src/projectM-iTunes-VizKit/source/VisualNurbs.cpp - vendor/opensource/projectM - Git at Google

 /*
  * Project: VizKit
  * Version: 2.3

  * Date: 20090823
  * File: VisualNurbs.cpp
  *
  */

 /***************************************************************************

 Copyright (c) 2004-2009 Heiko Wichmann (http://www.imagomat.de/vizkit)


 This software is provided 'as-is', without any expressed or implied warranty.
 In no event will the authors be held liable for any damages
 arising from the use of this software.

 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely, subject to the following restrictions:

 1. The origin of this software must not be misrepresented;
    you must not claim that you wrote the original software.
    If you use this software in a product, an acknowledgment
    in the product documentation would be appreciated
    but is not required.

 2. Altered source versions must be plainly marked as such,
    and must not be misrepresented as being the original software.

 3. This notice may not be removed or altered from any source distribution.

  ***************************************************************************/

 #include "VisualNurbs.h"
 #include "VisualErrorHandling.h"
 #include "VisualGraphicsCore.h"
 #include "VisualGraphics.h"


 using namespace VizKit;


 #ifdef __cplusplus
 extern "C" {
 #endif
 	GLvoid nurbsError(GLenum errorCode);
 #ifdef __cplusplus
 }
 #endif

 GLvoid nurbsError(GLenum errorCode) {
 	const GLubyte* estring;
 	estring = gluErrorString(errorCode);
 	writeLog((char*)estring);
 }


 VisualNurbs::VisualNurbs(uint8 sKnotsCount, float* sKnotsPointer, uint8 tKnotsCount, float* tKnotsPointer, uint16 s_Stride, uint16 t_Stride, uint16 s_Order, uint16 t_Order) {

 	sNumKnots = sKnotsCount;
 	sKnots = (GLfloat*)malloc(sKnotsCount * sizeof(GLfloat));
 	for (int i = 0; i < sKnotsCount; i++) {
 		sKnots[i] = sKnotsPointer[i];
 	}
 	tNumKnots = tKnotsCount;
 	tKnots = (GLfloat*)malloc(tKnotsCount * sizeof(GLfloat));
 	for (int i = 0; i < tKnotsCount; i++) {
 		tKnots[i] = tKnotsPointer[i];
 	}

 	sStride = s_Stride;
 	tStride = t_Stride;
 	sOrder = s_Order;
 	tOrder = t_Order;

 	nurbsObject = gluNewNurbsRenderer();

 	controlPointsVisibility = kInvisible;
 	controlPoints = NULL;
 	nurbsTexture = NULL;

 }


 VisualNurbs::~VisualNurbs() {
 	if (nurbsTexture != NULL) {
 		delete nurbsTexture;
 	}
 	if (sKnots != NULL) {
 		free(sKnots);
 	}
 	if (tKnots != NULL) {
 		free(tKnots);
 	}
 	if (controlPoints != NULL) {
 		free(controlPoints);
 	}
 	gluDeleteNurbsRenderer(nurbsObject);
 }


 VisualNurbs::VisualNurbs(const VisualNurbs& other) {
 	copy(other);
 }


 VisualNurbs& VisualNurbs::operator=(const VisualNurbs& other) {

 	if (this == &other) return *this;

 	if (this->sKnots != NULL) {
 		free(this->sKnots);
 	}
 	if (this->tKnots != NULL) {
 		free(this->tKnots);
 	}
 	if (this->nurbsObject) {
 		gluDeleteNurbsRenderer(this->nurbsObject);
 	}
 	if (this->controlPoints != NULL) {
 		free(this->controlPoints);
 	}

 	this->copy(other);

 	return *this;
 }


 void VisualNurbs::copy(const VisualNurbs& other) {
 	this->sNumKnots = other.sNumKnots;
 	if (other.sKnots != NULL) {
 		this->sKnots = (GLfloat*)malloc(this->sNumKnots * sizeof(GLfloat));
 		for (int i = 0; i < this->sNumKnots; i++) {
 			this->sKnots[i] = other.sKnots[i];
 		}
 	} else {
 		this->sKnots = NULL;
 	}
 	this->tNumKnots = other.tNumKnots;
 	if (other.tKnots != NULL) {
 		this->tKnots = (GLfloat*)malloc(this->tNumKnots * sizeof(GLfloat));
 		for (int i = 0; i < this->tNumKnots; i++) {
 			this->tKnots[i] = other.tKnots[i];
 		}
 	} else {
 		this->tKnots = NULL;
 	}

