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/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 2.0 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** 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.
**
** NOTE: The Original Code (as defined below) has been licensed to Sun
** Microsystems, Inc. ("Sun") under the SGI Free Software License B
** (Version 1.1), shown above ("SGI License"). Pursuant to Section
** 3.2(3) of the SGI License, Sun is distributing the Covered Code to
** you under an alternative license ("Alternative License"). This
** Alternative License includes all of the provisions of the SGI License
** except that Section 2.2 and 11 are omitted. Any differences between
** the Alternative License and the SGI License are offered solely by Sun
** and not by SGI.
**
** 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
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
** $Date: 2009-03-04 17:23:34 -0800 (Wed, 04 Mar 2009) $ $Revision: 1856 $
** $Header$
*/
/*
* Copyright (c) 2002-2004 LWJGL Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'LWJGL' nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*/
package jogamp.opengl.glu;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.glu.GLU;
import com.jogamp.opengl.glu.GLUquadric;
import com.jogamp.opengl.math.FloatUtil;
import com.jogamp.opengl.util.ImmModeSink;
import com.jogamp.opengl.util.glsl.ShaderState;
/**
* GLUquadricImpl.java
*
*
* Created 22-dec-2003 (originally Quadric.java)
* @author Erik Duijs
* @author Kenneth Russell, Sven Gothel
*/
public class GLUquadricImpl implements GLUquadric {
private final boolean useGLSL;
private int drawStyle;
private int orientation;
private boolean textureFlag;
private int normals;
private boolean immModeSinkEnabled;
private boolean immModeSinkImmediate;
public int normalType;
public GL gl;
public ShaderState shaderState;
public int shaderProgram;
public static final boolean USE_NORM = true;
public static final boolean USE_TEXT = false;
private ImmModeSink immModeSink=null;
public GLUquadricImpl(final GL gl, final boolean useGLSL, final ShaderState st, final int shaderProgram) {
this.gl=gl;
this.useGLSL = useGLSL;
this.drawStyle = GLU.GLU_FILL;
this.orientation = GLU.GLU_OUTSIDE;
this.textureFlag = false;
this.normals = GLU.GLU_SMOOTH;
this.normalType = gl.isGLES1()?GL.GL_BYTE:GL.GL_FLOAT;
this.immModeSinkImmediate=true;
this.immModeSinkEnabled=!gl.isGL2();
this.shaderState = st;
this.shaderProgram = shaderProgram;
replaceImmModeSink();
}
@Override
public void enableImmModeSink(final boolean val) {
if(gl.isGL2()) {
immModeSinkEnabled=val;
} else {
immModeSinkEnabled=true;
}
if(null==immModeSink && immModeSinkEnabled) {
replaceImmModeSink();
}
}
@Override
public boolean isImmModeSinkEnabled() {
return immModeSinkEnabled;
}
@Override
public void setImmMode(final boolean val) {
if(immModeSinkEnabled) {
immModeSinkImmediate=val;
} else {
immModeSinkImmediate=true;
}
}
@Override
public boolean getImmMode() {
return immModeSinkImmediate;
}
@Override
public ImmModeSink replaceImmModeSink() {
if(!immModeSinkEnabled) return null;
final ImmModeSink res = immModeSink;
if(useGLSL) {
if(null != shaderState) {
immModeSink = ImmModeSink.createGLSL (32,
3, GL.GL_FLOAT, // vertex
0, GL.GL_FLOAT, // color
USE_NORM?3:0, normalType, // normal
USE_TEXT?2:0, GL.GL_FLOAT, // texCoords
GL.GL_STATIC_DRAW, shaderState);
} else {
immModeSink = ImmModeSink.createGLSL (32,
3, GL.GL_FLOAT, // vertex
0, GL.GL_FLOAT, // color
USE_NORM?3:0, normalType, // normal
USE_TEXT?2:0, GL.GL_FLOAT, // texCoords
GL.GL_STATIC_DRAW, shaderProgram);
}
} else {
immModeSink = ImmModeSink.createFixed(32,
3, GL.GL_FLOAT, // vertex
0, GL.GL_FLOAT, // color
USE_NORM?3:0, normalType, // normal
USE_TEXT?2:0, GL.GL_FLOAT, // texCoords
GL.GL_STATIC_DRAW);
}
return res;
}
@Override
public void resetImmModeSink(final GL gl) {
if(immModeSinkEnabled) {
immModeSink.reset(gl);
}
}
/**
* specifies the draw style for quadrics.
