+++ /dev/null
-/*
-** 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 <stdlib.h>
-#include <stdio.h>
-#include <GL/gl.h>
-#include "zlassert.h"
-#include "gridWrap.h"
-
-
-/*******************grid structure****************************/
-void gridWrap::print()
-{
- printf("n_ulines = %i\n", n_ulines);
- printf("n_vlines = %i\n", n_vlines);
- printf("u_min=%f, umax=%f, vmin=%f, vmax=%f\n", u_min, u_max, v_min, v_max);
-}
-
-gridWrap::gridWrap(Int nUlines, Real* uvals,
- Int nVlines, Real* vvals)
-{
- assert(nUlines>=2);
- assert(nVlines>=2);
-
- is_uniform = 0;
- n_ulines = nUlines;
- n_vlines = nVlines;
- u_min = uvals[0];
- u_max = uvals[nUlines-1];
- v_min = vvals[0];
- v_max = vvals[nVlines-1];
- u_values = (Real*) malloc(sizeof(Real) * n_ulines);
- assert(u_values);
- v_values = (Real*) malloc(sizeof(Real) * n_vlines);
- assert(v_values);
-
- Int i;
- for(i=0; i<n_ulines; i++)
- u_values[i] = uvals[i];
- for(i=0; i<n_vlines; i++)
- v_values[i] = vvals[i];
-}
-
-gridWrap::gridWrap(Int nUlines, Int nVlines,
- Real uMin, Real uMax,
- Real vMin, Real vMax
- )
-{
- is_uniform = 1;
- n_ulines = nUlines;
- n_vlines = nVlines;
- u_min = uMin;
- u_max = uMax;
- v_min = vMin;
- v_max = vMax;
- u_values = (Real*) malloc(sizeof(Real) * n_ulines);
- assert(u_values);
- v_values = (Real*) malloc(sizeof(Real) * n_vlines);
- assert(v_values);
-
- Int i;
- assert(nUlines>=2);
- assert(nVlines>=2);
- Real du = (uMax-uMin)/(nUlines-1);
- Real dv = (vMax-vMin)/(nVlines-1);
-
- float tempu=uMin;
- u_values[0] = tempu;
- for(i=1; i<nUlines; i++)
- {
- tempu += du;
- u_values[i] = tempu;
- }
- u_values[nUlines-1] = uMax;
-
- float tempv=vMin;
- v_values[0] = tempv;
- for(i=1; i<nVlines; i++)
- {
- tempv += dv;
- v_values[i] = tempv;
- }
- v_values[nVlines-1] = vMax;
-}
-
-gridWrap::~gridWrap()
-{
- free(u_values);
- free(v_values);
-}
-
-void gridWrap::draw()
-{
- int i,j;
- glBegin(GL_POINTS);
- for(i=0; i<n_ulines; i++)
- for(j=0; j<n_vlines; j++)
- glVertex2f(get_u_value(i), get_v_value(j));
- glEnd();
-}
-
-void gridWrap::outputFanWithPoint(Int v, Int uleft, Int uright, Real vert[2], primStream* pStream)
-{
- Int i;
- if(uleft >= uright)
- return; //no triangles to output.
-
- pStream->begin();
- pStream->insert(vert);
-
- assert(vert[1] != v_values[v]); //don't output degenerate triangles
-
- if(vert[1] > v_values[v]) //vertex is above this grid line: notice the orientation
- {
- for(i=uleft; i<=uright; i++)
- pStream->insert(u_values[i], v_values[v]);
- }
- else //vertex is below the grid line
- {
- for(i=uright; i>= uleft; i--)
- pStream->insert(u_values[i], v_values[v]);
- }
-
- pStream->end(PRIMITIVE_STREAM_FAN);
-}
-
-
-
-/*each chain stores a number of consecutive
- *V-lines within a grid.
- *There is one grid vertex on each V-line.
- * The total number of V-lines is:
- * nVlines.
- * with respect to the grid, the index of the first V-line is
- * firstVlineIndex.
- * So with respect to the grid, the index of the ith V-line is
- * firstVlineIndex-i.
