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Diffstat (limited to 'src/jogl/classes/jogamp/opengl')
| -rw-r--r-- | src/jogl/classes/jogamp/opengl/ProjectFloat.java | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/ProjectFloat.java b/src/jogl/classes/jogamp/opengl/ProjectFloat.java new file mode 100644 index 000000000..bce3f3cfc --- /dev/null +++ b/src/jogl/classes/jogamp/opengl/ProjectFloat.java @@ -0,0 +1,940 @@ +/* +** 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: 2009-03-13 22:20:29 -0700 (Fri, 13 Mar 2009) $ $Revision: 1867 $ +** $Header$ +*/ + +/* + * 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. + * Copyright (c) 2011 JogAmp Community. 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; + +import java.nio.Buffer; +import java.nio.FloatBuffer; +import java.nio.IntBuffer; + +import javax.media.opengl.fixedfunc.GLMatrixFunc; + +import com.jogamp.common.nio.Buffers; +import com.jogamp.opengl.FloatUtil; + +/** + * ProjectFloat.java + * <p> + * Created 11-jan-2004 + * </p> + * + * @author Erik Duijs + * @author Kenneth Russell + * @author Sven Gothel + */ +public class ProjectFloat { + public static final int getRequiredFloatBufferSize() { return 2*16+2*4+3*3; } + + // Note that we have cloned parts of the implementation in order to + // support incoming Buffers. The reason for this is to avoid loading + // non-direct buffer subclasses unnecessarily, because doing so can + // cause performance decreases on direct buffer operations, at least + // on the current HotSpot JVM. It would be nicer (and make the code + // simpler) to simply have the array-based entry points delegate to + // the versions taking Buffers by wrapping the arrays. + + // Array-based implementation + private final float[] matrix = new float[16]; + private final float[][] tempInvertMatrix = new float[4][4]; + + private final float[] in = new float[4]; + private final float[] out = new float[4]; + + // Buffer-based implementation + private FloatBuffer matrixBuf; + private FloatBuffer tempInvertMatrixBuf; + + private FloatBuffer inBuf; + private FloatBuffer outBuf; + + private FloatBuffer forwardBuf; + private FloatBuffer sideBuf; + private FloatBuffer upBuf; + + public ProjectFloat() { + this(false); + } + + public ProjectFloat(boolean useBackingArray) { + this(useBackingArray ? null : Buffers.newDirectByteBuffer(getRequiredFloatBufferSize() * Buffers.SIZEOF_FLOAT), + useBackingArray ? new float[getRequiredFloatBufferSize()] : null, + 0); + } + + /** + * @param floatBuffer source buffer, may be ByteBuffer (recommended) or FloatBuffer or <code>null</code>. + * If used, shall be ≥ {@link #getRequiredFloatBufferSize()} + floatOffset. + * Buffer's position is ignored and floatPos is being used. + * @param floatArray source float array or <code>null</code>. + * If used, size shall be ≥ {@link #getRequiredFloatBufferSize()} + floatOffset. + * @param floatOffset Offset for either of the given sources (buffer or array) + */ + public ProjectFloat(Buffer floatBuffer, float[] floatArray, int floatOffset) { + int floatPos = floatOffset; + int floatSize = 16; + matrixBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + tempInvertMatrixBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + floatSize = 4; + inBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + outBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + floatSize = 3; + forwardBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + sideBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + floatPos += floatSize; + upBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize); + } + + public void destroy() { + matrixBuf = null; + tempInvertMatrixBuf = null; + inBuf = null; + outBuf = null; + forwardBuf = null; + sideBuf = null; + upBuf = null; + } + + /** + * @param src + * @param srcOffset + * @param inverse + * @param inverseOffset + * @return + */ + public boolean gluInvertMatrixf(float[] src, int srcOffset, float[] inverse, int inverseOffset) { + int i, j, k, swap; + float t; + float[][] temp = tempInvertMatrix; + + for (i = 0; i < 4; i++) { + for (j = 0; j < 4; j++) { + temp[i][j] = src[i*4+j+srcOffset]; + } + } + FloatUtil.makeIdentityf(inverse, inverseOffset); + + for (i = 0; i < 4; i++) { + // + // Look for largest element in column + // + swap = i; + for (j = i + 1; j < 4; j++) { + if (Math.abs(temp[j][i]) > Math.abs(temp[i][i])) { + swap = j; + } + } + + if (swap != i) { + // + // Swap rows. + // + for (k = 0; k < 4; k++) { + t = temp[i][k]; + temp[i][k] = temp[swap][k]; + temp[swap][k] = t; + + t = inverse[i*4+k+inverseOffset]; + inverse[i*4+k+inverseOffset] = inverse[swap*4+k+inverseOffset]; + inverse[swap*4+k+inverseOffset] = t; + } + } + + if (temp[i][i] == 0) { + // + // No non-zero pivot. The matrix is singular, which shouldn't + // happen. This means the user gave us a bad matrix. + // + return false; + } + + t = temp[i][i]; + for (k = 0; k < 4; k++) { + temp[i][k] /= t; + inverse[i*4+k+inverseOffset] /= t; + } + for (j = 0; j < 4; j++) { + if (j != i) { + t = temp[j][i]; + for (k = 0; k < 4; k++) { + temp[j][k] -= temp[i][k] * t; + inverse[j*4+k+inverseOffset] -= inverse[i*4+k+inverseOffset]*t; + } + } + } + } + return true; + } + + /** + * @param src + * @param inverse + * + * @return + */ + public boolean gluInvertMatrixf(FloatBuffer src, FloatBuffer inverse) { + int i, j, k, swap; + float t; + + int srcPos = src.position(); + int invPos = inverse.position(); + + FloatBuffer temp = tempInvertMatrixBuf; + + for (i = 0; i < 4; i++) { + for (j = 0; j < 4; j++) { + temp.put(i*4+j, src.get(i*4+j + srcPos)); + } + } + FloatUtil.makeIdentityf(inverse); + + for (i = 0; i < 4; i++) { + // + // Look for largest element in column + // + swap = i; + for (j = i + 1; j < 4; j++) { + if (Math.abs(temp.get(j*4+i)) > Math.abs(temp.get(i*4+i))) { + swap = j; + } + } + + if (swap != i) { + // + // Swap rows. + // + for (k = 0; k < 4; k++) { + t = temp.get(i*4+k); + temp.put(i*4+k, temp.get(swap*4+k)); + temp.put(swap*4+k, t); + + t = inverse.get(i*4+k + invPos); + inverse.put(i*4+k + invPos, inverse.get(swap*4+k + invPos)); + inverse.put(swap*4+k + invPos, t); + } + } + + if (temp.get(i*4+i) == 0) { + // + // No non-zero pivot. The matrix is singular, which shouldn't + // happen. This means the user gave us a bad matrix. + // + return false; + } + + t = temp.get(i*4+i); + for (k = 0; k < 4; k++) { + temp.put(i*4+k, temp.get(i*4+k) / t); + inverse.put(i*4+k + invPos, inverse.get(i*4+k + invPos) / t); + } + for (j = 0; j < 4; j++) { + if (j != i) { + t = temp.get(j*4+i); + for (k = 0; k < 4; k++) { + temp.put(j*4+k, temp.get(j*4+k) - temp.get(i*4+k) * t); + inverse.put(j*4+k + invPos, inverse.get(j*4+k + invPos) - inverse.get(i*4+k + invPos) * t); + } + } + } + } + return true; + } + + + /** + * Method