*
* The legal values are as follows:
*
* GLU.FILL: Quadrics are rendered with polygon primitives. The polygons
* are drawn in a counterclockwise fashion with respect to
* their normals (as defined with glu.quadricOrientation).
*
* GLU.LINE: Quadrics are rendered as a set of lines.
*
* GLU.SILHOUETTE: Quadrics are rendered as a set of lines, except that edges
* separating coplanar faces will not be drawn.
*
* GLU.POINT: Quadrics are rendered as a set of points.
*
* @param drawStyle The drawStyle to set
*/
public void setDrawStyle(final int drawStyle) {
this.drawStyle = drawStyle;
}
/**
* specifies what kind of normals are desired for quadrics.
* The legal values are as follows:
*
* GLU.NONE: No normals are generated.
*
* GLU.FLAT: One normal is generated for every facet of a quadric.
*
* GLU.SMOOTH: One normal is generated for every vertex of a quadric. This
* is the default.
*
* @param normals The normals to set
*/
public void setNormals(final int normals) {
this.normals = normals;
}
/**
* specifies what kind of orientation is desired for.
* The orientation values are as follows:
*
* GLU.OUTSIDE: Quadrics are drawn with normals pointing outward.
*
* GLU.INSIDE: Normals point inward. The default is GLU.OUTSIDE.
*
* Note that the interpretation of outward and inward depends on the quadric
* being drawn.
*
* @param orientation The orientation to set
*/
public void setOrientation(final int orientation) {
this.orientation = orientation;
}
/**
* specifies if texture coordinates should be generated for
* quadrics rendered with qobj. If the value of textureCoords is true,
* then texture coordinates are generated, and if textureCoords is false,
* they are not.. The default is false.
*
* The manner in which texture coordinates are generated depends upon the
* specific quadric rendered.
*
* @param textureFlag The textureFlag to set
*/
public void setTextureFlag(final boolean textureFlag) {
this.textureFlag = textureFlag;
}
/**
* Returns the drawStyle.
* @return int
*/
public int getDrawStyle() {
return drawStyle;
}
/**
* Returns the normals.
* @return int
*/
public int getNormals() {
return normals;
}
/**
* Returns the orientation.
* @return int
*/
public int getOrientation() {
return orientation;
}
/**
* Returns the textureFlag.
* @return boolean
*/
public boolean getTextureFlag() {
return textureFlag;
}
/**
* draws a cylinder oriented along the z axis. The base of the
* cylinder is placed at z = 0, and the top at z=height. Like a sphere, a
* cylinder is subdivided around the z axis into slices, and along the z axis
* into stacks.
*
* Note that if topRadius is set to zero, then this routine will generate a
* cone.
*
* If the orientation is set to GLU.OUTSIDE (with glu.quadricOrientation), then
* any generated normals point away from the z axis. Otherwise, they point
* toward the z axis.
*
* If texturing is turned on (with glu.quadricTexture), then texture
* coordinates are generated so that t ranges linearly from 0.0 at z = 0 to
* 1.0 at z = height, and s ranges from 0.0 at the +y axis, to 0.25 at the +x
* axis, to 0.5 at the -y axis, to 0.75 at the -x axis, and back to 1.0 at the
* +y axis.
*
* @param baseRadius Specifies the radius of the cylinder at z = 0.
* @param topRadius Specifies the radius of the cylinder at z = height.
* @param height Specifies the height of the cylinder.
* @param slices Specifies the number of subdivisions around the z axis.
* @param stacks Specifies the number of subdivisions along the z axis.