 	this->sStride = other.sStride;
 	this->tStride = other.tStride;
 	this->sOrder = other.sOrder;
 	this->tOrder = other.tOrder;

 	this->nurbsObject = gluNewNurbsRenderer();

 	this->controlPointsVisibility = other.controlPointsVisibility;
 	uint16 numberOfControlPoints = (this->sNumKnots - this->sOrder) * (this->tNumKnots - this->tOrder);
 	this->controlPoints = (GLfloat*)malloc(numberOfControlPoints * sizeof(GLfloat));
 	for (int i = 0; i < numberOfControlPoints; i++) {
 		this->controlPoints[i] = other.controlPoints[i];
 	}
 	if (other.nurbsTexture) {
 		this->nurbsTexture = new NurbsTexture(*(other.nurbsTexture));
 	} else {
 		this->nurbsTexture = NULL;
 	}
 }


 VisualNurbs::NurbsTexture::NurbsTexture() {
 	sNumKnots = 0;
 	sKnots = NULL;
 	tNumKnots = 0;
 	tKnots = NULL;
 	sStride = 0;
 	tStride = 0;
 	sOrder = 0;
 	tOrder = 0;
 	textureName = 0;
 	canUseRectExtension = false;
 	texturePoints = NULL;
 }


 VisualNurbs::NurbsTexture::~NurbsTexture() {
 	free(sKnots);
 	free(tKnots);
 	if (texturePoints) {
 		free(texturePoints);
 	}
 }


 VisualNurbs::NurbsTexture::NurbsTexture(const NurbsTexture& other) {
 	copy(other);
 }


 VisualNurbs::NurbsTexture& VisualNurbs::NurbsTexture::operator=(const VisualNurbs::NurbsTexture& other) {

 	if (this == &other) return *this;

 	if (this->sKnots != NULL) {
 		free(this->sKnots);
 	}
 	if (this->tKnots != NULL) {
 		free(this->tKnots);
 	}
 	if (this->texturePoints != NULL) {
 		free(this->texturePoints);
 	}

 	this->copy(other);

 	return *this;
 }


 void VisualNurbs::NurbsTexture::copy(const VisualNurbs::NurbsTexture& other) {
 	this->sNumKnots = other.sNumKnots;
 	if (other.sKnots != NULL) {
 		this->sKnots = (GLfloat*)malloc(this->sNumKnots * sizeof(GLfloat));
 		for (int i = 0; i < this->sNumKnots; i++) {
 			this->sKnots[i] = other.sKnots[i];
 		}
 	} else {
 		this->sKnots = NULL;
 	}
 	this->tNumKnots = other.tNumKnots;
 	if (other.tKnots != NULL) {
 		this->tKnots = (GLfloat*)malloc(this->tNumKnots * sizeof(GLfloat));
 		for (int i = 0; i < this->tNumKnots; i++) {
 			this->tKnots[i] = other.tKnots[i];
 		}
 	} else {
 		this->tKnots = NULL;
 	}
 	this->sStride = other.sStride;
 	this->tStride = other.tStride;
 	this->sOrder = other.sOrder;
 	this->tOrder = other.tOrder;
 	this->textureName = other.textureName;
 	this->canUseRectExtension = other.canUseRectExtension;
 	uint16 numberOfTextureControlPoints = (this->sNumKnots - this->sOrder) * (this->tNumKnots - this->tOrder);
 	this->texturePoints = (GLfloat*)malloc(numberOfTextureControlPoints * sizeof(GLfloat));
 	for (int i = 0; i < numberOfTextureControlPoints; i++) {
 		this->texturePoints[i] = other.texturePoints[i];
 	}
 }


