home *** CD-ROM | disk | FTP | other *** search
- // copyright 1993 Michael B. Johnson; some portions copyright 1994, MIT
- // see COPYRIGHT for reuse legalities
- //
-
- #import "RIBSphere.h"
- #import <stdio.h>
-
-
- @implementation RIBSphere
-
- + initialize { return [RIBSphere setVersion:1], self; }
-
- - (BOOL)hasBoundingBox { return YES; }
-
- - init
- {
- [super init];
-
- radius = 1.0;
- zMin = -1.0;
- zMax = 1.0;
-
- return self;
- }
-
- - setRadius:(RtFloat)newRadius
- zMin:(RtFloat)newZMin zMax:(RtFloat)newZMax
- thetaMax:(RtFloat)newThetaMax
- n:(int)newN tokens:(RtToken *)newTokens parms:(RtPointer *)newParms archiveVector:(char **)newArchiveVector
- printfTypeVector:(int *)newPrintfTypeVector printfNVector:(int *)newPrintfNVector
- {
- radius = newRadius;
- zMin = newZMin;
- zMax = newZMax;
- if (zMin < (-1 * radius))
- { zMin = -1 * radius;
- }
- if (zMax > radius)
- { zMax = radius;
- }
-
- thetaMax = newThetaMax;
- [self setN:newN tokens:newTokens parms:newParms archiveVector:newArchiveVector printfTypeVector:newPrintfTypeVector printfNVector:newPrintfNVector];
-
- dirtyBoundingBox = TRUE;
-
- return self;
- }
-
- - setRadius:(RtFloat)newRadius { radius = newRadius; dirtyBoundingBox = TRUE; return self; }
- - setZMin:(RtFloat)newZMin { zMin = newZMin; dirtyBoundingBox = TRUE; return self; }
- - setZMax:(RtFloat)newZMax { zMax = newZMax; dirtyBoundingBox = TRUE; return self; }
-
- - (RtFloat)radius { return radius; }
- - (RtFloat)zMin { return zMin; }
- - (RtFloat)zMax { return zMax; }
-
- - calculateBoundingBoxStartingAt:(RtFloat)shutterOpenTime endingAt:(RtFloat)shutterCloseTime
- {
- if (thetaMax >= 180.0)
- { boundingBox[0] = -1.0 * radius;
- }
- else // less than 180
- { if (thetaMax >= 90.0)
- { boundingBox[0] = -1.0 * radius * (RtFloat)sin((double)(toRadians((thetaMax - 90.0))));
- }
- else
- { //boundingBox[0] = radius * (RtFloat)sin((double)(toRadians(thetaMax)));
- boundingBox[0] = 0.0; // this is not true if zMax or abs(zMin) is less than radius
- }
- }
- boundingBox[1] = radius;
-
- if (thetaMax >= 270.0)
- { boundingBox[2] = -1.0 * radius;
- boundingBox[3] = radius;
- }
- else
- { if (thetaMax >= 180.0)
- { boundingBox[2] = radius * sin((double)(toRadians((thetaMax))));
- boundingBox[3] = radius;
- }
- else
- { if (thetaMax >= 90.0)
- { boundingBox[2] = 0.0;
- boundingBox[3] = radius;
- }
- else
- { boundingBox[2] = 0.0;
- boundingBox[3] = radius * sin((double)(toRadians((thetaMax))));
- }
- }
- }
-
- if (zMin < 0.0)
- { if ((-1.0 * radius) < zMin) // not a full sphere in negative Z
- { boundingBox[4] = zMin;
- }
- else
- { boundingBox[4] = -1.0 * radius;
- }
- }
- else
- { boundingBox[4] = zMin;
- }
-
- if (zMax < 0.0)
- { boundingBox[5] = zMax;
- }
- else
- { boundingBox[5] = radius;
- }
-
- //fprintf(stderr, "RIBSphere bbox:\n");
- //fprintf(stderr, "\t bbox : X (%f, %f)\n", boundingBox[0], boundingBox[1]);
- //fprintf(stderr, "\t : Y (%f, %f)\n", boundingBox[2], boundingBox[3]);
- //fprintf(stderr, "\t : Z (%f, %f)\n", boundingBox[4], boundingBox[5]);
-
- dirtyBoundingBox = FALSE;
- return self;
- }
-
- - renderSelf:(WW3DCamera *)camera startingAt:(RtFloat)shutterOpenTime endingAt:(RtFloat)shutterCloseTime
- {
- RiSphereV(radius, zMin, zMax, thetaMax, n, tokens, parms);
-
- return self;
- }
-
- - (BOOL)theSameAs:otherRIBCommand
- {
- if (radius != [otherRIBCommand radius])
- { return NO;
- }
- if (zMin != [otherRIBCommand zMin])