*/
public void drawCylinder(final GL gl, final float baseRadius, final float topRadius, final float height, final int slices, final int stacks) {
float da, r, dr, dz;
float x, y, z, nz, nsign;
int i, j;
if (orientation == GLU.GLU_INSIDE) {
nsign = -1.0f;
} else {
nsign = 1.0f;
}
da = PI_2 / slices;
dr = (topRadius - baseRadius) / stacks;
dz = height / stacks;
nz = (baseRadius - topRadius) / height;
// Z component of normal vectors
if (drawStyle == GLU.GLU_POINT) {
glBegin(gl, GL.GL_POINTS);
for (i = 0; i < slices; i++) {
x = cos((i * da));
y = sin((i * da));
normal3f(gl, x * nsign, y * nsign, nz * nsign);
z = 0.0f;
r = baseRadius;
for (j = 0; j <= stacks; j++) {
glVertex3f(gl, (x * r), (y * r), z);
z += dz;
r += dr;
}
}
glEnd(gl);
} else if (drawStyle == GLU.GLU_LINE || drawStyle == GLU.GLU_SILHOUETTE) {
// Draw rings
if (drawStyle == GLU.GLU_LINE) {
z = 0.0f;
r = baseRadius;
for (j = 0; j <= stacks; j++) {
glBegin(gl, GL.GL_LINE_LOOP);
for (i = 0; i < slices; i++) {
x = cos((i * da));
y = sin((i * da));
normal3f(gl, x * nsign, y * nsign, nz * nsign);
glVertex3f(gl, (x * r), (y * r), z);
}
glEnd(gl);
z += dz;
r += dr;
}
} else {
// draw one ring at each end
if (baseRadius != 0.0) {
glBegin(gl, GL.GL_LINE_LOOP);
for (i = 0; i < slices; i++) {
x = cos((i * da));
y = sin((i * da));
normal3f(gl, x * nsign, y * nsign, nz * nsign);
glVertex3f(gl, (x * baseRadius), (y * baseRadius), 0.0f);
}
glEnd(gl);
glBegin(gl, GL.GL_LINE_LOOP);
for (i = 0; i < slices; i++) {
x = cos((i * da));
y = sin((i * da));
normal3f(gl, x * nsign, y * nsign, nz * nsign);
glVertex3f(gl, (x * topRadius), (y * topRadius), height);
}
glEnd(gl);
}
}
// draw length lines
glBegin(gl, GL.GL_LINES);
for (i = 0; i < slices; i++) {
x = cos((i * da));
y = sin((i * da));
normal3f(gl, x * nsign, y * nsign, nz * nsign);
glVertex3f(gl, (x * baseRadius), (y * baseRadius), 0.0f);
glVertex3f(gl, (x * topRadius), (y * topRadius), (height));
}
glEnd(gl);
} else if (drawStyle == GLU.GLU_FILL) {
final float ds = 1.0f / slices;
final float dt = 1.0f / stacks;
float t = 0.0f;
z = 0.0f;
r = baseRadius;
for (j = 0; j < stacks; j++) {
float s = 0.0f;
glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
for (i = 0; i <= slices; i++) {
if (i == slices) {
x = sin(0.0f);
y = cos(0.0f);
} else {
x = sin((i * da));
y = cos((i * da));
}
// if (nsign == 1.0f) {
normal3f(gl, (x * nsign), (y * nsign), (nz * nsign));
TXTR_COORD(gl, s, t);
glVertex3f(gl, (x * r), (y * r), z);
normal3f(gl, (x * nsign), (y * nsign), (nz * nsign));
TXTR_COORD(gl, s, t + dt);
glVertex3f(gl, (x * (r + dr)), (y * (r + dr)), (z + dz));
/* } else {
normal3f(gl, x * nsign, y * nsign, nz * nsign);
TXTR_COORD(gl, s, t);
glVertex3f(gl, (x * r), (y * r), z);
normal3f(gl, x * nsign, y * nsign, nz * nsign);
TXTR_COORD(gl, s, t + dt);
glVertex3f(gl, (x * (r + dr)), (y * (r + dr)), (z + dz));
} */
s += ds;
} // for slices
glEnd(gl);
r += dr;
t += dt;
z += dz;
} // for stacks
}
}
/**
* renders a disk on the z = 0 plane. The disk has a radius of
* outerRadius, and contains a concentric circular hole with a radius of
* innerRadius. If innerRadius is 0, then no hole is generated. The disk is
* subdivided around the z axis into slices (like pizza slices), and also
* about the z axis into rings (as specified by slices and loops,
* respectively).
