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{ DGLUT.PAS }{ Bob Crawford F.L.A.S.K. June, 1997 }{ DGLUT is an Object Pascal translation of a small part of Mark Kilgard's GLUT library for OpenGL. Included here are just the shape-drawing routines from glut_shapes.c and the teapot routines from glut_teapot.c. Following is the original copyright notices from those files. }{ Copyright (c) Mark J. Kilgard, 1994. /** (c) Copyright 1993, Silicon Graphics, Inc. ALL RIGHTS RESERVED Permission to use, copy, modify, and distribute this software for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both the copyright notice and this permission notice appear in supporting documentation, and that the name of Silicon Graphics, Inc. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. US Government Users Restricted Rights Use, duplication, or disclosure by the Government is subject to restrictions set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or in similar or successor clauses in the FAR or the DOD or NASA FAR Supplement. Unpublished-- rights reserved under the copyright laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. OpenGL(TM) is a trademark of Silicon Graphics, Inc. } unit DGLUT;interface uses OpenGL12; type TGLfloat3v = array[0..2] of TGLfloat; TInteger3v = array[0..2] of Integer;const BoxPoints : Array[0..5, 0..2] of TGLfloat = ( (-1, 0, 0), ( 0, 1, 0), ( 1, 0, 0), ( 0, -1, 0), ( 0, 0, 1), ( 0, 0, -1) ); BoxFaces : Array[0..5, 0..3] of TGLint = ( (0, 1, 2, 3), (3, 2, 6, 7), (7, 6, 5, 4), (4, 5, 1, 0), (5, 6, 2, 1), (7, 4, 0, 3) ); { Octahedron data: The octahedron produced is centered at the origin and has radius 1.0 } OctData : Array[0..5] of TGLfloat3v = ( (1.0, 0.0, 0.0), (-1.0, 0.0, 0.0), (0.0, 1.0, 0.0), (0.0, -1.0, 0.0), (0.0, 0.0, 1.0), (0.0, 0.0, -1.0) ); OctIndex : Array[0..7] of TInteger3v = ( (0, 4, 2), (1, 2, 4), (0, 3, 4), (1, 4, 3), (0, 2, 5), (1, 5, 2), (0, 5, 3), (1, 3, 5) ); { Icosahedron data: These numbers are rigged to make an icosahedron of radius 1.0 } IcoX = 0.525731112119133606; IcoZ = 0.850650808352039932; IcoData : Array[0..11] of TGLfloat3v = ( (-IcoX, 0, IcoZ), ( IcoX, 0, IcoZ), (-IcoX, 0, -IcoZ), ( IcoX, 0, -IcoZ), ( 0, IcoZ, IcoX), ( 0, IcoZ, -IcoX), ( 0, -IcoZ, IcoX), ( 0, -IcoZ, -IcoX), ( IcoZ, IcoX, 0), (-IcoZ, IcoX, 0), ( IcoZ, -IcoX, 0), (-IcoZ, -IcoX, 0) ); IcoIndex : Array[0..19] of TInteger3v = ( (0, 4, 1), (0, 9, 4), (9, 5, 4), (4, 5, 8), (4, 8, 1), (8, 10, 1), (8, 3, 10), (5, 3, 8), (5, 2, 3), (2, 7, 3), (7, 10, 3), (7, 6, 10), (7, 11, 6), (11, 0, 6), (0, 1, 6), (6, 1, 10), (9, 0, 11), (9, 11, 2), (9, 2, 5), (7, 2, 11) ); { Tetrahedron data } TetT = 1.73205080756887729; TetData : Array[0..3] of TGLfloat3v = ( ( TetT, TetT, TetT), ( TetT, -TetT, -TetT), (-TetT, TetT, -TetT), (-TetT, -TetT, TetT) ); TetIndex : Array[0..3] of