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Diffstat (limited to 'nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c')
| -rw-r--r-- | nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c | 379 |
1 files changed, 0 insertions, 379 deletions
diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c deleted file mode 100644 index fb65e0f17..000000000 --- a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c +++ /dev/null @@ -1,379 +0,0 @@ -/* $XFree86: xc/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c,v 1.2 2001/10/28 03:32:24 tsi Exp $ */ -/* -** 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 1.1 (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. -** -** 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. -** -*/ - -#include "gluos.h" -#include <math.h> -#include <GL/gl.h> -#include <GL/glu.h> -#include "gluint.h" - -/* -** Make m an identity matrix -*/ -static void __gluMakeIdentityd(GLdouble m[16]) -{ - m[0+4*0] = 1; m[0+4*1] = 0; m[0+4*2] = 0; m[0+4*3] = 0; - m[1+4*0] = 0; m[1+4*1] = 1; m[1+4*2] = 0; m[1+4*3] = 0; - m[2+4*0] = 0; m[2+4*1] = 0; m[2+4*2] = 1; m[2+4*3] = 0; - m[3+4*0] = 0; m[3+4*1] = 0; m[3+4*2] = 0; m[3+4*3] = 1; -} - -static void __gluMakeIdentityf(GLfloat m[16]) -{ - m[0+4*0] = 1; m[0+4*1] = 0; m[0+4*2] = 0; m[0+4*3] = 0; - m[1+4*0] = 0; m[1+4*1] = 1; m[1+4*2] = 0; m[1+4*3] = 0; - m[2+4*0] = 0; m[2+4*1] = 0; m[2+4*2] = 1; m[2+4*3] = 0; - m[3+4*0] = 0; m[3+4*1] = 0; m[3+4*2] = 0; m[3+4*3] = 1; -} - -void GLAPIENTRY -gluOrtho2D(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top) -{ - glOrtho(left, right, bottom, top, -1, 1); -} - -#define __glPi 3.14159265358979323846 - -void GLAPIENTRY -gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar) -{ - GLdouble m[4][4]; - double sine, cotangent, deltaZ; - double radians = fovy / 2 * __glPi / 180; - - deltaZ = zFar - zNear; - sine = sin(radians); - if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) { - return; - } - cotangent = COS(radians) / sine; - - __gluMakeIdentityd(&m[0][0]); - m[0][0] = cotangent / aspect; - m[1][1] = cotangent; - m[2][2] = -(zFar + zNear) / deltaZ; - m[2][3] = -1; - m[3][2] = -2 * zNear * zFar / deltaZ; - m[3][3] = 0; - glMultMatrixd(&m[0][0]); -} - -static void normalize(float v[3]) -{ - float r; - - r = sqrt( v[0]*v[0] + v[1]*v[1] + v[2]*v[2] ); - if (r == 0.0) return; - - v[0] /= r; - v[1] /= r; - v[2] /= r; -} - -static void cross(float v1[3], float v2[3], float result[3]) -{ - result[0] = v1[1]*v2[2] - v1[2]*v2[1]; - result[1] = v1[2]*v2[0] - v1[0]*v2[2]; - result[2] = v1[0]*v2[1] - v1[1]*v2[0]; -} - -void GLAPIENTRY -gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez, GLdouble centerx, - GLdouble centery, GLdouble centerz, GLdouble upx, GLdouble upy, - GLdouble upz) -{ - float forward[3], side[3], up[3]; - GLfloat m[4][4]; - - forward[0] = centerx - eyex; - forward[1] = centery - eyey; - forward[2] = centerz - eyez; - - up[0] = upx; - up[1] = upy; - up[2] = upz; - - normalize(forward); - - /* Side = forward x up */ - cross(forward, up, side); - normalize(side); - - /* Recompute up as: up = side x forward */ - cross(side, forward, up); - - __gluMakeIdentityf(&m[0][0]); - m[0][0] = side[0]; - m[1][0] = side[1]; - m[2][0] = side[2]; - - m[0][1] = up[0]; - m[1][1] = up[1]; - m[2][1] = up[2]; - - m[0][2] = -forward[0]; - m[1][2] = -forward[1]; - m[2][2] = -forward[2]; - - glMultMatrixf(&m[0][0]); - glTranslated(-eyex, -eyey, -eyez); -} - -static void __gluMultMatrixVecd(const GLdouble matrix[16], const GLdouble in[4], - GLdouble out[4]) -{ - int i; - - for (i=0; i<4; i++) { - out[i] = - in[0] * matrix[0*4+i] + - in[1] * matrix[1*4+i] + - in[2] * matrix[2*4+i] + - in[3] * matrix[3*4+i]; - } -} - -/* -** inverse = invert(src) -*/ -static int __gluInvertMatrixd(const GLdouble src[16], GLdouble inverse[16]) -{ - int i, j, k, swap; - double t; - GLdouble temp[4][4]; - - for (i=0; i<4; i++) { - for (j=0; j<4; j++) { - temp[i][j] = src[i*4+j]; - } - } - __gluMakeIdentityd(inverse); - - for (i = 0; i < 4; i++) { - /* - ** Look for largest element in column - */ - swap = i; - for (j = i + 1; j < 4; j++) { - if (fabs(temp[j][i]) > fabs(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]; - inverse[i*4+k] = inverse[swap*4+k]; - inverse[swap*4+k] = 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 GL_FALSE; - } - - t = temp[i][i]; - for (k = 0; k < 4; k++) { - temp[i][k] /= t; - inverse[i*4+k] /= 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] -= inverse[i*4+k]*t; - } - } - } - } - return GL_TRUE; -} - -static void __gluMultMatricesd(const GLdouble a[16], const GLdouble b[16], - GLdouble r[16]) -{ - int i, j; - - for (i = 0; i < 4; i++) { - for (j = 0; j < 4; j++) { - r[i*4+j] = - a[i*4+0]*b[0*4+j] + - a[i*4+1]*b[1*4+j] + - a[i*4+2]*b[2*4+j] + - a[i*4+3]*b[3*4+j]; - } - } -} - -GLint GLAPIENTRY -gluProject(GLdouble objx, GLdouble objy, GLdouble objz, - const GLdouble modelMatrix[16], - const GLdouble projMatrix[16], - const GLint viewport[4], - GLdouble *winx, GLdouble *winy, GLdouble *winz) -{ - double in[4]; - double out[4]; - - in[0]=objx; - in[1]=objy; - in[2]=objz; - in[3]=1.0; - __gluMultMatrixVecd(modelMatrix, in, out); - __gluMultMatrixVecd(projMatrix, out, in); - if (in[3] == 0.0) return(GL_FALSE); - in[0] /= in[3]; - in[1] /= in[3]; - in[2] /= in[3]; - /* Map x, y and z to range 0-1 */ - in[0] = in[0] * 0.5 + 0.5; - in[1] = in[1] * 0.5 + 0.5; - in[2] = in[2] * 0.5 + 0.5; - - /* Map x,y to viewport */ - in[0] = in[0] * viewport[2] + viewport[0]; - in[1] = in[1] * viewport[3] + viewport[1]; - - *winx=in[0]; - *winy=in[1]; - *winz=in[2]; - return(GL_TRUE); -} - -GLint GLAPIENTRY -gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz, - const GLdouble modelMatrix[16], - const GLdouble projMatrix[16], - const GLint viewport[4], - GLdouble *objx, GLdouble *objy, GLdouble *objz) -{ - double finalMatrix[16]; - double in[4]; - double out[4]; - - __gluMultMatricesd(modelMatrix, projMatrix, finalMatrix); - if (!__gluInvertMatrixd(finalMatrix, finalMatrix)) return(GL_FALSE); - - in[0]=winx; - in[1]=winy; - in[2]=winz; - in[3]=1.0; - - /* Map x and y from window coordinates */ - in[0] = (in[0] - viewport[0]) / viewport[2]; - in[1] = (in[1] - viewport[1]) / viewport[3]; - - /* Map to range -1 to 1 */ - in[0] = in[0] * 2 - 1; - in[1] = in[1] * 2 - 1; - in[2] = in[2] * 2 - 1; - - __gluMultMatrixVecd(finalMatrix, in, out); - if (out[3] == 0.0) return(GL_FALSE); - out[0] /= out[3]; - out[1] /= out[3]; - out[2] /= out[3]; - *objx = out[0]; - *objy = out[1]; - *objz = out[2]; - return(GL_TRUE); -} - -GLint GLAPIENTRY -gluUnProject4(GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw, - const GLdouble modelMatrix[16], - const GLdouble projMatrix[16], - const GLint viewport[4], - GLclampd near, GLclampd far, - GLdouble *objx, GLdouble *objy, GLdouble *objz, - GLdouble *objw) -{ - double finalMatrix[16]; - double in[4]; - double out[4]; - - __gluMultMatricesd(modelMatrix, projMatrix, finalMatrix); - if (!__gluInvertMatrixd(finalMatrix, finalMatrix)) return(GL_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[2]; - in[1] = (in[1] - viewport[1]) / viewport[3]; - 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; - - __gluMultMatrixVecd(finalMatrix, in, out); - if (out[3] == 0.0) return(GL_FALSE); - *objx = out[0]; - *objy = out[1]; - *objz = out[2]; - *objw = out[3]; - return(GL_TRUE); -} - -void GLAPIENTRY -gluPickMatrix(GLdouble x, GLdouble y, GLdouble deltax, GLdouble deltay, - GLint viewport[4]) -{ - if (deltax <= 0 || deltay <= 0) { - return; - } - - /* Translate and scale the picked region to the entire window */ - glTranslatef((viewport[2] - 2 * (x - viewport[0])) / deltax, - (viewport[3] - 2 * (y - viewport[1])) / deltay, 0); - glScalef(viewport[2] / deltax, viewport[3] / deltay, 1.0); -} |