*
* With respect to orientation, the +z side of the disk is considered to be
* "outside" (see glu.quadricOrientation). This means that if the orientation
* is set to GLU.OUTSIDE, then any normals generated point along the +z axis.
* Otherwise, they point along the -z axis.
*
* If texturing is turned on (with glu.quadricTexture), texture coordinates are
* generated linearly such that where r=outerRadius, the value at (r, 0, 0) is
* (1, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5), and at
* (0, -r, 0) it is (0.5, 0).
*/
public void drawDisk(final GL gl, final float innerRadius, final float outerRadius, final int slices, final int loops)
{
float da, dr;
/* Normal vectors */
if (normals != GLU.GLU_NONE) {
if (orientation == GLU.GLU_OUTSIDE) {
glNormal3f(gl, 0.0f, 0.0f, +1.0f);
}
else {
glNormal3f(gl, 0.0f, 0.0f, -1.0f);
}
}
da = PI_2 / slices;
dr = (outerRadius - innerRadius) / loops;
switch (drawStyle) {
case GLU.GLU_FILL:
{
/* texture of a gluDisk is a cut out of the texture unit square
* x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
* (linear mapping)
*/
final float dtc = 2.0f * outerRadius;
float sa, ca;
float r1 = innerRadius;
int l;
for (l = 0; l < loops; l++) {
final float r2 = r1 + dr;
if (orientation == GLU.GLU_OUTSIDE) {
int s;
glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
for (s = 0; s <= slices; s++) {
float a;
if (s == slices)
a = 0.0f;
else
a = s * da;
sa = sin(a);
ca = cos(a);
TXTR_COORD(gl, 0.5f + sa * r2 / dtc, 0.5f + ca * r2 / dtc);
glVertex2f(gl, r2 * sa, r2 * ca);
TXTR_COORD(gl, 0.5f + sa * r1 / dtc, 0.5f + ca * r1 / dtc);
glVertex2f(gl, r1 * sa, r1 * ca);
}
glEnd(gl);
}
else {
int s;
glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
for (s = slices; s >= 0; s--) {
float a;
if (s == slices)
a = 0.0f;
else
a = s * da;
sa = sin(a);
ca = cos(a);
TXTR_COORD(gl, 0.5f - sa * r2 / dtc, 0.5f + ca * r2 / dtc);
glVertex2f(gl, r2 * sa, r2 * ca);
TXTR_COORD(gl, 0.5f - sa * r1 / dtc, 0.5f + ca * r1 / dtc);
glVertex2f(gl, r1 * sa, r1 * ca);
}
glEnd(gl);
}
r1 = r2;
}
break;
}
case GLU.GLU_LINE:
{
int l, s;
/* draw loops */
for (l = 0; l <= loops; l++) {
final float r = innerRadius + l * dr;
glBegin(gl, GL.GL_LINE_LOOP);
for (s = 0; s < slices; s++) {
final float a = s * da;
glVertex2f(gl, r * sin(a), r * cos(a));
}
glEnd(gl);
}
/* draw spokes */
for (s = 0; s < slices; s++) {
final float a = s * da;
final float x = sin(a);
final float y = cos(a);
glBegin(gl, GL.GL_LINE_STRIP);
for (l = 0; l <= loops; l++) {
final float r = innerRadius + l * dr;
glVertex2f(gl, r * x, r * y);
}
glEnd(gl);
}
break;
}
case GLU.GLU_POINT:
{
int s;
glBegin(gl, GL.GL_POINTS);
for (s = 0; s < slices; s++) {
final float a = s * da;
final float x = sin(a);
final float y = cos(a);
int l;
for (l = 0; l <= loops; l++) {
final float r = innerRadius * l * dr;
glVertex2f(gl, r * x, r * y);
}
}
glEnd(gl);
break;
}
case GLU.GLU_SILHOUETTE:
{
if (innerRadius != 0.0) {
float a;
glBegin(gl, GL.GL_LINE_LOOP);
for (a = 0.0f; a < PI_2; a += da) {
final float x = innerRadius * sin(a);
final float y = innerRadius * cos(a);
glVertex2f(gl, x, y);
}
glEnd(gl);
}
{
float a;
glBegin(gl, GL.GL_LINE_LOOP);
for (a = 0; a < PI_2; a += da) {
final float x = outerRadius * sin(a);
final float y = outerRadius * cos(a);
glVertex2f(gl, x, y);
}
glEnd(gl);
}
break;
}
default:
return;
}
}
/**
* renders a partial disk on the z=0 plane. A partial disk is similar to a
* full disk, except that only the subset of the disk from startAngle
* through startAngle + sweepAngle is included (where 0 degrees is along
* the +y axis, 90 degrees along the +x axis, 180 along the -y axis, and
* 270 along the -x axis).