gluOrtho2D. + * + * @param left + * @param right + * @param bottom + * @param top + */ + public void gluOrtho2D(GLMatrixFunc gl, float left, float right, float bottom, float top) { + gl.glOrthof(left, right, bottom, top, -1, 1); + } + + /** + * Method gluPerspective. + * + * @param fovy + * @param aspect + * @param zNear + * @param zFar + */ + public void gluPerspective(GLMatrixFunc gl, float fovy, float aspect, float zNear, float zFar) { + float sine, cotangent, deltaZ; + float radians = fovy / 2 * (float) Math.PI / 180; + + deltaZ = zFar - zNear; + sine = (float) Math.sin(radians); + + if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) { + return; + } + + cotangent = (float) Math.cos(radians) / sine; + + FloatUtil.makeIdentityf(matrixBuf); + + matrixBuf.put(0 * 4 + 0, cotangent / aspect); + matrixBuf.put(1 * 4 + 1, cotangent); + matrixBuf.put(2 * 4 + 2, - (zFar + zNear) / deltaZ); + matrixBuf.put(2 * 4 + 3, -1); + matrixBuf.put(3 * 4 + 2, -2 * zNear * zFar / deltaZ); + matrixBuf.put(3 * 4 + 3, 0); + + gl.glMultMatrixf(matrixBuf); + } + + /** + * Method gluLookAt + * + * @param eyex + * @param eyey + * @param eyez + * @param centerx + * @param centery + * @param centerz + * @param upx + * @param upy + * @param upz + */ + public void gluLookAt(GLMatrixFunc gl, + float eyex, float eyey, float eyez, + float centerx, float centery, float centerz, + float upx, float upy, float upz) { + FloatBuffer forward = this.forwardBuf; + FloatBuffer side = this.sideBuf; + FloatBuffer up = this.upBuf; + + forward.put(0, centerx - eyex); + forward.put(1, centery - eyey); + forward.put(2, centerz - eyez); + + up.put(0, upx); + up.put(1, upy); + up.put(2, upz); + + FloatUtil.normalize(forward); + + /* Side = forward x up */ + FloatUtil.cross(forward, up, side); + FloatUtil.normalize(side); + + /* Recompute up as: up = side x forward */ + FloatUtil.cross(side, forward, up); + + FloatUtil.makeIdentityf(matrixBuf); + matrixBuf.put(0 * 4 + 0, side.get(0)); + matrixBuf.put(1 * 4 + 0, side.get(1)); + matrixBuf.put(2 * 4 + 0, side.get(2)); + + matrixBuf.put(0 * 4 + 1, up.get(0)); + matrixBuf.put(1 * 4 + 1, up.get(1)); + matrixBuf.put(2 * 4 + 1, up.get(2)); + + matrixBuf.put(0 * 4 + 2, -forward.get(0)); + matrixBuf.put(1 * 4 + 2, -forward.get(1)); + matrixBuf.put(2 * 4 + 2, -forward.get(2)); + + gl.glMultMatrixf(matrixBuf); + gl.glTranslatef(-eyex, -eyey, -eyez); + } + + /** + * Method gluProject + * + * @param objx + * @param objy + * @param objz + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param win_pos + * + * @return + */ + public boolean gluProject(float objx, float objy, float objz, + float[] modelMatrix, int modelMatrix_offset, + float[] projMatrix, int projMatrix_offset, + int[] viewport, int viewport_offset, + float[] win_pos, int win_pos_offset ) { + + float[] in = this.in; + float[] out = this.out; + + in[0] = objx; + in[1] = objy; + in[2] = objz; + in[3] = 1.0f; + + FloatUtil.multMatrixVecf(modelMatrix, modelMatrix_offset, in, 0, out); + FloatUtil.multMatrixVecf(projMatrix, projMatrix_offset, out, 0, in); + + if (in[3] == 0.0f) { + return false; + } + + in[3] = (1.0f / in[3]) * 0.5f; + + // Map x, y and z to range 0-1 + in[0] = in[0] * in[3] + 0.5f; + in[1] = in[1] * in[3] + 0.5f; + in[2] = in[2] * in[3] + 0.5f; + + // Map x,y to viewport + win_pos[0+win_pos_offset] = in[0] * viewport[2+viewport_offset] + viewport[0+viewport_offset]; + win_pos[1+win_pos_offset] = in[1] * viewport[3+viewport_offset] + viewport[1+viewport_offset]; + win_pos[2+win_pos_offset] = in[2]; + + return true; + } + + public boolean gluProject(float objx, float objy, float objz, + FloatBuffer modelMatrix, + FloatBuffer projMatrix, + int[] viewport, int viewport_offset, + float[] win_pos, int win_pos_offset ) { + + FloatBuffer in = this.inBuf; + FloatBuffer out = this.outBuf; + + in.put(0, objx); + in.put(1, objy); + in.put(2, objz); + in.put(3, 1.0f); + + FloatUtil.multMatrixVecf(modelMatrix, in, out); + FloatUtil.multMatrixVecf(projMatrix, out, in); + + if (in.get(3) == 0.0f) { + return false; + } + + in.put(3, (1.0f / in.get(3)) * 0.5f); + + // Map x, y and z to range 0-1 + in.put(0, in.get(0) * in.get(3) + 0.5f); + in.put(1, in.get(1) * in.get(3) + 0.5f); + in.put(2, in.get(2) * in.get(3) + 0.5f); + + // Map x,y to viewport + win_pos[0+win_pos_offset] = in.get(0) * viewport[2+viewport_offset] + viewport[0+viewport_offset]; + win_pos[1+win_pos_offset] = in.get(1) * viewport[3+viewport_offset] + viewport[1+viewport_offset]; + win_pos[2+win_pos_offset] = in.get(2); + + return true; + } + + /** + * Method gluProject + * + * @param objx + * @param objy + * @param objz + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param win_pos + * + * @return + */ + public boolean gluProject(float objx, float objy, float objz, + FloatBuffer modelMatrix, + FloatBuffer projMatrix, + IntBuffer viewport, + FloatBuffer win_pos) { + + FloatBuffer in = this.inBuf; + FloatBuffer out = this.outBuf; + + in.put(0, objx); + in.put(1, objy); + in.put(2, objz); + in.put(3, 1.0f); + + FloatUtil.multMatrixVecf(modelMatrix, in, out); + FloatUtil.multMatrixVecf(projMatrix, out, in); + + if (in.get(3) == 0.0f) { + return false; + } + + in.put(3, (1.0f / in.get(3)) * 0.5f); + + // Map x, y and z to range 0-1 + in.put(0, in.get(0) * in.get(3) + 0.5f); + in.put(1, in.get(1) * in.get(3) + 0.5f); + in.put(2, in.get(2) * in.get(3) + 0.5f); + + // Map x,y to viewport + int vPos = viewport.position(); + int wPos = win_pos.position(); + win_pos.put(0+wPos, in.get(0) * viewport.get(2+vPos) + viewport.get(0+vPos)); + win_pos.put(1+wPos, in.get(1) * viewport.get(3+vPos) + viewport.get(1+vPos)); + win_pos.put(2+wPos, in.get(2)); + + return true; + } + + + /** + * Method gluUnproject + * + * @param winx + * @param winy + * @param winz + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param obj_pos + * + * @return + */ + public boolean gluUnProject(float winx, float winy, float winz, + float[] modelMatrix, int modelMatrix_offset, + float[] projMatrix, int projMatrix_offset, + int[] viewport, int viewport_offset, + float[] obj_pos, int obj_pos_offset) { + float[] in = this.in; + float[] out = this.out; + + FloatUtil.multMatrixf(modelMatrix, modelMatrix_offset, projMatrix, projMatrix_offset, matrix, 0); + + if (!gluInvertMatrixf(matrix, 0, matrix, 0)) { + return false; + } + + in[0] = winx; + in[1] = winy; + in[2] = winz; + in[3] = 1.0f; + + // Map x and y from window coordinates + in[0] = (in[0] - viewport[0+viewport_offset]) / viewport[2+viewport_offset]; + in[1] = (in[1] - viewport[1+viewport_offset]) / viewport[3+viewport_offset]; + + // Map to range -1 to 1 + in[0] = in[0] * 2 - 1; + in[1] = in[1] * 2 - 1; + in[2] = in[2] * 2 - 1; + + FloatUtil.multMatrixVecf(matrix, in, out); + + if (out[3] == 0.0) { + return