** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
+**
** http://oss.sgi.com/projects/FreeB
-**
+**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
+**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
-**
+**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
-** $Date: 2001/03/17 00:25:40 $ $Revision: 1.1 $
*/
/*
-** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/bezierEval.cc,v 1.1 2001/03/17 00:25:40 brianp Exp $
*/
#include <stdlib.h>
#include <math.h>
#include "bezierEval.h"
+#ifdef __WATCOMC__
+#pragma warning 14 10
+#endif
+
#define TOLERANCE 0.0001
#ifndef MAX_ORDER
static void normalize(float vec[3]);
static void crossProduct(float x[3], float y[3], float ret[3]);
+#if 0 // UNUSED
static void bezierCurveEvalfast(float u0, float u1, int order, float *ctlpoints, int stride, int dimension, float u, float retpoint[]);
+#endif
static float binomialCoefficients[8][8] = {
{1,0,0,0,0,0,0,0},
{
float uprime = (u-u0)/(u1-u0);
float *ctlptr = ctlpoints;
- float oneMinusX = 1.0-uprime;
- float XPower = 1.0;
+ float oneMinusX = 1.0f-uprime;
+ float XPower = 1.0f;
int i,k;
for(k=0; k<dimension; k++)
}
}
-
+#if 0 // UNUSED
/*order = degree +1 >=1.
*/
void bezierCurveEvalfast(float u0, float u1, int order, float *ctlpoints, int stride, int dimension, float u, float retpoint[])
buf[r][i][j] = (1-uprime)*buf[r-1][i][j] + uprime*buf[r-1][i+1][j];
}
}
-
+
for(j=0; j<dimension; j++)
retpoint[j] = buf[order-1][0][j];
}
-
+#endif
/*order = degree +1 >=1.
}
ctlptr += stride;
}
-
+
bezierCurveEval(u0, u1, order-1, (float*) buf, MAX_DIMENSION, dimension, u, retDer);
}
-
+
void bezierCurveEvalDerGen(int der, float u0, float u1, int order, float *ctlpoints, int stride, int dimension, float u, float retDer[])
{
int i,k,r;
*/
void bezierSurfEvalDerGen(int uder, int vder, float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[])
{
- int i,j,k;
+ int i;
float newPoints[MAX_ORDER][MAX_DIMENSION];
for(i=0; i<uorder; i++){
bezierCurveEvalDerGen(vder, v0, v1, vorder, ctlpoints+ustride*i, vstride, dimension, v, newPoints[i]);
}
-
+
bezierCurveEvalDerGen(uder, u0, u1, uorder, (float *) newPoints, MAX_DIMENSION, dimension, u, ret);
}
-/*division by w is performed*/
+/*division by w is performed*/
void bezierSurfEval(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[])
{
bezierSurfEvalDerGen(0, 0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, ret);
ret[0] /= ret[3];
ret[1] /= ret[3];
ret[2] /= ret[3];
- }
+ }
}
void bezierSurfEvalNormal(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float retNormal[])
assert(dimension>=3 && dimension <=4);
bezierSurfEvalDerGen(1,0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, partialU);
bezierSurfEvalDerGen(0,1, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, partialV);
-
+
if(dimension == 3){/*inhomogeneous*/
crossProduct(partialU, partialV, retNormal);
float newPartialU[MAX_DIMENSION];
float newPartialV[MAX_DIMENSION];
int i;
- bezierSurfEvalDerGen(0,0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, val);
+ bezierSurfEvalDerGen(0,0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, val);
for(i=0; i<=2; i++){
newPartialU[i] = partialU[i] * val[3] - val[i] * partialU[3];
- newPartialV[i] = partialV[i] * val[3] - val[i] * partialV[3];
+ newPartialV[i] = partialV[i] * val[3] - val[i] * partialV[3];
}
crossProduct(newPartialU, newPartialV, retNormal);
normalize(retNormal);
/*if size is 0, then nothing is done*/
static void normalize(float vec[3])
{
- float size = sqrt(vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2]);
+ float size = (float)sqrt(vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2]);
- if(size < TOLERANCE)
+ if(size < TOLERANCE)
{
#ifdef DEBUG
fprintf(stderr, "Warning: in oglBSpline.c normal is 0\n");
vec[2] = vec[2]/size;
}
}
-
+
static void crossProduct(float x[3], float y[3], float ret[3])
{
projects / mesa.git / blobdiff