*
* The partial disk has a radius of outerRadius, and contains a concentric
* circular hole with a radius of innerRadius. If innerRadius is zero, then
* no hole is generated. The partial disk is subdivided around the z axis
* into slices (like pizza slices), and also about the z axis into rings
* (as specified by slices and loops, respectively).
*
* With respect to orientation, the +z side of the partial disk is
* considered to be outside (see gluQuadricOrientation). This means that if
* the orientation is set to GLU.GLU_OUTSIDE, then any normals generated point
* along the +z axis. Otherwise, they point along the -z axis.
*
* If texturing is turned on (with gluQuadricTexture), texture coordinates
* are generated linearly such that where r=outerRadius, the value at (r, 0, 0)
* is (1, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5),
* and at (0, -r, 0) it is (0.5, 0).
*/
public void drawPartialDisk(final GL gl,
final float innerRadius,
final float outerRadius,
int slices,
final int loops,
float startAngle,
float sweepAngle) {
int i, j;
final float[] sinCache = new float[CACHE_SIZE];
final float[] cosCache = new float[CACHE_SIZE];
float angle;
float sintemp, costemp;
float deltaRadius;
float radiusLow, radiusHigh;
float texLow = 0, texHigh = 0;
float angleOffset;
int slices2;
int finish;
if (slices >= CACHE_SIZE)
slices = CACHE_SIZE - 1;
if (slices < 2
|| loops < 1
|| outerRadius <= 0.0f
|| innerRadius < 0.0f
|| innerRadius > outerRadius) {
//gluQuadricError(qobj, GLU.GLU_INVALID_VALUE);
System.err.println("PartialDisk: GLU_INVALID_VALUE");
return;
}
if (sweepAngle < -360.0f)
sweepAngle = 360.0f;
if (sweepAngle > 360.0f)
sweepAngle = 360.0f;
if (sweepAngle < 0) {
startAngle += sweepAngle;
sweepAngle = -sweepAngle;
}
if (sweepAngle == 360.0f) {
slices2 = slices;
} else {
slices2 = slices + 1;
}
/* Compute length (needed for normal calculations) */
deltaRadius = outerRadius - innerRadius;
/* Cache is the vertex locations cache */
angleOffset = startAngle / 180.0f * PI;
for (i = 0; i <= slices; i++) {
angle = angleOffset + ((PI * sweepAngle) / 180.0f) * i / slices;
sinCache[i] = sin(angle);
cosCache[i] = cos(angle);
}
if (sweepAngle == 360.0f) {
sinCache[slices] = sinCache[0];
cosCache[slices] = cosCache[0];
}
switch (normals) {
case GLU.GLU_FLAT :
case GLU.GLU_SMOOTH :
if (orientation == GLU.GLU_OUTSIDE) {
glNormal3f(gl, 0.0f, 0.0f, 1.0f);
} else {
glNormal3f(gl, 0.0f, 0.0f, -1.0f);
}
break;
default :
case GLU.GLU_NONE :
break;
}
switch (drawStyle) {
case GLU.GLU_FILL :
if (innerRadius == .0f) {
finish = loops - 1;
/* Triangle strip for inner polygons */
glBegin(gl, GL.GL_TRIANGLE_FAN);
if (textureFlag) {
glTexCoord2f(gl, 0.5f, 0.5f);
}
glVertex3f(gl, 0.0f, 0.0f, 0.0f);
radiusLow = outerRadius - deltaRadius * ((float) (loops - 1) / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
}
if (orientation == GLU.GLU_OUTSIDE) {
for (i = slices; i >= 0; i--) {
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
}
} else {
for (i = 0; i <= slices; i++) {
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
}
}
glEnd(gl);
} else {
finish = loops;
}