 void VisualNurbs::setNurbsProperty(uint32 property, float value) {

 /*
 	//gluNurbsCallback(this->coverNurb, GLU_ERROR, nurbsError);
 */

 	gluNurbsProperty(this->nurbsObject, (GLenum)property, (GLfloat)value);
 }


 void VisualNurbs::setSamplingTolerance(double samplingTolerance) {
 	this->setNurbsProperty(GLU_SAMPLING_TOLERANCE, static_cast<float>(samplingTolerance));
 }


 void VisualNurbs::setDisplayMode(NurbsDisplayMode requestedDisplayMode) {
 	if (requestedDisplayMode == kFill) {
 		this->setNurbsProperty(GLU_DISPLAY_MODE, GLU_FILL);
 	} else if (requestedDisplayMode == kOutlinePolygon) {
 		this->setNurbsProperty(GLU_DISPLAY_MODE, GLU_OUTLINE_POLYGON);
 	}
 }


 void VisualNurbs::setControlPointsVisibility(Visibility visibility) {
 	this->controlPointsVisibility = visibility;
 }


 void VisualNurbs::setControlPoints(uint16 numberOfControlPoints, double* someControlPoints) {
 	if (this->controlPoints != NULL) {
 		free(this->controlPoints);
 		this->controlPoints = NULL;
 	}
 	this->controlPoints = (GLfloat*)malloc(numberOfControlPoints * sizeof(GLfloat));
 	for (int i = 0; i < numberOfControlPoints; i++) {
 		this->controlPoints[i] = (GLfloat)(someControlPoints[i]);
 	}
 }


 void VisualNurbs::setTexture(uint8 sKnotsCount, float* sKnotsPointer, uint8 tKnotsCount, float* tKnotsPointer, uint16 s_Stride, uint16 t_Stride, uint16 s_Order, uint16 t_Order, uint32 aTextureName, bool canUseRectExtensionBool) {

 	if (this->nurbsTexture != NULL) {
 		delete this->nurbsTexture;
 		this->nurbsTexture = NULL;
 	}
 	this->nurbsTexture = new NurbsTexture;
 	this->nurbsTexture->sNumKnots = sKnotsCount;
 	this->nurbsTexture->sKnots = (GLfloat*)malloc(sKnotsCount * sizeof(GLfloat));
 	for (int i = 0; i < sKnotsCount; i++) {
 		this->nurbsTexture->sKnots[i] = sKnotsPointer[i];
 	}
 	this->nurbsTexture->tNumKnots = tKnotsCount;
 	this->nurbsTexture->tKnots = (GLfloat*)malloc(tKnotsCount * sizeof(GLfloat));
 	for (int i = 0; i < tKnotsCount; i++) {
 		this->nurbsTexture->tKnots[i] = tKnotsPointer[i];
 	}

 	this->nurbsTexture->sStride = s_Stride;
 	this->nurbsTexture->tStride = t_Stride;
 	this->nurbsTexture->sOrder = s_Order;
 	this->nurbsTexture->tOrder = t_Order;

 	this->nurbsTexture->textureName = aTextureName;
 	this->nurbsTexture->canUseRectExtension = canUseRectExtensionBool;

 }


 void VisualNurbs::setTextureControlPoints(uint16 numberOfTextureControlPoints, float* someTextureControlPoints) {

 	if (this->nurbsTexture != NULL) {
 		if (this->nurbsTexture->texturePoints != NULL) {
 			free(this->nurbsTexture->texturePoints);
 			this->nurbsTexture->texturePoints = NULL;
 		}
 		this->nurbsTexture->texturePoints = (GLfloat*)malloc(numberOfTextureControlPoints * sizeof(GLfloat));
 		for (int i = 0; i < numberOfTextureControlPoints; i++) {
 			this->nurbsTexture->texturePoints[i] = someTextureControlPoints[i];
 		}
 	} else {
 		char errLog[256];
 		sprintf(errLog, "no NurbsTexture available in file: %s (line: %d) [%s])", __FILE__, __LINE__, __FUNCTION__);
 		writeLog(errLog);
 	}
 }