false; + } + + out[3] = 1.0f / out[3]; + + obj_pos[0+obj_pos_offset] = out[0] * out[3]; + obj_pos[1+obj_pos_offset] = out[1] * out[3]; + obj_pos[2+obj_pos_offset] = out[2] * out[3]; + + return true; + } + + + public boolean gluUnProject(float winx, float winy, float winz, + FloatBuffer modelMatrix, + FloatBuffer projMatrix, + int[] viewport, int viewport_offset, + float[] obj_pos, int obj_pos_offset) { + FloatBuffer in = this.inBuf; + FloatBuffer out = this.outBuf; + + FloatUtil.multMatrixf(modelMatrix, projMatrix, matrixBuf); + + if (!gluInvertMatrixf(matrixBuf, matrixBuf)) { + return false; + } + + in.put(0, winx); + in.put(1, winy); + in.put(2, winz); + in.put(3, 1.0f); + + // Map x and y from window coordinates + in.put(0, (in.get(0) - viewport[0+viewport_offset]) / viewport[2+viewport_offset]); + in.put(1, (in.get(1) - viewport[1+viewport_offset]) / viewport[3+viewport_offset]); + + // Map to range -1 to 1 + in.put(0, in.get(0) * 2 - 1); + in.put(1, in.get(1) * 2 - 1); + in.put(2, in.get(2) * 2 - 1); + + FloatUtil.multMatrixVecf(matrixBuf, in, out); + + if (out.get(3) == 0.0f) { + return false; + } + + out.put(3, 1.0f / out.get(3)); + + obj_pos[0+obj_pos_offset] = out.get(0) * out.get(3); + obj_pos[1+obj_pos_offset] = out.get(1) * out.get(3); + obj_pos[2+obj_pos_offset] = out.get(2) * out.get(3); + + return true; + } + + /** + * Method gluUnproject + * + * @param winx + * @param winy + * @param winz + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param obj_pos + * + * @return + */ + public boolean gluUnProject(float winx, float winy, float winz, + FloatBuffer modelMatrix, + FloatBuffer projMatrix, + IntBuffer viewport, + FloatBuffer obj_pos) { + FloatBuffer in = this.inBuf; + FloatBuffer out = this.outBuf; + + FloatUtil.multMatrixf(modelMatrix, projMatrix, matrixBuf); + + if (!gluInvertMatrixf(matrixBuf, matrixBuf)) { + return false; + } + + in.put(0, winx); + in.put(1, winy); + in.put(2, winz); + in.put(3, 1.0f); + + // Map x and y from window coordinates + int vPos = viewport.position(); + int oPos = obj_pos.position(); + in.put(0, (in.get(0) - viewport.get(0+vPos)) / viewport.get(2+vPos)); + in.put(1, (in.get(1) - viewport.get(1+vPos)) / viewport.get(3+vPos)); + + // Map to range -1 to 1 + in.put(0, in.get(0) * 2 - 1); + in.put(1, in.get(1) * 2 - 1); + in.put(2, in.get(2) * 2 - 1); + + FloatUtil.multMatrixVecf(matrixBuf, in, out); + + if (out.get(3) == 0.0f) { + return false; + } + + out.put(3, 1.0f / out.get(3)); + + obj_pos.put(0+oPos, out.get(0) * out.get(3)); + obj_pos.put(1+oPos, out.get(1) * out.get(3)); + obj_pos.put(2+oPos, out.get(2) * out.get(3)); + + return true; + } + + + /** + * Method gluUnproject4 + * + * @param winx + * @param winy + * @param winz + * @param clipw + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param near + * @param far + * @param obj_pos + * + * @return + */ + public boolean gluUnProject4(float winx, + float winy, + float winz, + float clipw, + float[] modelMatrix, + int modelMatrix_offset, + float[] projMatrix, + int projMatrix_offset, + int[] viewport, + int viewport_offset, + float near, + float far, + float[] obj_pos, + int obj_pos_offset ) { + float[] in = this.in; + float[] out = this.out; + + FloatUtil.multMatrixf(modelMatrix, modelMatrix_offset, projMatrix, projMatrix_offset, matrix, 0); + + if (!gluInvertMatrixf(matrix, 0, matrix, 0)) + return