for (j = 0; j < finish; j++) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
radiusHigh = outerRadius - deltaRadius * ((float) (j + 1) / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
texHigh = radiusHigh / outerRadius / 2;
}
glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
for (i = 0; i <= slices; i++) {
if (orientation == GLU.GLU_OUTSIDE) {
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
if (textureFlag) {
glTexCoord2f(gl, texHigh * sinCache[i] + 0.5f,
texHigh * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusHigh * sinCache[i],
radiusHigh * cosCache[i],
0.0f);
} else {
if (textureFlag) {
glTexCoord2f(gl, texHigh * sinCache[i] + 0.5f,
texHigh * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusHigh * sinCache[i],
radiusHigh * cosCache[i],
0.0f);
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
}
}
glEnd(gl);
}
break;
case GLU.GLU_POINT :
glBegin(gl, GL.GL_POINTS);
for (i = 0; i < slices2; i++) {
sintemp = sinCache[i];
costemp = cosCache[i];
for (j = 0; j <= loops; j++) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sintemp, radiusLow * costemp, 0.0f);
}
}
glEnd(gl);
break;
case GLU.GLU_LINE :
if (innerRadius == outerRadius) {
glBegin(gl, GL.GL_LINE_STRIP);
for (i = 0; i <= slices; i++) {
if (textureFlag) {
glTexCoord2f(gl, sinCache[i] / 2 + 0.5f, cosCache[i] / 2 + 0.5f);
}
glVertex3f(gl, innerRadius * sinCache[i], innerRadius * cosCache[i], 0.0f);
}
glEnd(gl);
break;
}
for (j = 0; j <= loops; j++) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
}
glBegin(gl, GL.GL_LINE_STRIP);
for (i = 0; i <= slices; i++) {
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
}
glEnd(gl);
}
for (i = 0; i < slices2; i++) {
sintemp = sinCache[i];
costemp = cosCache[i];
glBegin(gl, GL.GL_LINE_STRIP);
for (j = 0; j <= loops; j++) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
}
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sintemp, radiusLow * costemp, 0.0f);
}
glEnd(gl);
}
break;
case GLU.GLU_SILHOUETTE :
if (sweepAngle < 360.0f) {
for (i = 0; i <= slices; i += slices) {
sintemp = sinCache[i];
costemp = cosCache[i];
glBegin(gl, GL.GL_LINE_STRIP);
for (j = 0; j <= loops; j++) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sintemp, radiusLow * costemp, 0.0f);
}
glEnd(gl);
}
}
for (j = 0; j <= loops; j += loops) {
radiusLow = outerRadius - deltaRadius * ((float) j / loops);
if (textureFlag) {
texLow = radiusLow / outerRadius / 2;
}
glBegin(gl, GL.GL_LINE_STRIP);
for (i = 0; i <= slices; i++) {
if (textureFlag) {
glTexCoord2f(gl, texLow * sinCache[i] + 0.5f,
texLow * cosCache[i] + 0.5f);
}
glVertex3f(gl, radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
}
glEnd(gl);
if (innerRadius == outerRadius)
break;
}
break;
default :
break;
}
}
/**
* draws a sphere of the given radius centered around the origin.
* The sphere is subdivided around the z axis into slices and along the z axis
* into stacks (similar to lines of longitude and latitude).
*
* If the orientation is set to GLU.OUTSIDE (with glu.quadricOrientation), then
* any normals generated point away from the center of the sphere. Otherwise,
* they point toward the center of the sphere.