TInteger3v = ( (0, 1, 3), (2, 1, 0), (3, 2, 0), (1, 2, 3) ); { Teapot stuff } { Rim, body, lid, and bottom data must be reflected in x and y; handle and spout data across the y axis only. } PatchData : Array[0..9, 0..15] of TGLint = ( { Rim } (102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), { Body } ( 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27), ( 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40), { Lid *} ( 96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3), ( 0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117), { Bottom } (118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37), { Handle } ( 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56), ( 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67), { Spout } ( 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83), ( 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95) ); TeaData : Array[0..126, 0..2] of TGLfloat = ( ( 0.2, 0, 2.7), ( 0.2, -0.112, 2.7), ( 0.112, -0.2, 2.7), ( 0, -0.2, 2.7), (1.3375, 0, 2.53125), (1.3375, -0.749, 2.53125), ( 0.749, -1.3375, 2.53125), ( 0, -1.3375, 2.53125), (1.4375, 0, 2.53125), (1.4375, -0.805, 2.53125), ( 0.805, -1.4375, 2.53125), ( 0, -1.4375, 2.53125), ( 1.5, 0, 2.4), ( 1.5, -0.84, 2.4), ( 0.84, -1.5, 2.4), ( 0, -1.5, 2.4), ( 1.75, 0, 1.875), ( 1.75, -0.98, 1.875), ( 0.98, -1.75, 1.875), ( 0, -1.75, 1.875), ( 2, 0, 1.35), ( 2, -1.12, 1.35), ( 1.12, -2, 1.35), ( 0, -2, 1.35), ( 2, 0, 0.9), ( 2, -1.12, 0.9), ( 1.12, -2, 0.9), ( 0, -2, 0.9), ( -2, 0, 0.9), ( 2, 0, 0.45), ( 2, -1.12, 0.45), ( 1.12, -2, 0.45), ( 0, -2, 0.45), ( 1.5, 0, 0.225), ( 1.5, -0.84, 0.225), ( 0.84, -1.5, 0.225), ( 0, -1.5, 0.225), ( 1.5, 0, 0.15), ( 1.5, -0.84, 0.15), ( 0.84, -1.5, 0.15), ( 0, -1.5, 0.15), ( -1.6, 0, 2.025), ( -1.6, -0.3, 2.025), ( -1.5, -0.3, 2.25), ( -1.5, 0, 2.25), ( -2.3, 0, 2.025), ( -2.3, -0.3, 2.025), ( -2.5, -0.3, 2.25), ( -2.5, 0, 2.25), ( -2.7, 0, 2.025), ( -2.7, -0.3, 2.025), ( -3, -0.3, 2.25), ( -3, 0, 2.25), ( -2.7, 0, 1.8), ( -2.7, -0.3, 1.8), ( -3, -0.3, 1.8), ( -3, 0, 1.8), ( -2.7, 0, 1.575), ( -2.7, -0.3, 1.575), ( -3, -0.3, 1.35), ( -3, 0, 1.35), ( -2.5, 0, 1.125), ( -2.5, -0.3, 1.125), ( -2.65, -0.3, 0.9375), ( -2.65, 0, 0.9375), ( -2, -0.3, 0.9), ( -1.9, -0.3, 0.6), ( -1.9, 0, 0.6), ( 1.7, 0, 1.425), ( 1.7, -0.66, 1.425), ( 1.7, -0.66, 0.6), ( 1.7, 0, 0.6), ( 2.6, 0, 1.425), ( 2.6, -0.66, 1.425), ( 3.1, -0.66, 0.825), ( 3.1, 0, 0.825), ( 2.3, 0, 2.1), ( 2.3, -0.25, 2.1), ( 2.4, -0.25, 2.025), ( 2.4, 0, 2.025), ( 2.7, 0, 2.4), ( 2.7, -0.25, 2.4), ( 3.3, -0.25, 2.4), ( 3.3, 0, 2.4), ( 2.8, 0, 2.475), ( 2.8, -0.25, 2.475), ( 3.525, -0.25, 2.49375), ( 3.525, 0, 2.49375), ( 2.9, 0, 2.475), ( 2.9, -0.15, 2.475), ( 3.45, -0.15, 2.5125), ( 3.45, 0, 2.5125), ( 2.8, 0, 2.4), ( 2.8, -0.15, 2.4), ( 3.2, -0.15, 2.4), ( 3.2, 0, 2.4), ( 0, 