false; + + in[0] = winx; + in[1] = winy; + in[2] = winz; + in[3] = clipw; + + // Map x and y from window coordinates + in[0] = (in[0] - viewport[0+viewport_offset]) / viewport[2+viewport_offset]; + in[1] = (in[1] - viewport[1+viewport_offset]) / viewport[3+viewport_offset]; + in[2] = (in[2] - near) / (far - near); + + // Map to range -1 to 1 + in[0] = in[0] * 2 - 1; + in[1] = in[1] * 2 - 1; + in[2] = in[2] * 2 - 1; + + FloatUtil.multMatrixVecf(matrix, in, out); + + if (out[3] == 0.0f) + return false; + + obj_pos[0+obj_pos_offset] = out[0]; + obj_pos[1+obj_pos_offset] = out[1]; + obj_pos[2+obj_pos_offset] = out[2]; + obj_pos[3+obj_pos_offset] = out[3]; + return true; + } + + /** + * Method gluUnproject4 + * + * @param winx + * @param winy + * @param winz + * @param clipw + * @param modelMatrix + * @param projMatrix + * @param viewport + * @param near + * @param far + * @param obj_pos + * + * @return + */ + public boolean gluUnProject4(float winx, + float winy, + float winz, + float clipw, + FloatBuffer modelMatrix, + FloatBuffer projMatrix, + IntBuffer viewport, + float near, + float far, + FloatBuffer obj_pos) { + FloatBuffer in = this.inBuf; + FloatBuffer out = this.outBuf; + + FloatUtil.multMatrixf(modelMatrix, projMatrix, matrixBuf); + + if (!gluInvertMatrixf(matrixBuf, matrixBuf)) + return false; + + in.put(0, winx); + in.put(1, winy); + in.put(2, winz); + in.put(3, clipw); + + // Map x and y from window coordinates + int vPos = viewport.position(); + in.put(0, (in.get(0) - viewport.get(0+vPos)) / viewport.get(2+vPos)); + in.put(1, (in.get(1) - viewport.get(1+vPos)) / viewport.get(3+vPos)); + in.put(2, (in.get(2) - near) / (far - near)); + + // Map to range -1 to 1 + in.put(0, in.get(0) * 2 - 1); + in.put(1, in.get(1) * 2 - 1); + in.put(2, in.get(2) * 2 - 1); + + FloatUtil.multMatrixVecf(matrixBuf, in, out); + + if (out.get(3) == 0.0f) + return false; + + int oPos = obj_pos.position(); + obj_pos.put(0+oPos, out.get(0)); + obj_pos.put(1+oPos, out.get(1)); + obj_pos.put(2+oPos, out.get(2)); + obj_pos.put(3+oPos, out.get(3)); + return true; + } + + + /** + * Method gluPickMatrix + * + * @param x + * @param y + * @param deltaX + * @param deltaY + * @param viewport + */ + public void gluPickMatrix(GLMatrixFunc gl, + float x, + float y, + float deltaX, + float deltaY, + IntBuffer viewport) { + if (deltaX <= 0 || deltaY <= 0) { + return; + } + + /* Translate and scale the picked region to the entire window */ + int vPos = viewport.position(); + gl.glTranslatef((viewport.get(2+vPos) - 2 * (x - viewport.get(0+vPos))) / deltaX, + (viewport.get(3+vPos) - 2 * (y - viewport.get(1+vPos))) / deltaY, + 0); + gl.glScalef(viewport.get(2) / deltaX, viewport.get(3) / deltaY, 1.0f); + } + + /** + * Method gluPickMatrix + * + * @param x + * @param y + * @param deltaX + * @param deltaY + * @param viewport + * @param viewport_offset + */ + public void gluPickMatrix(GLMatrixFunc gl, + float x, + float y, + float deltaX, + float deltaY, + int[] viewport, + int viewport_offset) { + if (deltaX <= 0 || deltaY <= 0) { + return; + } + + /* Translate and scale the picked region to the entire window */ + gl.glTranslatef((viewport[2+viewport_offset] - 2 * (x - viewport[0+viewport_offset])) / deltaX, + (viewport[3+viewport_offset] - 2 * (y - viewport[1+viewport_offset])) / deltaY, + 0); + gl.glScalef(viewport[2+viewport_offset] / deltaX, viewport[3+viewport_offset] / deltaY, 1.0f); + } + +} |