* If texturing is turned on (with glu.quadricTexture), then texture
* coordinates are generated so that t ranges from 0.0 at z=-radius to 1.0 at
* z=radius (t increases linearly along longitudinal lines), and s ranges from
* 0.0 at the +y axis, to 0.25 at the +x axis, to 0.5 at the -y axis, to 0.75
* at the -x axis, and back to 1.0 at the +y axis.
*/
public void drawSphere(final GL gl, final float radius, final int slices, final int stacks) {
// TODO
float rho, drho, theta, dtheta;
float x, y, z;
float s, t, ds, dt;
int i, j, imin, imax;
boolean normals;
float nsign;
normals = (this.normals != GLU.GLU_NONE);
if (orientation == GLU.GLU_INSIDE) {
nsign = -1.0f;
} else {
nsign = 1.0f;
}
drho = PI / stacks;
dtheta = PI_2 / slices;
if (drawStyle == GLU.GLU_FILL) {
if (!textureFlag) {
// draw +Z end as a triangle fan
glBegin(gl, GL.GL_TRIANGLE_FAN);
glNormal3f(gl, 0.0f, 0.0f, 1.0f);
glVertex3f(gl, 0.0f, 0.0f, nsign * radius);
for (j = 0; j <= slices; j++) {
theta = (j == slices) ? 0.0f : j * dtheta;
x = -sin(theta) * sin(drho);
y = cos(theta) * sin(drho);
z = nsign * cos(drho);
if (normals) {
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
}
glVertex3f(gl, x * radius, y * radius, z * radius);
}
glEnd(gl);
}
ds = 1.0f / slices;
dt = 1.0f / stacks;
t = 1.0f; // because loop now runs from 0
if (textureFlag) {
imin = 0;
imax = stacks;
} else {
imin = 1;
imax = stacks - 1;
}
// draw intermediate stacks as quad strips
for (i = imin; i < imax; i++) {
rho = i * drho;
glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
s = 0.0f;
for (j = 0; j <= slices; j++) {
theta = (j == slices) ? 0.0f : j * dtheta;
x = -sin(theta) * sin(rho);
y = cos(theta) * sin(rho);
z = nsign * cos(rho);
if (normals) {
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
}
TXTR_COORD(gl, s, t);
glVertex3f(gl, x * radius, y * radius, z * radius);
x = -sin(theta) * sin(rho + drho);
y = cos(theta) * sin(rho + drho);
z = nsign * cos(rho + drho);
if (normals) {
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
}
TXTR_COORD(gl, s, t - dt);
s += ds;
glVertex3f(gl, x * radius, y * radius, z * radius);
}
glEnd(gl);
t -= dt;
}
if (!textureFlag) {
// draw -Z end as a triangle fan
glBegin(gl, GL.GL_TRIANGLE_FAN);
glNormal3f(gl, 0.0f, 0.0f, -1.0f);
glVertex3f(gl, 0.0f, 0.0f, -radius * nsign);
rho = PI - drho;
s = 1.0f;
for (j = slices; j >= 0; j--) {
theta = (j == slices) ? 0.0f : j * dtheta;
x = -sin(theta) * sin(rho);
y = cos(theta) * sin(rho);
z = nsign * cos(rho);
if (normals)
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
s -= ds;
glVertex3f(gl, x * radius, y * radius, z * radius);
}
glEnd(gl);
}
} else if (
drawStyle == GLU.GLU_LINE
|| drawStyle == GLU.GLU_SILHOUETTE) {
// draw stack lines
for (i = 1;
i < stacks;
i++) { // stack line at i==stacks-1 was missing here
rho = i * drho;
glBegin(gl, GL.GL_LINE_LOOP);
for (j = 0; j < slices; j++) {
theta = j * dtheta;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
if (normals)
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
glVertex3f(gl, x * radius, y * radius, z * radius);
}
glEnd(gl);
}
// draw slice lines
for (j = 0; j < slices; j++) {
theta = j * dtheta;
glBegin(gl, GL.GL_LINE_STRIP);
for (i = 0; i <= stacks; i++) {
rho = i * drho;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