0, 3.15), ( 0.8, 0, 3.15), ( 0.8, -0.45, 3.15), ( 0.45, -0.8, 3.15), ( 0, -0.8, 3.15), ( 0, 0, 2.85), ( 1.4, 0, 2.4), ( 1.4, -0.784, 2.4), ( 0.784, -1.4, 2.4), ( 0, -1.4, 2.4), ( 0.4, 0, 2.55), ( 0.4, -0.224, 2.55), ( 0.224, -0.4, 2.55), ( 0, -0.4, 2.55), ( 1.3, 0, 2.55), ( 1.3, -0.728, 2.55), ( 0.728, -1.3, 2.55), ( 0, -1.3, 2.55), ( 1.3, 0, 2.4), ( 1.3, -0.728, 2.4), ( 0.728, -1.3, 2.4), ( 0, -1.3, 2.4), ( 0, 0, 0), ( 1.425, -0.798, 0), ( 1.5, 0, 0.075), ( 1.425, 0, 0), ( 0.798, -1.425, 0), ( 0, -1.5, 0.075), ( 0, -1.425, 0), ( 1.5, -0.84, 0.075), ( 0.84, -1.5, 0.075) ); TeaTex : Array[0..1, 0..1, 0..1] of TGLFloat = ( ((0, 0), (1, 0)), ((0, 1), (1, 1)) ); procedure DrawBox(Size : TGLFloat; DrawType : TGLenum);procedure glutWireCube(Size : TglDouble);procedure glutSolidCube(Size : TglDouble); procedure glutWireSphere( Radius : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutSolidSphere( Radius : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutWireCone( Base : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutSolidCone( Base : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); //jhadd procedure glutWireCylinder( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutSolidCylinder( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutWireTube( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutSolidTube( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint); procedure glutWireTorus( innerRadius : TglDouble; outerRadius :TglDouble; nsides : TGLint; rings : TGLint); procedure glutSolidTorus( innerRadius : TglDouble; outerRadius :TglDouble; nsides : TGLint; rings : TGLint); procedure glutWireDodecahedron; procedure glutSolidDodecahedron;procedure Octaheadron(ShadeType : TGLenum);procedure glutWireOctaheadron;procedure glutSolidOctaheadron;procedure Icosahedron(ShadeType : TGLenum);procedure glutWireIcosahedron;procedure glutSolidIcosahedron;procedure Tetrahedron(ShadeType : TGLenum);procedure glutWireTetrahedron;procedure glutSolidTetrahedron;{ Teapot stuff }procedure Teapot(Grid : TGLint; Scale : TglDouble; ShadeType : TGLenum);procedure glutWireTeapot(Scale : TglDouble);procedure glutSolidTeapot(Scale : TglDouble); { Generally useful stuff } procedure Diff3(a0, a1, a2, b0, b1, b2 : TGLFloat; var c : array of TGLFloat); procedure CrossProd(v1, v2 : array of TGLFloat; var prod : array of TGLFloat);procedure Normalize(var v : array of TGLFloat); var quadObj : pGLUquadricObj=nil; dodec : array[0..19, 0..2] of TGLFloat; implementationprocedure DrawBox(Size : TGLFloat; DrawType : TGLenum);var V : array[0..7, 0..2] of TGLFloat; I : TGLint; HalfSize : TGLFloat; begin { DrawBox } HalfSize := Size / 2; V[0, 0] := -HalfSize; V[1, 0] := -HalfSize; V[2, 0] := -HalfSize; V[3, 0] := -HalfSize; V[4, 0] := HalfSize; V[5, 0] := HalfSize; V[6, 0] := HalfSize; V[7, 