 void VisualNurbs::draw() {

 	if (this->nurbsTexture != NULL) {
 		if (this->nurbsTexture->canUseRectExtension == false) {
 			glEnable(GL_TEXTURE_2D);
 			glBindTexture(GL_TEXTURE_2D, (GLuint)this->nurbsTexture->textureName);
 		} else {
 #if TARGET_OS_MAC
 			glEnable(GL_TEXTURE_RECTANGLE_EXT);
 			glBindTexture(GL_TEXTURE_RECTANGLE_EXT, (GLuint)this->nurbsTexture->textureName);
 #endif
 		}
 	}

 	gluBeginSurface(this->nurbsObject);
 		if (this->nurbsTexture != NULL) {
 			gluNurbsSurface(this->nurbsObject,
 								this->nurbsTexture->sNumKnots,
 								this->nurbsTexture->sKnots,
 								this->nurbsTexture->tNumKnots,
 								this->nurbsTexture->tKnots,
 								this->nurbsTexture->sStride,
 								this->nurbsTexture->tStride,
 								this->nurbsTexture->texturePoints,
 								this->nurbsTexture->sOrder,
 								this->nurbsTexture->tOrder,
 								GL_MAP2_TEXTURE_COORD_2);
 		}
 		gluNurbsSurface(this->nurbsObject,
 							this->sNumKnots,
 							this->sKnots,
 							this->tNumKnots,
 							this->tKnots,
 							this->sStride,
 							this->tStride,
 							this->controlPoints,
 							this->sOrder,
 							this->tOrder,
 							GL_MAP2_VERTEX_3);
 	gluEndSurface(this->nurbsObject);

 	if (this->nurbsTexture != NULL) {
 		if (this->nurbsTexture->canUseRectExtension == false) {
 			glDisable(GL_TEXTURE_2D);
 		} else {
 #if TARGET_OS_MAC
 			glDisable(GL_TEXTURE_RECTANGLE_EXT);
 #endif
 		}
 	}

 	if (this->controlPointsVisibility == kVisible) {
 		int cnt = 0;
 		glPointSize(3.0f);
 		glColor3d(1.0, 1.0, 0.0);
 		glBegin(GL_POINTS);
 		int i, j;
 		for (i = 0; i < 8; i++) {
 			for (j = 0; j < 8; j++) {
 				glVertex3f(this->controlPoints[cnt], this->controlPoints[cnt + 1], this->controlPoints[cnt + 2]);
 				cnt += 3;
 			}
 		}
 		glEnd();
 	}

 }
	/*
	* Project: VizKit
	* Version: 2.3

	* Date: 20090823
	* File: VisualNurbs.cpp
	*
	*/

	/***************************************************************************

	Copyright (c) 2004-2009 Heiko Wichmann (http://www.imagomat.de/vizkit)


	This software is provided 'as-is', without any expressed or implied warranty.
	In no event will the authors be held liable for any damages
	arising from the use of this software.

	Permission is granted to anyone to use this software for any purpose,
	including commercial applications, and to alter it and redistribute it
	freely, subject to the following restrictions:

	1. The origin of this software must not be misrepresented;
	you must not claim that you wrote the original software.
	If you use this software in a product, an acknowledgment
	in the product documentation would be appreciated
	but is not required.

	2. Altered source versions must be plainly marked as such,
	and must not be misrepresented as being the original software.

	3. This notice may not be removed or altered from any source distribution.

	***************************************************************************/

	#include "VisualNurbs.h"
	#include "VisualErrorHandling.h"
	#include "VisualGraphicsCore.h"
	#include "VisualGraphics.h"



	using namespace VizKit;


	#ifdef __cplusplus
	extern "C" {
	#endif
	GLvoid nurbsError(GLenum errorCode);
	#ifdef __cplusplus
	}
	#endif

	GLvoid nurbsError(GLenum errorCode) {
	const GLubyte* estring;
	estring = gluErrorString(errorCode);
	writeLog((char*)estring);
	}


