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- // copyright 1993 Michael B. Johnson; some portions copyright 1994, MIT
- // see COPYRIGHT for reuse legalities
- //
-
- #import "RIBDisk.h"
- #import <stdio.h>
-
-
- @implementation RIBDisk
-
-
- + initialize { return [RIBDisk setVersion:1], self; }
-
- - (BOOL)hasBoundingBox { return YES; }
-
- - init
- {
- [super init];
-
- height = 1.0;
- radius = 1.0;
-
- return self;
- }
-
- - setHeight:(RtFloat)newHeight
- radius:(RtFloat)newRadius
- thetaMax:(RtFloat)newThetaMax
- n:(int)newN tokens:(RtToken *)newTokens parms:(RtPointer *)newParms archiveVector:(char **)newArchiveVector
- printfTypeVector:(int *)newPrintfTypeVector printfNVector:(int *)newPrintfNVector
- {
- height = newHeight;
- radius = newRadius;
- thetaMax = newThetaMax;
- [self setN:newN tokens:newTokens parms:newParms archiveVector:newArchiveVector printfTypeVector:newPrintfTypeVector printfNVector:newPrintfNVector];
-
- dirtyBoundingBox = TRUE;
- return self;
- }
-
- - setHeight:(RtFloat)newHeight { height = newHeight; dirtyBoundingBox = TRUE; return self; }
- - setRadius:(RtFloat)newRadius { radius = newRadius; dirtyBoundingBox = TRUE; return self; }
-
- - (RtFloat)height { return height; }
- - (RtFloat)radius { return radius; }
-
-
- - 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 (height < 0.0)
- { boundingBox[5] = 0.0;
- boundingBox[4] = height;
- }
- else
- { boundingBox[4] = 0.0;
- boundingBox[5] = height;
- }
-
- dirtyBoundingBox = FALSE;
-
- return self;
- }
-
-
- - (BOOL)isMoot
- {
- if (!radius) { return YES; }
-
- return [super isMoot];
- }
-
- - (BOOL)theSameAs:otherRIBCommand
- {
- if (radius != [otherRIBCommand radius])
- { return NO;
- }
- if (height != [otherRIBCommand height])
- { return NO;
- }
-
- return [super theSameAs:otherRIBCommand];
- }
-
- - renderSelf:(WW3DCamera *)camera startingAt:(RtFloat)shutterOpenTime endingAt:(RtFloat)shutterCloseTime
- {
- RiDiskV(height, radius, thetaMax, n, tokens, parms);
-
- return self;
- }
-
- - (unsigned long int)maxSampleBandwidth { return ([super maxSampleBandwidth] + (unsigned long int)(3 * sizeof(RtFloat))); }
-
- - (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, heightA, thetaMaxA;
- RtFloat radiusB, heightB, 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))];
- heightA = [self height];
- heightB = [b height];
- [newMe setHeight:(heightA + ((heightB - heightA) * uValue))];
- thetaMaxA = [self thetaMax];
- thetaMaxB = [b thetaMax];
- [newMe setThetaMax:(thetaMaxA + ((thetaMaxB - thetaMaxA) * uValue))];
-
- return newMe;
- }
-
-
- - lerpSelfWith:b by:(float)uValue
- {
- RtFloat radiusA, heightA, thetaMaxA;
- RtFloat radiusB, heightB, 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))];
- heightA = [self height];
- heightB = [b height];
- [self setHeight:(heightA + ((heightB - heightA) * 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, "Disk %f %f %f ", height, radius, 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 vknots[4] = {0.0, 0.0, 1.0, 1.0};
- RtFloat xuspline[9][2] = {{1.0, 0.0}, {M_SQRT1_2, -M_SQRT1_2}, {0.0, -1.0}, {-M_SQRT1_2, -M_SQRT1_2},
- {-1.0, 0.0}, {-M_SQRT1_2, M_SQRT1_2}, {0.0, 1.0}, {M_SQRT1_2, M_SQRT1_2}, {1.0, 0.0}};
- RtFloat yuspline[9][2] = {{0.0, 1.0}, {M_SQRT1_2, M_SQRT1_2}, {1.0, 0.0}, {M_SQRT1_2, -M_SQRT1_2}, {0.0, -1.0},
- {-M_SQRT1_2, -M_SQRT1_2}, {-1.0, 0.0}, {-M_SQRT1_2, M_SQRT1_2}, {0.0, 1.0}};
- RtFloat zwuspline[9] = {1.0, M_SQRT1_2, 1.0, M_SQRT1_2, 1.0, M_SQRT1_2, 1.0, M_SQRT1_2, 1.0};
- int i, j, k;
- RtPoint point1, point2;
-
-
- point1[0] = [self radius];
- point1[1] = 0.0;
- point1[2] = [self height];
- point2[0] = 0.0;
- point2[1] = 0.0;
- point2[2] = [self height];
-
- umax = [self thetaMax] / 360.0;
- for (i=0; i<12; i++)
- { uknots[i] = uk[i] / umax;
- }
-
- 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 (j=0; j<9; j++)
- { if (!j)
- { NXPrintf(stream,
- "%f %f %f %f,\n",
- (point1[0] * xuspline[j][0] + point1[1] * xuspline[j][1]),
- (point1[0] * yuspline[j][0] + point1[1] * yuspline[j][1]),
- (point1[2] * zwuspline[j]),
- (zwuspline[j]));
- }
- else
- { NXPrintf(stream,
- " %f %f %f %f,\n",
- (point1[0] * xuspline[j][0] + point1[1] * xuspline[j][1]),
- (point1[0] * yuspline[j][0] + point1[1] * yuspline[j][1]),
- (point1[2] * zwuspline[j]),
- (zwuspline[j]));
- }
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- }
-
- for (j=0; j<8; j++)
- { NXPrintf(stream,
- " %f %f %f %f,\n",
- (point2[0] * xuspline[j][0] + point2[1] * xuspline[j][1]),
- (point2[0] * yuspline[j][0] + point2[1] * yuspline[j][1]),
- (point2[2] * zwuspline[j]),
- (zwuspline[j]));
- for (k = 0; k < (tab+2); k++) { NXPrintf(stream, "\t"); }
- }
- NXPrintf(stream,
- " %f %f %f %f]\n",
- (point2[0] * xuspline[j][0] + point2[1] * xuspline[j][1]),
- (point2[0] * yuspline[j][0] + point2[1] * yuspline[j][1]),
- (point2[2] * zwuspline[j]),
- (zwuspline[j]));
-
- for (k = 0; k < (tab+2); 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 2\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<3; 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 "ff"
- #define typeValues &height, &radius
-
- - read:(NXTypedStream*)stream
- {
- int version;
- [super read:stream];
-
- version = NXTypedStreamClassVersion(stream,"RIBDisk");
- 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
-