0] := HalfSize; V[0, 1] := -HalfSize; V[1, 1] := -HalfSize; V[4, 1] := -HalfSize; V[5, 1] := -HalfSize; V[2, 1] := HalfSize; V[3, 1] := HalfSize; V[6, 1] := HalfSize; V[7, 1] := HalfSize; V[0, 2] := -HalfSize; V[3, 2] := -HalfSize; V[4, 2] := -HalfSize; V[7, 2] := -HalfSize; V[1, 2] := HalfSize; V[2, 2] := HalfSize; V[5, 2] := HalfSize; V[6, 2] := HalfSize; for I := 0 to 5 do begin glBegin(DrawType); glNormal3fv(@BoxPoints[I, 0]); glVertex3fv(@V[BoxFaces[I, 0], 0]); glVertex3fv(@V[BoxFaces[I, 1], 0]); glVertex3fv(@V[BoxFaces[I, 2], 0]); glVertex3fv(@V[BoxFaces[I, 3], 0]); glEnd; end;end; { DrawBox }procedure glutWireSphere( Radius : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutWireSphere } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_LINE); gluQuadricNormals(quadObj, GLU_SMOOTH); gluSphere(quadObj, Radius, Slices, Stacks); gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutWireSphere }procedure glutSolidSphere( Radius : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutSolidSphere } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_FILL); gluQuadricNormals(quadObj, GLU_SMOOTH); gluSphere(quadObj, Radius, Slices, Stacks); gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutSolidSphere }procedure glutWireCube(Size : TglDouble);begin { glutWireCube } DrawBox(Size, GL_LINE_LOOP);end; { glutWireCube }procedure glutSolidCube(Size : TglDouble);begin { glutSolidCube } DrawBox(Size, GL_QUADS);end; { glutSolidCube }procedure glutWireCone( Base : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutWireCone } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_LINE); gluQuadricNormals(quadObj, GLU_SMOOTH); gluCylinder(quadObj, base, 0.0, height, slices, stacks); gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutWireCone }procedure glutSolidCone( Base : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutSolidCone } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_FILL); gluQuadricNormals(quadObj, GLU_SMOOTH); gluCylinder(quadObj, base, 0.0, height, slices, stacks); gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutSolidCone } //jhaddprocedure glutWireCylinder( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutWireCylinder } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_LINE); gluQuadricNormals(quadObj, GLU_SMOOTH); glPushMatrix; glTranslatef(0.0,0.0,height/2); gluDisk( quadObj, 0.0, Radius, slices,stacks); glPopMatrix; glPushMatrix; glTranslatef(0.0,0.0,-height/2); gluDisk( quadObj, 0.0, Radius,slices,stacks); gluCylinder(quadObj, Radius, Radius, height, slices, stacks); glPopMatrix; gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutWireCylinder }procedure glutSolidCylinder( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutSolidCylinder } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_FILL); gluQuadricNormals(quadObj, GLU_SMOOTH); glPushMatrix; glTranslatef(0.0,0.0,height/2); gluDisk( quadObj, 