| /* |
| ** 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. |
| ** |
| ** $Date: 2012/03/29 17:22:17 $ $Revision: 1.1.1.1 $ |
| */ |
| /* |
| ** $Header: /cvs/bao-parsec/pkgs/libs/mesa/src/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc,v 1.1.1.1 2012/03/29 17:22:17 uid42307 Exp $ |
| */ |
| |
| #include "gluos.h" |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <assert.h> |
| #include <GL/gl.h> |
| |
| #include "primitiveStream.h" |
| |
| Int primStream::num_triangles() |
| { |
| Int i; |
| Int ret=0; |
| for(i=0; i<index_lengths; i++) |
| { |
| ret += lengths[i]-2; |
| } |
| return ret; |
| } |
| |
| |
| |
| /*the begining of inserting a new primitive. |
| *reset counter to be 0. |
| */ |
| void primStream::begin() |
| { |
| counter = 0; |
| } |
| |
| void primStream::insert(Real u, Real v) |
| { |
| /*if the space cannot hold u and v, |
| *we have to expand the array |
| */ |
| if(index_vertices+1 >= size_vertices) { |
| Real* temp = (Real*) malloc (sizeof(Real) * (2*size_vertices + 2)); |
| assert(temp); |
| |
| /*copy*/ |
| for(Int i=0; i<index_vertices; i++) |
| temp[i] = vertices[i]; |
| |
| free(vertices); |
| vertices = temp; |
| size_vertices = 2*size_vertices + 2; |
| } |
| |
| vertices[index_vertices++] = u; |
| vertices[index_vertices++] = v; |
| counter++; |
| } |
| |
| /*the end of a primitive. |
| *increase index_lengths |
| */ |
| void primStream::end(Int type) |
| { |
| Int i; |
| /*if there is no vertex in this primitive, |
| *nothing needs to be done |
| */ |
| if(counter == 0) return ; |
| |
| if(index_lengths >= size_lengths){ |
| Int* temp = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2)); |
| assert(temp); |
| Int* tempTypes = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2)); |
| assert(tempTypes); |
| |
| /*copy*/ |
| for(i=0; i<index_lengths; i++){ |
| temp[i] = lengths[i]; |
| tempTypes[i] = types[i]; |
| } |
| |
| free(lengths); |
| free(types); |
| lengths = temp; |
| types = tempTypes; |
| size_lengths = 2*size_lengths + 2; |
| } |
| lengths[index_lengths] = counter; |
| types[index_lengths] = type; |
| index_lengths++; |
| } |
| |
| void primStream::print() |
| { |
| Int i,j,k; |
| printf("index_lengths=%i,size_lengths=%i\n", index_lengths, size_lengths); |
| printf("index_vertices=%i,size_vertices=%i\n", index_vertices, size_vertices); |
| k=0; |
| for(i=0; i<index_lengths; i++) |
| { |
| if(types[i] == PRIMITIVE_STREAM_FAN) |
| printf("primitive-FAN:\n"); |
| else |
| printf("primitive-STRIP:\n"); |
| for(j=0; j<lengths[i]; j++) |
| { |
| printf("(%f,%f) ", vertices[k], vertices[k+1]); |
| k += 2; |
| } |
| printf("\n"); |
| } |
| } |
| |
| primStream::primStream(Int sizeLengths, Int sizeVertices) |
| { |
| lengths = (Int*)malloc (sizeof(Int) * sizeLengths); |
| assert(lengths); |
| types = (Int*)malloc (sizeof(Int) * sizeLengths); |
| assert(types); |
| |
| vertices = (Real*) malloc(sizeof(Real) * sizeVertices); |
| assert(vertices); |
| |
| index_lengths = 0; |
| index_vertices = 0; |
| size_lengths = sizeLengths; |
| size_vertices = sizeVertices; |
| } |
| |
| primStream::~primStream() |
| { |
| free(lengths); |
| free(types); |
| free(vertices); |
| } |
| |
| void primStream::draw() |
| { |
| Int i,j,k; |
| k=0; |
| for(i=0; i<index_lengths; i++) |
| { |
| switch(types[i]){ |
| case PRIMITIVE_STREAM_FAN: |
| glBegin(GL_TRIANGLE_FAN); |
| break; |
| case PRIMITIVE_STREAM_STRIP: |
| glBegin(GL_TRIANGLE_STRIP); |
| break; |
| } |
| |
| for(j=0; j<lengths[i]; j++){ |
| glVertex2fv(vertices+k); |
| k += 2; |
| } |
| glEnd(); |
| } |
| } |
| |