if (normals)
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
glVertex3f(gl, x * radius, y * radius, z * radius);
}
glEnd(gl);
}
} else if (drawStyle == GLU.GLU_POINT) {
// top and bottom-most points
glBegin(gl, GL.GL_POINTS);
if (normals)
glNormal3f(gl, 0.0f, 0.0f, nsign);
glVertex3f(gl, 0.0f, 0.0f, radius);
if (normals)
glNormal3f(gl, 0.0f, 0.0f, -nsign);
glVertex3f(gl, 0.0f, 0.0f, -radius);
// loop over stacks
for (i = 1; i < stacks - 1; i++) {
rho = i * drho;
for (j = 0; j < slices; j++) {
theta = j * dtheta;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
if (normals)
glNormal3f(gl, x * nsign, y * nsign, z * nsign);
glVertex3f(gl, x * radius, y * radius, z * radius);
}
}
glEnd(gl);
}
}
//----------------------------------------------------------------------
// Internals only below this point
//
private static final float PI = FloatUtil.PI;
private static final float PI_2 = 2f * PI;
private static final int CACHE_SIZE = 240;
private final void glBegin(final GL gl, final int mode) {
if(immModeSinkEnabled) {
immModeSink.glBegin(mode);
} else {
gl.getGL2().glBegin(mode);
}
}
private final void glEnd(final GL gl) {
if(immModeSinkEnabled) {
immModeSink.glEnd(gl, immModeSinkImmediate);
} else {
gl.getGL2().glEnd();
}
}
private final void glVertex2f(final GL gl, final float x, final float y) {
if(immModeSinkEnabled) {
immModeSink.glVertex2f(x, y);
} else {
gl.getGL2().glVertex2f(x, y);
}
}
private final void glVertex3f(final GL gl, final float x, final float y, final float z) {
if(immModeSinkEnabled) {
immModeSink.glVertex3f(x, y, z);
} else {
gl.getGL2().glVertex3f(x, y, z);
}
}
private final void glNormal3f_s(final GL gl, final float x, final float y, final float z) {
final short a=(short)(x*0xFFFF);
final short b=(short)(y*0xFFFF);
final short c=(short)(z*0xFFFF);
if(immModeSinkEnabled) {
immModeSink.glNormal3s(a, b, c);
} else {
gl.getGL2().glNormal3s(a, b, c);
}
}
private final void glNormal3f_b(final GL gl, final float x, final float y, final float z) {
final byte a=(byte)(x*0xFF);
final byte b=(byte)(y*0xFF);
final byte c=(byte)(z*0xFF);
if(immModeSinkEnabled) {
immModeSink.glNormal3b(a, b, c);
} else {
gl.getGL2().glNormal3b(a, b, c);
}
}
private final void glNormal3f(final GL gl, final float x, final float y, final float z) {
switch(normalType) {
case GL.GL_FLOAT:
if(immModeSinkEnabled) {
immModeSink.glNormal3f(x,y,z);
} else {
gl.getGL2().glNormal3f(x,y,z);
}
break;
case GL.GL_SHORT:
glNormal3f_s(gl, x, y, z);
break;
case GL.GL_BYTE:
glNormal3f_b(gl, x, y, z);
break;
}
}
private final void glTexCoord2f(final GL gl, final float x, final float y) {
if(immModeSinkEnabled) {
immModeSink.glTexCoord2f(x, y);
} else {
gl.getGL2().glTexCoord2f(x, y);
}
}
/**
* Call glNormal3f after scaling normal to unit length.
*
* @param x
* @param y
* @param z
*/
private void normal3f(final GL gl, float x, float y, float z) {
float mag;
mag = (float)Math.sqrt(x * x + y * y + z * z);
if (mag > 0.00001F) {
x /= mag;
y /= mag;
z /= mag;
}
glNormal3f(gl, x, y, z);
}
private final void TXTR_COORD(final GL gl, final float x, final float y) {
if (textureFlag) glTexCoord2f(gl, x,y);
}
private float sin(final float r) {
return (float)Math.sin(r);
}
private float cos(final float r) {
return (float)Math.cos(r);
}
}