0.0, Radius, slices,stacks); glPopMatrix; glPushMatrix; glTranslatef(0.0,0.0,-height/2); gluDisk( quadObj, 0.0, Radius,slices,stacks); gluCylinder(quadObj, Radius, Radius, height, slices, stacks); glPopMatrix; gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutSolidCylinder }procedure glutWireTube( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutWireTube } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_LINE); gluQuadricNormals(quadObj, GLU_SMOOTH); glPushMatrix; glTranslatef(0.0,0.0,-height/2); gluCylinder(quadObj, Radius, Radius, height, slices, stacks); glPopMatrix; gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutWireTube }procedure glutSolidTube( Radius : TglDouble; Height : TglDouble; Slices : TGLint; Stacks : TGLint);begin { glutSolidTube } if quadObj = nil then quadObj := gluNewQuadric; gluQuadricDrawStyle(quadObj, GLU_FILL); gluQuadricNormals(quadObj, GLU_SMOOTH); glPushMatrix; glTranslatef(0.0,0.0,-height/2); gluCylinder(quadObj, Radius, Radius, height, slices, stacks); glPopMatrix; gluDeleteQuadric(quadObj); QuadObj:=nil;end; { glutSolidTube }procedure Doughnut( inr : TGLFloat; outR : TGLFloat; nsides : TGLint; rings : TGLint; DrawType :TGLenum);var i, j : integer; theta, phi, theta1, phi1 : TGLFloat; p0, p1, p2, p3, n0, n1, n2, n3 : array[0..2] of TGLFloat;begin { Doughnut } for i := 0 to rings - 1 do begin theta := i *2.0 * PI / rings; theta1 := (i + 1) * 2.0 * PI / rings; for j := 0 to nsides - 1 do begin phi := j *2.0 * PI / nsides; phi1 := (j + 1) * 2.0 * PI / nsides; p0[0] := cos(theta) * (outR + inr * cos(phi)); p0[1] := -sin(theta) * (outR + inr * cos(phi)); p0[2] := inr * sin(phi); p1[0] := cos(theta1) * (outR + inr * cos(phi)); p1[1] := -sin(theta1) * (outR + inr * cos(phi)); p1[2] := inr * sin(phi); p2[0] := cos(theta1) * (outR + inr * cos(phi1)); p2[1] := -sin(theta1) * (outR + inr * cos(phi1)); p2[2] := inr * sin(phi1); p3[0] := cos(theta) * (outR + inr * cos(phi1)); p3[1] := -sin(theta) * (outR + inr * cos(phi1)); p3[2] := inr * sin(phi1); n0[0] := cos(theta) * (cos(phi)); n0[1] := -sin(theta) * (cos(phi)); n0[2] := sin(phi); n1[0] := cos(theta1) * (cos(phi)); n1[1] := -sin(theta1) * (cos(phi)); n1[2] := sin(phi); n2[0] := cos(theta1) * (cos(phi1)); n2[1] := -sin(theta1) * (cos(phi1)); n2[2] := sin(phi1); n3[0] := cos(theta) * (cos(phi1)); n3[1] := -sin(theta) * (cos(phi1)); n3[2] := sin(phi1); glBegin(DrawType); glNormal3fv(@n3[0]); glVertex3fv(@p3[0]); glNormal3fv(@n2[0]); glVertex3fv(@p2[0]); glNormal3fv(@n1[0]); glVertex3fv(@p1[0]); glNormal3fv(@n0[0]); glVertex3fv(@p0[0]); glEnd(); end; end;end; { Doughnut }procedure glutWireTorus( innerRadius : TglDouble; outerRadius :TglDouble; nsides : TGLint; rings : TGLint);begin { glutWireTorus } Doughnut(innerRadius, outerRadius, nsides, rings, GL_LINE_LOOP);end; { glutWireTorus }procedure glutSolidTorus( innerRadius : TglDouble; outerRadius :TglDouble; nsides : TGLint; rings : TGLint);begin { glutSolidTorus } Doughnut(innerRadius, outerRadius, nsides, rings, GL_QUADS);end; { glutSolidTorus }procedure initDodecahedron;var alpha, beta : TGLFloat; begin { initDodecahedron } alpha := sqrt(2.0 / (3.0 + sqrt(5.0))); beta := 1.0 + sqrt(6.0 / (3.0 + sqrt(5.0)) - 2.0 + 2.0 * sqrt(2.0 / (3.0 + sqrt(5.0)))); dodec[0, 0] := -alpha; dodec[0, 1] := 0; dodec[0, 2] := beta; dodec[1, 0] := alpha; dodec[1, 1] := 0; dodec[1, 2] := beta; dodec[2, 0] := -1; dodec[2, 1] := -1; dodec[2, 2] := -1; dodec[3, 0] := -1; dodec[3, 1] := -1; dodec[3, 2] := 1; dodec[4, 0] := -1; dodec[4, 1] := 1; dodec[4, 2] := -1; dodec[5, 0] := -1; dodec[5, 1] := 1; dodec[5, 2] := 1; dodec[6, 0] := 1; dodec[6, 1] := -1; dodec[6, 2] := -1; dodec[7, 0] := 1; dodec[7, 1] := -1; dodec[7, 2] := 1; dodec[8, 0] := 1; dodec[8, 1] := 1; dodec[8, 2] := -1; dodec[9, 0] := 1; dodec[9, 1] := 1; dodec[9, 2] := 1; dodec[10, 0] := beta; dodec[10, 1] := alpha; dodec[10, 2] := 0; dodec[11, 0] := beta; dodec[11, 1] := -alpha; dodec[11, 2] := 0; dodec[12, 0] := -beta; dodec[12, 1] := alpha; dodec[12, 2] := 0; dodec[13, 0] := -beta; dodec[13, 1] := -alpha; dodec[13, 2] := 0; dodec[14, 0] := -alpha; dodec[14, 1] := 0; dodec[14, 2] := -beta; dodec[15, 0] := alpha; dodec[15, 1] := 0; dodec[15, 2] := -beta; dodec[16, 0] := 0; dodec[16, 1] := beta; dodec[16, 2] := alpha; dodec[17, 0] := 0; dodec[17, 1] := beta; dodec[17, 2] := -alpha; dodec[18, 0] := 0; dodec[18, 1] := -beta; dodec[18, 2] := alpha; dodec[19, 0] := 0; dodec[19, 1] := -beta; dodec[19, 2] := -alpha; end; { initDodecaheadron }procedure Diff3( a0, a1, a2, b0, b1, b2 : TGLFloat; var c : array of TGLFloat);begin { Diff3 } c[0] := a0 - b0; c[1] := a1 - b1; c[2] := a2 - b2;end; { Diff3 }procedure CrossProd( v1, v2 : array of TGLFloat; var prod : array of TGLFloat);var p : array[0..2] of TGLFloat;begin { CrossProd } p[0] := v1[1] * v2[2] - v2[1] * v1[2]; p[1] := v1[2] * v2[0] - v2[2] * v1[0]; p[2] := v1[0] * v2[1] - v2[0] * v1[1]; prod[0] := p[0]; prod[1] := p[1]; prod[2] := p[2]; end; { CrossProd }procedure Normalize(var v : array of TGLFloat);var d : TGLFloat;begin { Normalize } d := sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]); d := 1 / d; v[0] := v[0] * d; v[1] := v[1] * d; v[2] := v[2] * d; end; { Normalize }procedure Pentagon(a, b, c, d, e : integer; shadeType : TGLenum);var n0, d1, d2 : array[0..2] of TGLFloat;begin { Pentagon } Diff3(dodec[a, 0], dodec[a, 1], dodec[1, 2], dodec[b, 0], dodec[b, 1], dodec[b, 2], d1); Diff3(dodec[b, 0], dodec[b, 1], dodec[b, 2], dodec[c, 0], dodec[c, 1], dodec[c, 2], d2); CrossProd(d1, d2, n0); Normalize(n0); glBegin(shadeType); glNormal3fv(@n0[0]); glVertex3fv(@dodec[a, 