- * the grid-index of the uline at the ith vline (recall that each vline has one grid point)
- * is ulineIndices[i]. The u_value is cached in ulineValues[i], that is,
- * ulineValues[i] = grid->get_u_value(ulineIndices[i])
- */
-gridBoundaryChain::gridBoundaryChain(
- gridWrap* gr,
- Int first_vline_index,
- Int n_vlines,
- Int* uline_indices,
- Int* inner_indices
- )
-: grid(gr), firstVlineIndex(first_vline_index), nVlines(n_vlines)
-{
- ulineIndices = (Int*) malloc(sizeof(Int) * n_vlines);
- assert(ulineIndices);
-
- innerIndices = (Int*) malloc(sizeof(Int) * n_vlines);
- assert(innerIndices);
-
- vertices = (Real2*) malloc(sizeof(Real2) * n_vlines);
- assert(vertices);
-
-
-
- Int i;
- for(i=0; i<n_vlines; i++){
- ulineIndices[i] = uline_indices[i];
- innerIndices[i] = inner_indices[i];
- }
-
- for(i=0; i<n_vlines; i++){
- vertices[i][0] = gr->get_u_value(ulineIndices[i]);
- vertices[i][1] = gr->get_v_value(first_vline_index-i);
- }
-}
-
-void gridBoundaryChain::draw()
-{
- Int i;
- glBegin(GL_LINE_STRIP);
- for(i=0; i<nVlines; i++)
- {
- glVertex2fv(vertices[i]);
- }
- glEnd();
-}
-
-void gridBoundaryChain::drawInner()
-{
- Int i;
- for(i=1; i<nVlines; i++)
- {
- glBegin(GL_LINE_STRIP);
- glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i-1) );
- glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i) );
- glEnd();
- }
-}
-
-Int gridBoundaryChain::lookfor(Real v, Int i1, Int i2)
-{
- Int mid;
- while(i1 < i2-1)
- {
- mid = (i1+i2)/2;
- if(v > vertices[mid][1])
- {
- i2 = mid;
- }
- else
- i1 = mid;
- }
- return i1;
-}
-
-/*output the fan of the right end between grid line i-1 and grid line i*/
-void gridBoundaryChain::rightEndFan(Int i, primStream* pStream)
-{
- Int j;
- if(getUlineIndex(i) > getUlineIndex(i-1))
- {
- pStream->begin();
- pStream->insert(get_vertex(i-1));
- for(j=getUlineIndex(i-1); j<= getUlineIndex(i); j++)
- pStream->insert(grid->get_u_value(j), get_v_value(i));
- pStream->end(PRIMITIVE_STREAM_FAN);
- }
- else if(getUlineIndex(i) < getUlineIndex(i-1))
- {
- pStream->begin();
- pStream->insert(get_vertex(i));
- for(j=getUlineIndex(i-1); j>= getUlineIndex(i); j--)
- pStream->insert(grid->get_u_value(j), get_v_value(i-1));
- pStream->end(PRIMITIVE_STREAM_FAN);
- }
- //otherside, the two are equal, so there is no fan to output
-}
-
-
-/*output the fan of the left end between grid line i-1 and grid line i*/
-void gridBoundaryChain::leftEndFan(Int i, primStream* pStream)
-{
- Int j;
- if(getUlineIndex(i) < getUlineIndex(i-1))
- {
- pStream->begin();
- pStream->insert(get_vertex(i-1));
- for(j=getUlineIndex(i); j<= getUlineIndex(i-1); j++)
- pStream->insert(grid->get_u_value(j), get_v_value(i));
- pStream->end(PRIMITIVE_STREAM_FAN);
- }
- else if(getUlineIndex(i) > getUlineIndex(i-1))
- {
- pStream->begin();
- pStream->insert(get_vertex(i));
- for(j=getUlineIndex(i); j>= getUlineIndex(i-1); j--)
- pStream->insert(grid->get_u_value(j), get_v_value(i-1));
- pStream->end(PRIMITIVE_STREAM_FAN);
- }
- /*otherwisem, the two are equal, so there is no fan to outout*/
-}
projects / mesa.git / blobdiff