endif

interface/src/main.cpp

@@ -75,6 +75,9 @@
 #include <PerfStat.h>
 #include <SharedUtil.h>
 #include <PacketHeaders.h>
+#include <glmUtils.h>
+
+#include "ViewFrustum.h"
 
 using namespace std;
 
@@ -159,6 +162,7 @@ bool viewFrustumFromOffset=false;   //  Wether or not to offset the view of the
 float viewFrustumOffsetYaw = -90.0;
 float viewFrustumOffsetPitch = 7.5;
 float viewFrustumOffsetRoll = 0.0;
+float viewFrustumOffsetDistance = 0.0;
 
 int noiseOn = 0;					//  Whether to add random noise 
 float noise = 1.0;                  //  Overall magnitude scaling for random noise levels 
@@ -562,10 +566,13 @@ void render_view_frustum() {
 		right = headRight;
 	}
     
-	float nearDist = 0.1; 
+    ViewFrustum vf(viewFrustumPosition,viewFrustumDirection);
-	float farDist  = 1.0;
+    vf.dump();
 	
-	float fovHalfAngle = 0.7854f*1.7; // 45 deg for half, so fov = 90 deg
+	float nearDist = 0.1; 
+	float farDist  = 10.0;
+	
+	float fovHalfAngle = 0.7854f*1.5; // 45 deg for half, so fov = 90 deg
 	
 	float screenWidth = ::WIDTH; // These values come from reshape() 
 	float screenHeight = ::HEIGHT;
@@ -588,6 +595,9 @@ void render_view_frustum() {
 	glm::vec3 nearBottomLeft  = nearCenter - (up*nearHeight*0.5) - (right*nearWidth*0.5); 
 	glm::vec3 nearBottomRight = nearCenter - (up*nearHeight*0.5) + (right*nearWidth*0.5); 
 
+    //printf("farCenter.x=%f, farCenter.y=%f, farCenter.z=%f\n",farCenter.x,farCenter.y,farCenter.z);
+    //printf("farTopLeft.x=%f, farTopLeft.y=%f, farTopLeft.z=%f\n",farTopLeft.x,farTopLeft.y,farTopLeft.z);
+	
 	// At this point we have all the corners for our frustum... we could use these to
 	// calculate various things...
 	
@@ -772,7 +782,7 @@ void display(void)
 			viewFrustumOffsetCamera.setPitch	(   0.0 + ::viewFrustumOffsetPitch );
 			viewFrustumOffsetCamera.setRoll     (   0.0 + ::viewFrustumOffsetRoll  ); 
 			viewFrustumOffsetCamera.setUp		(   0.2 + 0.2 );
-			viewFrustumOffsetCamera.setDistance(   0.5 + 0.2 );
+			viewFrustumOffsetCamera.setDistance (   0.5 + ::viewFrustumOffsetDistance );
 			viewFrustumOffsetCamera.update();
 			
 			whichCamera = viewFrustumOffsetCamera;
@@ -1138,6 +1148,9 @@ void key(unsigned char k, int x, int y)
 	if (k == '(') ::viewFrustumOffsetRoll  -= 0.5;
 	if (k == ')') ::viewFrustumOffsetRoll  += 0.5;
 
+	if (k == '<') ::viewFrustumOffsetDistance  -= 0.5;
+	if (k == '>') ::viewFrustumOffsetDistance  += 0.5;
+	
     if (k == '&') {
     	::paintOn = !::paintOn;		// toggle paint
     	::setupPaintingVoxel();		// also randomizes colors

shared/src/SharedUtil.cpp

@@ -351,3 +351,4 @@ void printVoxelCode(unsigned char* voxelCode) {
         } while( (time2 - time1) < waitTime);
     }
 #endif
+

shared/src/SharedUtil.h

@@ -54,4 +54,5 @@ bool createVoxelEditMessage(unsigned char command, short int sequence,
 void usleep(int waitTime);
 #endif
 