	VisualNurbs::VisualNurbs(uint8 sKnotsCount, float* sKnotsPointer, uint8 tKnotsCount, float* tKnotsPointer, uint16 s_Stride, uint16 t_Stride, uint16 s_Order, uint16 t_Order) {

	sNumKnots = sKnotsCount;
	sKnots = (GLfloat)malloc(sKnotsCount sizeof(GLfloat));
	for (int i = 0; i < sKnotsCount; i++) {
	sKnots[i] = sKnotsPointer[i];
	}
	tNumKnots = tKnotsCount;
	tKnots = (GLfloat)malloc(tKnotsCount sizeof(GLfloat));
	for (int i = 0; i < tKnotsCount; i++) {
	tKnots[i] = tKnotsPointer[i];
	}

	sStride = s_Stride;
	tStride = t_Stride;
	sOrder = s_Order;
	tOrder = t_Order;

	nurbsObject = gluNewNurbsRenderer();

	controlPointsVisibility = kInvisible;
	controlPoints = NULL;
	nurbsTexture = NULL;

	}


	VisualNurbs::~VisualNurbs() {
	if (nurbsTexture != NULL) {
	delete nurbsTexture;
	}
	if (sKnots != NULL) {
	free(sKnots);
	}
	if (tKnots != NULL) {
	free(tKnots);
	}
	if (controlPoints != NULL) {
	free(controlPoints);
	}
	gluDeleteNurbsRenderer(nurbsObject);
	}


	VisualNurbs::VisualNurbs(const VisualNurbs& other) {
	copy(other);
	}


	VisualNurbs& VisualNurbs::operator=(const VisualNurbs& other) {

	if (this == &other) return *this;

	if (this->sKnots != NULL) {
	free(this->sKnots);
	}
	if (this->tKnots != NULL) {
	free(this->tKnots);
	}
	if (this->nurbsObject) {
	gluDeleteNurbsRenderer(this->nurbsObject);
	}
	if (this->controlPoints != NULL) {
	free(this->controlPoints);
	}

	this->copy(other);

	return *this;
	}


	void VisualNurbs::copy(const VisualNurbs& other) {
	this->sNumKnots = other.sNumKnots;
	if (other.sKnots != NULL) {
	this->sKnots = (GLfloat)malloc(this->sNumKnots sizeof(GLfloat));
	for (int i = 0; i < this->sNumKnots; i++) {
	this->sKnots[i] = other.sKnots[i];
	}
	} else {
	this->sKnots = NULL;
	}
	this->tNumKnots = other.tNumKnots;
	if (other.tKnots != NULL) {
	this->tKnots = (GLfloat)malloc(this->tNumKnots sizeof(GLfloat));
	for (int i = 0; i < this->tNumKnots; i++) {
	this->tKnots[i] = other.tKnots[i];
	}
	} else {
	this->tKnots = NULL;
	}

	this->sStride = other.sStride;
	this->tStride = other.tStride;
	this->sOrder = other.sOrder;
	this->tOrder = other.tOrder;

	this->nurbsObject = gluNewNurbsRenderer();

	this->controlPointsVisibility = other.controlPointsVisibility;
	uint16 numberOfControlPoints = (this->sNumKnots - this->sOrder) * (this->tNumKnots - this->tOrder);
	this->controlPoints = (GLfloat)malloc(numberOfControlPoints sizeof(GLfloat));
	for (int i = 0; i < numberOfControlPoints; i++) {
	this->controlPoints[i] = other.controlPoints[i];
	}
	if (other.nurbsTexture) {
	this->nurbsTexture = new NurbsTexture(*(other.nurbsTexture));
	} else {
	this->nurbsTexture = NULL;
	}
	}


	VisualNurbs::NurbsTexture::NurbsTexture() {
	sNumKnots = 0;
	sKnots = NULL;
	tNumKnots = 0;
	tKnots = NULL;
	sStride = 0;
	tStride = 0;
	sOrder = 0;
	tOrder = 0;
	textureName = 0;
	canUseRectExtension = false;
	texturePoints = NULL;
	}


	VisualNurbs::NurbsTexture::~NurbsTexture() {
	free(sKnots);
	free(tKnots);
	if (texturePoints) {
	free(texturePoints);
	}
	}


	VisualNurbs::NurbsTexture::NurbsTexture(const NurbsTexture& other) {
	copy(other);
	}