0]); glVertex3fv(@dodec[b, 0]); glVertex3fv(@dodec[c, 0]); glVertex3fv(@dodec[d, 0]); glVertex3fv(@dodec[e, 0]); glEnd(); end; { Pentagon } procedure Dodecahedron(DrawType : TGLenum);begin { Dodecahedron } pentagon(0, 1, 9, 16, 5, DrawType); pentagon(1, 0, 3, 18, 7, DrawType); pentagon(1, 7, 11, 10, 9, DrawType); pentagon(11, 7, 18, 19, 6, DrawType); pentagon(8, 17, 16, 9, 10, DrawType); pentagon(2, 14, 15, 6, 19, DrawType); pentagon(2, 13, 12, 4, 14, DrawType); pentagon(2, 19, 18, 3, 13, DrawType); pentagon(3, 0, 5, 12, 13, DrawType); pentagon(6, 15, 8, 10, 11, DrawType); pentagon(4, 17, 8, 15, 14, DrawType); pentagon(4, 12, 5, 16, 17, DrawType); end; { Dodecahedron } procedure glutWireDodecahedron;begin { glutWireDodecahedron } Dodecahedron(GL_LINE_LOOP); end; { glutWireDodecahedron } procedure glutSolidDodecahedron; begin { glutSolidDodecahedron } Dodecahedron(GL_TRIANGLE_FAN); end; { glutSolidDodecahedron } procedure RecordItem(n1, n2, n3 : array of TGLFloat; ShadeType : TGLenum);var q0, q1 : array[0..2] of TGLFloat;begin { RecordItem } Diff3(n1[0], n1[1], n1[2], n2[0], n2[1], n2[2], q0); Diff3(n2[0], n2[1], n2[2], n3[0], n3[1], n3[2], q1); CrossProd(q0, q1, q1); Normalize(q1); glBegin(shadeType); glNormal3fv(@q1[0]); glVertex3fv(@n1[0]); glVertex3fv(@n2[0]); glVertex3fv(@n3[0]); glEnd; end; { RecordItem } procedure SubDivide( v0, v1, v2 : array of TGLFloat; ShadeType : TGLenum); var Depth : Integer; w0, w1, w2 : array[0..2] of TGLFloat; l : TGLFloat; i, j, k, n : Integer; begin { SubDivide } Depth := 1; for i := 0 to Depth - 1 do begin j := 0; while i + j < Depth do begin k := depth - i - j; for n := 0 to 2 do begin w0[n] := (i * v0[n] + j * v1[n] + k * v2[n]) / depth; w1[n] := ((i + 1) * v0[n] + j * v1[n] + (k - 1) * v2[n]) / depth; w2[n] := (i * v0[n] + (j + 1) * v1[n] + (k - 1) * v2[n]) / depth; end; l := sqrt(w0[0] * w0[0] + w0[1] * w0[1] + w0[2] * w0[2]); w0[0] := w0[0] / l; w0[1] := w0[1] / l; w0[2] := w0[2] / l; l := sqrt(w1[0] * w1[0] + w1[1] * w1[1] + w1[2] * w1[2]); w1[0] := w1[0] / l; w1[1] := w1[1] / l; w1[2] := w1[2] / l; l := sqrt(w2[0] * w2[0] + w2[1] * w2[1] + w2[2] * w2[2]); w2[0] := w2[0] / l; w2[1] := w2[1] / l; w2[2] := w2[2] / l; RecordItem(w1, w0, w2, ShadeType); Inc(j); end; end; end; { SubDivide } procedure DrawTriangle( I : Integer; Data : Array of TGLfloat3v; NDX : Array of TInteger3v; ShadeType : TGLenum); var X0, X1, X2 : TGLfloat3v; begin { DrawTriangle } X0 := Data[NDX[i, 0]]; X1 := Data[NDX[i, 1]]; X2 := Data[NDX[i, 2]]; SubDivide(X0, X1, X2, ShadeType); end; { DrawTriangle } procedure Octaheadron(ShadeType : TGLenum); var I : Integer; begin { Octaheadron } for I := 0 to 7 do DrawTriangle(I, OctData, OctIndex, ShadeType); end; { Octaheadron } procedure glutWireOctaheadron; begin { glutWireOctaheadron } Octaheadron(GL_LINE_LOOP); end; { glutWireOctaheadron } procedure glutSolidOctaheadron;begin { glutSolidOctaheadron } Octaheadron(GL_TRIANGLES); end; { glutSolidOctaheadron } procedure Icosahedron(ShadeType : TGLenum); var I : Integer; begin { Icosahedron } for I := 0 to 19 do DrawTriangle(I, IcoData, IcoIndex, ShadeType); end; { Icosahedron } procedure glutWireIcosahedron;begin { glutWireIcosahedron } Icosahedron(GL_LINE_LOOP);end; { glutWireIcosahedron }procedure glutSolidIcosahedron;begin { glutSolidIcosahedron } Icosahedron(GL_TRIANGLES); end; { glutSolidIcosahedron } procedure Tetrahedron(ShadeType : TGLenum); var I : Integer; begin { Tetrahedron } for I := 0 to 3 do DrawTriangle(I, TetData, TetIndex, ShadeType); end; { Tetrahedron } procedure glutWireTetrahedron;begin { glutWireTetrahedron } Tetrahedron(GL_LINE_LOOP);end; { glutWireTetrahedron } procedure glutSolidTetrahedron;begin { glutSolidTetrahedron } Tetrahedron(GL_TRIANGLES); end; { glutSolidTetrahedron } { Teapot stuff }procedure Teapot(Grid : TGLint; Scale : TglDouble; ShadeType : TGLenum);var P, Q, R, S : Array[0..3, 0..3, 0..2] of TGLFloat; I, J, K, L : TGLint;begin { Teapot } glPushAttrib(GL_ENABLE_BIT or GL_EVAL_BIT); glEnable(GL_AUTO_NORMAL); glEnable(GL_NORMALIZE); glEnable(GL_MAP2_VERTEX_3); glEnable(GL_MAP2_TEXTURE_COORD_2); glPushMatrix; glRotatef(270.0, 1.0, 0.0, 0.0); glScalef(0.5 * Scale, 0.5 * Scale, 0.5 * Scale); glTranslatef(0.0, 0.0, -1.5); for I := 0 to 9 do begin for J := 0 to 3 do for K := 0 to 3 do for L := 0 to 2 do begin P[J, K, L] := TeaData[PatchData[I, J * 4 + K], L]; Q[J, K, L] := TeaData[PatchData[I, J * 4 + (3 - K)], L]; if L = 1 then Q[J, K, L] := -Q[J, K, L]; if i < 6 then begin R[J, K, L] := TeaData[PatchData[I, J * 4 + (3 - K)], L]; if L = 0 then R[J, K, L] := -R[J, K, L]; S[J, K, L] := TeaData[PatchData[I, J * 4 + K], L]; if L = 0 then S[J, K, L] := -S[J, K, L]; if L = 1 then S[J, K, L] := -S[J, K, L]; end; end; glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, @TeaTex[0,0,0]); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, @P[0, 0, 0]); glMapGrid2f(Grid, 0.0, 1.0, Grid, 0.0, 1.0); glEvalMesh2(ShadeType, 0, Grid, 0, Grid); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, @Q[0, 0, 0]); glEvalMesh2(ShadeType, 0, Grid, 0, Grid); if I < 6 then begin glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, @R[0, 0, 0]); glEvalMesh2(ShadeType, 0, Grid, 0, Grid); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, @S[0, 0, 0]); glEvalMesh2(ShadeType, 0, Grid, 0, Grid); end; end; glPopMatrix; glPopAttrib; end; { Teapot } procedure glutWireTeapot(Scale : TglDouble);begin { glutWireTeapot } Teapot(10, Scale, GL_LINE); end; { glutWireTeapot } procedure glutSolidTeapot(Scale : TglDouble); begin { glutSolidTeapot } Teapot(14, Scale, GL_FILL); end; { glutSolidTeapot } initialization initDodecahedron; end.