+
 #endif /* defined(__hifi__SharedUtil__) */

voxellib/src/ViewFrustum.cpp

@@ -0,0 +1,69 @@
+//
+//  ViewFrustum.cpp
+//  hifi
+//
+//  Created by Brad Hefta-Gaub on 04/11/13.
+//
+//  Simple view frustum class.
+//
+//
+
+#include "ViewFrustum.h"
+#include "glmUtils.h"
+
+ViewFrustum::ViewFrustum(glm::vec3 position, glm::vec3 direction) {
+	this->calculateViewFrustum(position, direction);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+// ViewFrustum::calculateViewFrustum()
+//
+// Description: this will calculate the view frustum bounds for a given position
+// 				and direction
+void ViewFrustum::calculateViewFrustum(glm::vec3 position, glm::vec3 direction) {
+	float nearDist = 0.1; 
+	float farDist  = 1.0;
+	
+	glm::vec3 front = direction;
+	glm::vec3 up    = glm::vec3(0,direction.y,0); // up is always this way
+	glm::vec3 right = glm::vec3(direction.z,direction.y,direction.x); // up is
+	
+	float fovHalfAngle = 0.7854f; // 45 deg for half, so fov = 90 deg
+	
+	float screenWidth = 800;//::WIDTH; // These values come from reshape()
+	float screenHeight = 600; //::HEIGHT;
+	float ratio      = screenWidth/screenHeight;
+	
+	float nearHeight = 2 * tan(fovHalfAngle) * nearDist;
+	float nearWidth  = nearHeight * ratio;
+	float farHeight  = 2 * tan(fovHalfAngle) * farDist;
+	float farWidth   = farHeight * ratio;
+	
+	this->_farCenter       = position+front*farDist;
+	this->_farTopLeft      = this->_farCenter  + (up*farHeight*0.5)  - (right*farWidth*0.5); 
+	this->_farTopRight     = this->_farCenter  + (up*farHeight*0.5)  + (right*farWidth*0.5); 
+	this->_farBottomLeft   = this->_farCenter  - (up*farHeight*0.5)  - (right*farWidth*0.5); 
+	this->_farBottomRight  = this->_farCenter  - (up*farHeight*0.5)  + (right*farWidth*0.5); 
+
+	this->_nearCenter      = position+front*nearDist;
+	this->_nearTopLeft     = this->_nearCenter + (up*nearHeight*0.5) - (right*nearWidth*0.5); 
+	this->_nearTopRight    = this->_nearCenter + (up*nearHeight*0.5) + (right*nearWidth*0.5); 
+	this->_nearBottomLeft  = this->_nearCenter - (up*nearHeight*0.5) - (right*nearWidth*0.5); 
+	this->_nearBottomRight = this->_nearCenter - (up*nearHeight*0.5) + (right*nearWidth*0.5); 
+}
+
+void ViewFrustum::dump() {
+    printf("farCenter.x=%f, farCenter.y=%f, farCenter.z=%f\n",this->_farCenter.x,this->_farCenter.y,this->_farCenter.z);
+    printf("farTopLeft.x=%f, farTopLeft.y=%f, farTopLeft.z=%f\n",this->_farTopLeft.x,this->_farTopLeft.y,this->_farTopLeft.z);
+    printf("farTopRight.x=%f, farTopRight.y=%f, farTopRight.z=%f\n",this->_farTopRight.x,this->_farTopRight.y,this->_farTopRight.z);
+    printf("farBottomLeft.x=%f, farBottomLeft.y=%f, farBottomLeft.z=%f\n",this->_farBottomLeft.x,this->_farBottomLeft.y,this->_farBottomLeft.z);
+    printf("farBottomRight.x=%f, farBottomRight.y=%f, farBottomRight.z=%f\n",this->_farBottomRight.x,this->_farBottomRight.y,this->_farBottomRight.z);
+
+    printf("nearCenter.x=%f, nearCenter.y=%f, nearCenter.z=%f\n",this->_nearCenter.x,this->_nearCenter.y,this->_nearCenter.z);
+    printf("nearTopLeft.x=%f, nearTopLeft.y=%f, nearTopLeft.z=%f\n",this->_nearTopLeft.x,this->_nearTopLeft.y,this->_nearTopLeft.z);
+    printf("nearTopRight.x=%f, nearTopRight.y=%f, nearTopRight.z=%f\n",this->_nearTopRight.x,this->_nearTopRight.y,this->_nearTopRight.z);
+    printf("nearBottomLeft.x=%f, nearBottomLeft.y=%f, nearBottomLeft.z=%f\n",this->_nearBottomLeft.x,this->_nearBottomLeft.y,this->_nearBottomLeft.z);
+    printf("nearBottomRight.x=%f, nearBottomRight.y=%f, nearBottomRight.z=%f\n",this->_nearBottomRight.x,this->_nearBottomRight.y,this->_nearBottomRight.z);
+}
+
+