	VisualNurbs::NurbsTexture& VisualNurbs::NurbsTexture::operator=(const VisualNurbs::NurbsTexture& other) {

	if (this == &other) return *this;

	if (this->sKnots != NULL) {
	free(this->sKnots);
	}
	if (this->tKnots != NULL) {
	free(this->tKnots);
	}
	if (this->texturePoints != NULL) {
	free(this->texturePoints);
	}

	this->copy(other);

	return *this;
	}


	void VisualNurbs::NurbsTexture::copy(const VisualNurbs::NurbsTexture& other) {
	this->sNumKnots = other.sNumKnots;
	if (other.sKnots != NULL) {
	this->sKnots = (GLfloat)malloc(this->sNumKnots sizeof(GLfloat));
	for (int i = 0; i < this->sNumKnots; i++) {
	this->sKnots[i] = other.sKnots[i];
	}
	} else {
	this->sKnots = NULL;
	}
	this->tNumKnots = other.tNumKnots;
	if (other.tKnots != NULL) {
	this->tKnots = (GLfloat)malloc(this->tNumKnots sizeof(GLfloat));
	for (int i = 0; i < this->tNumKnots; i++) {
	this->tKnots[i] = other.tKnots[i];
	}
	} else {
	this->tKnots = NULL;
	}
	this->sStride = other.sStride;
	this->tStride = other.tStride;
	this->sOrder = other.sOrder;
	this->tOrder = other.tOrder;
	this->textureName = other.textureName;
	this->canUseRectExtension = other.canUseRectExtension;
	uint16 numberOfTextureControlPoints = (this->sNumKnots - this->sOrder) * (this->tNumKnots - this->tOrder);
	this->texturePoints = (GLfloat)malloc(numberOfTextureControlPoints sizeof(GLfloat));
	for (int i = 0; i < numberOfTextureControlPoints; i++) {
	this->texturePoints[i] = other.texturePoints[i];
	}
	}


	void VisualNurbs::setNurbsProperty(uint32 property, float value) {

	/*
	//gluNurbsCallback(this->coverNurb, GLU_ERROR, nurbsError);
	*/

	gluNurbsProperty(this->nurbsObject, (GLenum)property, (GLfloat)value);
	}


	void VisualNurbs::setSamplingTolerance(double samplingTolerance) {
	this->setNurbsProperty(GLU_SAMPLING_TOLERANCE, static_cast<float>(samplingTolerance));
	}


	void VisualNurbs::setDisplayMode(NurbsDisplayMode requestedDisplayMode) {
	if (requestedDisplayMode == kFill) {
	this->setNurbsProperty(GLU_DISPLAY_MODE, GLU_FILL);
	} else if (requestedDisplayMode == kOutlinePolygon) {
	this->setNurbsProperty(GLU_DISPLAY_MODE, GLU_OUTLINE_POLYGON);
	}
	}


	void VisualNurbs::setControlPointsVisibility(Visibility visibility) {
	this->controlPointsVisibility = visibility;
	}


	void VisualNurbs::setControlPoints(uint16 numberOfControlPoints, double* someControlPoints) {
	if (this->controlPoints != NULL) {
	free(this->controlPoints);
	this->controlPoints = NULL;
	}
	this->controlPoints = (GLfloat)malloc(numberOfControlPoints sizeof(GLfloat));
	for (int i = 0; i < numberOfControlPoints; i++) {
	this->controlPoints[i] = (GLfloat)(someControlPoints[i]);
	}
	}


	void VisualNurbs::setTexture(uint8 sKnotsCount, float* sKnotsPointer, uint8 tKnotsCount, float* tKnotsPointer, uint16 s_Stride, uint16 t_Stride, uint16 s_Order, uint16 t_Order, uint32 aTextureName, bool canUseRectExtensionBool) {