- { return NO;
- }
- if (zMax != [otherRIBCommand zMax])
- { return NO;
- }
-
- return [super theSameAs:otherRIBCommand];
- }
-
-
-
- - (BOOL)isLerpable { return YES; }
-
- // note: because we've made the WWSampleList "safe" for having
- // multiple samples with the same data, it's perfectly valid to return
- // yourself or b
- - lerpWith:b by:(float)uValue
- {
- id newMe = nil;
- RtFloat radiusA, zMinA, zMaxA, thetaMaxA;
- RtFloat radiusB, zMinB, zMaxB, thetaMaxB;
-
-
- if (([self class] != [b class]) || (uValue <= 0.0))
- { return self;
- }
-
- if (uValue >= 1.0)
- { return b;
- }
-
- newMe = [super lerpWith:b by:uValue]; // this makes a copy for us
-
- // okay, now do the specific stuff for this class
- radiusA = [self radius];
- radiusB = [b radius];
- [newMe setRadius:(radiusA + ((radiusB - radiusA) * uValue))];
- zMinA = [self zMin];
- zMinB = [b zMin];
- [newMe setZMin:(zMinA + ((zMinB - zMinA) * uValue))];
- zMaxA = [self zMax];
- zMaxB = [b zMax];
- [newMe setZMax:(zMaxA + ((zMaxB - zMaxA) * uValue))];
- thetaMaxA = [self thetaMax];
- thetaMaxB = [b thetaMax];
- [newMe setThetaMax:(thetaMaxA + ((thetaMaxB - thetaMaxA) * uValue))];
-
- return newMe;
- }
-
-
- - lerpSelfWith:b by:(float)uValue
- {
- RtFloat radiusA, zMinA, zMaxA, thetaMaxA;
- RtFloat radiusB, zMinB, zMaxB, thetaMaxB;
-
-
- if (([self class] != [b class]) || (uValue <= 0.0))
- { return self;
- }
-
- if (uValue >= 1.0)
- { return b;
- }
-
- [super lerpSelfWith:b by:uValue]; // this makes a copy for us
-
- // okay, now do the specific stuff for this class
- radiusA = [self radius];
- radiusB = [b radius];
- [self setRadius:(radiusA + ((radiusB - radiusA) * uValue))];
- zMinA = [self zMin];
- zMinB = [b zMin];
- [self setZMin:(zMinA + ((zMinB - zMinA) * uValue))];
- zMaxA = [self zMax];
- zMaxB = [b zMax];
- [self setZMax:(zMaxA + ((zMaxB - zMaxA) * uValue))];
- thetaMaxA = [self thetaMax];
- thetaMaxB = [b thetaMax];
- [self setThetaMax:(thetaMaxA + ((thetaMaxB - thetaMaxA) * uValue))];
-
- return self;
- }
-
-
-
- - writeEve:(NXStream *)stream atTabLevel:(int)tab
- {
- int i;
-
-
- for (i = 0; i < tab; i++)
- { NXPrintf(stream, "\t");
- }
- NXPrintf(stream, "Sphere %f %f %f %f", radius, zMin, zMax, thetaMax);
- [super writeParameterList:stream];
- return self;
- }
-
-
- - writeInventorAtTime:(float)currentTime to:(NXStream *)stream atTabLevel:(int)tab
- {
- RtFloat umax;
- RtFloat uknots[12];
- RtFloat uk[12] = { 0.0, 0.0, 0.0, 0.25, 0.25, 0.5, 0.5, 0.75, 0.75, 1.0, 1.0, 1.0};
- RtFloat vmin, vmax;
- RtFloat vknots[8];
- RtFloat vk[8] = { 0.0, 0.0, 0.0, 0.5, 0.5, 1.0, 1.0, 1.0};
- RtFloat uspline[9][4] = { {1.0, 0.0, 1.0, 1.0},
- {M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
- {0.0, 1.0, 1.0, 1.0},
- {-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
- {-1.0, 0.0, 1.0, 1.0},
- {-M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
- {0.0, -1.0, 1.0, 1.0},
- {M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
- {1.0, 0.0, 1.0, 1.0}};
- RtFloat vspline[5][4] = { {0.0, 0.0, -1.0, 1.0},
- {M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2},
- {1.0, 1.0, 0.0, 1.0},
- {M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
- {0.0, 0.0, 1.0, 1.0}};
- RtFloat r[4];
- int i, j, k;
-
-
- umax = [self thetaMax] / 360.0;
- for (i=0; i<12; i++)
- uknots[i] = uk[i] / umax;
-
- vmin = [self zMin] / [self radius];
- vmax = [self zMax] / [self radius];
- if (vmin < -1.0) vmin = -1.0;