voxellib/src/ViewFrustum.h

@@ -0,0 +1,50 @@
+//
+//  ViewFrustum.h
+//  hifi
+//
+//  Created by Brad Hefta-Gaub on 04/11/13.
+//
+//  Simple view frustum class.
+//
+//
+
+#ifndef __hifi__ViewFrustum__
+#define __hifi__ViewFrustum__
+
+#include <glm/glm.hpp>
+
+class ViewFrustum {
+private:
+	glm::vec3 _farCenter;
+	glm::vec3 _farTopLeft;      
+	glm::vec3 _farTopRight;     
+	glm::vec3 _farBottomLeft;   
+	glm::vec3 _farBottomRight;  
+
+	glm::vec3 _nearCenter; 
+	glm::vec3 _nearTopLeft;     
+	glm::vec3 _nearTopRight;    
+	glm::vec3 _nearBottomLeft;  
+	glm::vec3 _nearBottomRight; 
+public:
+	glm::vec3 getFarCenter()      const { return _farCenter; };
+	glm::vec3 getFarTopLeft()     const { return _farTopLeft; };  
+	glm::vec3 getFarTopRight()    const { return _farTopRight; };
+	glm::vec3 getFarBottomLeft()  const { return _farBottomLeft; };
+	glm::vec3 getFarBottomRight() const { return _farBottomRight; };
+
+	glm::vec3 getNearCenter()      const { return _nearCenter; };
+	glm::vec3 getNearTopLeft()     const { return _nearTopLeft; };  
+	glm::vec3 getNearTopRight()    const { return _nearTopRight; };
+	glm::vec3 getNearBottomLeft()  const { return _nearBottomLeft; };
+	glm::vec3 getNearBottomRight() const { return _nearBottomRight; };
+
+	void calculateViewFrustum(glm::vec3 position, glm::vec3 direction);
+
+	ViewFrustum(glm::vec3 position, glm::vec3 direction);
+	
+	void dump();
+};
+
+
+#endif /* defined(__hifi__ViewFrustum__) */

voxellib/src/glmUtils.cpp

@@ -0,0 +1,33 @@
+//
+//  glmUtils.cpp
+//  hifi
+//
+//  Created by Brad Hefta-Gaub on 4/12/13.
+//
+//
+
+#include <glm/glm.hpp>
+
+
+// XXXBHG - These handy operators should probably go somewhere else, I'm surprised they don't
+// already exist somewhere in OpenGL. Maybe someone can point me to them if they do exist!
+glm::vec3 operator* (float lhs, const glm::vec3& rhs)
+{
+    glm::vec3 result = rhs;
+    result.x *= lhs;
+    result.y *= lhs;
+    result.z *= lhs;
+    return result;
+}
+
+// XXXBHG - These handy operators should probably go somewhere else, I'm surprised they don't
+// already exist somewhere in OpenGL. Maybe someone can point me to them if they do exist!
+glm::vec3 operator* (const glm::vec3& lhs, float rhs)
+{
+    glm::vec3 result = lhs;
+    result.x *= rhs;
+    result.y *= rhs;
+    result.z *= rhs;
+    return result;
+}
+

voxellib/src/glmUtils.h

@@ -0,0 +1,18 @@
+//
+//  glmUtils.h
+//  hifi
+//
+//  Created by Brad Hefta-Gaub on 4/12/13.
+//
+//
+
+#ifndef __hifi__glmUtils__
+#define __hifi__glmUtils__
+
+#include <glm/glm.hpp>
+
+glm::vec3 operator* (float lhs, const glm::vec3& rhs);
+glm::vec3 operator* (const glm::vec3& lhs, float rhs);
+
+
+#endif // __hifi__glmUtils__