	if (this->nurbsTexture != NULL) {
	delete this->nurbsTexture;
	this->nurbsTexture = NULL;
	}
	this->nurbsTexture = new NurbsTexture;
	this->nurbsTexture->sNumKnots = sKnotsCount;
	this->nurbsTexture->sKnots = (GLfloat)malloc(sKnotsCount sizeof(GLfloat));
	for (int i = 0; i < sKnotsCount; i++) {
	this->nurbsTexture->sKnots[i] = sKnotsPointer[i];
	}
	this->nurbsTexture->tNumKnots = tKnotsCount;
	this->nurbsTexture->tKnots = (GLfloat)malloc(tKnotsCount sizeof(GLfloat));
	for (int i = 0; i < tKnotsCount; i++) {
	this->nurbsTexture->tKnots[i] = tKnotsPointer[i];
	}

	this->nurbsTexture->sStride = s_Stride;
	this->nurbsTexture->tStride = t_Stride;
	this->nurbsTexture->sOrder = s_Order;
	this->nurbsTexture->tOrder = t_Order;

	this->nurbsTexture->textureName = aTextureName;
	this->nurbsTexture->canUseRectExtension = canUseRectExtensionBool;

	}


	void VisualNurbs::setTextureControlPoints(uint16 numberOfTextureControlPoints, float* someTextureControlPoints) {

	if (this->nurbsTexture != NULL) {
	if (this->nurbsTexture->texturePoints != NULL) {
	free(this->nurbsTexture->texturePoints);
	this->nurbsTexture->texturePoints = NULL;
	}
	this->nurbsTexture->texturePoints = (GLfloat)malloc(numberOfTextureControlPoints sizeof(GLfloat));
	for (int i = 0; i < numberOfTextureControlPoints; i++) {
	this->nurbsTexture->texturePoints[i] = someTextureControlPoints[i];
	}
	} else {
	char errLog[256];
	sprintf(errLog, "no NurbsTexture available in file: %s (line: %d) [%s])", __FILE__, __LINE__, __FUNCTION__);
	writeLog(errLog);
	}
	}


	void VisualNurbs::draw() {

	if (this->nurbsTexture != NULL) {
	if (this->nurbsTexture->canUseRectExtension == false) {
	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, (GLuint)this->nurbsTexture->textureName);
	} else {
	#if TARGET_OS_MAC
	glEnable(GL_TEXTURE_RECTANGLE_EXT);
	glBindTexture(GL_TEXTURE_RECTANGLE_EXT, (GLuint)this->nurbsTexture->textureName);
	#endif
	}
	}

	gluBeginSurface(this->nurbsObject);
	if (this->nurbsTexture != NULL) {
	gluNurbsSurface(this->nurbsObject,
	this->nurbsTexture->sNumKnots,
	this->nurbsTexture->sKnots,
	this->nurbsTexture->tNumKnots,
	this->nurbsTexture->tKnots,
	this->nurbsTexture->sStride,
	this->nurbsTexture->tStride,
	this->nurbsTexture->texturePoints,
	this->nurbsTexture->sOrder,
	this->nurbsTexture->tOrder,
	GL_MAP2_TEXTURE_COORD_2);
	}
	gluNurbsSurface(this->nurbsObject,
	this->sNumKnots,
	this->sKnots,
	this->tNumKnots,
	this->tKnots,
	this->sStride,
	this->tStride,
	this->controlPoints,
	this->sOrder,
	this->tOrder,
	GL_MAP2_VERTEX_3);
	gluEndSurface(this->nurbsObject);

	if (this->nurbsTexture != NULL) {
	if (this->nurbsTexture->canUseRectExtension == false) {
	glDisable(GL_TEXTURE_2D);
	} else {
	#if TARGET_OS_MAC
	glDisable(GL_TEXTURE_RECTANGLE_EXT);
	#endif
	}
	}

	if (this->controlPointsVisibility == kVisible) {
	int cnt = 0;
	glPointSize(3.0f);
	glColor3d(1.0, 1.0, 0.0);
	glBegin(GL_POINTS);
	int i, j;
	for (i = 0; i < 8; i++) {
	for (j = 0; j < 8; j++) {
	glVertex3f(this->controlPoints[cnt], this->controlPoints[cnt + 1], this->controlPoints[cnt + 2]);
	cnt += 3;
	}
	}
	glEnd();
	}

	}