- if (vmax > 1.0) vmax = 1.0;
- vmin = (asin(vmin) + M_PI_2) / M_PI;
- vmax = (asin(vmax) + M_PI_2) / M_PI;
- for (i=0; i<8; i++)
- vknots[i] = (vk[i] - vmin) / (vmax - vmin);
-
- r[0] = [self radius];
- r[1] = [self radius];
- r[2] = [self radius];
- r[3] = 1.0;
-
- for (i = 0; i < tab; i++)
- { NXPrintf(stream, "\t");
- }
- NXPrintf(stream, "# ");
- [self writeEve:stream atTabLevel:0];
- NXPrintf(stream, "\n");
-
- for (i = 0; i < tab; i++)
- { NXPrintf(stream, "\t");
- }
- NXPrintf(stream, "# since Inventor doesn't directly support quadrics in any terribly useful way (sigh), we turn it into a NURBS surface:\n");
-
- for (i = 0; i < tab; i++)
- { NXPrintf(stream, "\t");
- }
- NXPrintf(stream, "Separator {\n");
-
- for (i = 0; i < (tab+1); i++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "Coordinate4 {\n");
- for (i = 0; i < (tab+2); i++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "point [");
-
- for (i=0; i<4; i++)
- { for (j=0; j<9; j++)
- { if (!i && !j)
- { NXPrintf(stream,
- "%f %f %f %f,\n",
- (r[0] * uspline[j][0] * vspline[i][0]),
- (r[1] * uspline[j][1] * vspline[i][1]),
- (r[2] * uspline[j][2] * vspline[i][2]),
- (r[3] * uspline[j][3] * vspline[i][3]));
- }
- else
- { NXPrintf(stream,
- " %f %f %f %f,\n",
- (r[0] * uspline[j][0] * vspline[i][0]),
- (r[1] * uspline[j][1] * vspline[i][1]),
- (r[2] * uspline[j][2] * vspline[i][2]),
- (r[3] * uspline[j][3] * vspline[i][3]));
- }
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- }
- }
- for (j=0; j<8; j++)
- { NXPrintf(stream,
- " %f %f %f %f,\n",
- (r[0] * uspline[j][0] * vspline[i][0]),
- (r[1] * uspline[j][1] * vspline[i][1]),
- (r[2] * uspline[j][2] * vspline[i][2]),
- (r[3] * uspline[j][3] * vspline[i][3]));
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- }
- NXPrintf(stream,
- " %f %f %f %f]\n",
- (r[0] * uspline[j][0] * vspline[i][0]),
- (r[1] * uspline[j][1] * vspline[i][1]),
- (r[2] * uspline[j][2] * vspline[i][2]),
- (r[3] * uspline[j][3] * vspline[i][3]));
- for (k = 0; k < (tab+1); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "}\n");
-
- for (k = 0; k < (tab+1); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "NurbsSurface {\n");
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "numUControlPoints 9\n");
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "numVControlPoints 5\n");
-
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "uKnotVector [");
- for (i=0; i<11; i++)
- { NXPrintf(stream, "%f, ", uknots[i]);
- }
- NXPrintf(stream, "%f]\n", uknots[i]);
-
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "vKnotVector [");
- for (i=0; i<7; i++)
- { NXPrintf(stream, "%f, ", vknots[i]);
- }
- NXPrintf(stream, "%f]\n", vknots[i]);
- for (k = 0; k < (tab+1); k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "}\n");
- for (k = 0; k < tab; k++) { NXPrintf(stream, "\t"); }
- NXPrintf(stream, "}\n");
-
- return self;
- }
-
- #define typeVector "fff"
- #define typeValues &radius, &zMin, &zMax
-
- - read:(NXTypedStream*)stream
- {
- int version;
- [super read:stream];
-
- version = NXTypedStreamClassVersion(stream,"RIBSphere");
- if (version == 0) NXReadTypes(stream,"i",&version), version=1;
- if (version == 1)
- { NXReadTypes(stream,typeVector,typeValues);
- }
- else
- {
- }
- return self;
- }
-
- - write:(NXTypedStream*)stream
- {
- [super write:stream];
-
- NXWriteTypes(stream,typeVector, typeValues);
-
- return self;
- }
-
-
- @end
-