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package com.sun.opengl.impl.nurbs;
/*
** 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.
*/
import javax.media.opengl.GL;
import javax.media.opengl.glu.GLU;
/**
* Class rendering surfaces with OpenGL
* @author Tomas Hrasky
*
*/
class OpenGLSurfaceEvaluator {
/**
* JOGL OpenGL object
*/
private GL gl;
/**
* Output triangles (callback)
*/
private boolean output_triangles;
/**
* Number of patch - used for distinguishing bezier plates forming NURBS surface with different colors
*/
private int poradi;
/**
* Creates new evaluator
*/
public OpenGLSurfaceEvaluator() {
gl = GLU.getCurrentGL();
}
/**
* Pushes eval bit
*/
public void bgnmap2f() {
if (output_triangles) {
// TODO outp triangles surfaceevaluator bgnmap2f
// System.out.println("TODO surfaceevaluator.bgnmap2f output triangles");
} else {
gl.glPushAttrib(GL.GL_EVAL_BIT);
// System.out.println("TODO surfaceevaluator.bgnmap2f glgetintegerv");
}
}
/**
* Sets glPolygonMode
* @param style polygon mode (N_MESHFILL/N_MESHLINE/N_MESHPOINT)
*/
public void polymode(int style) {
if (!output_triangles) {
switch (style) {
default:
case NurbsConsts.N_MESHFILL:
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
break;
case NurbsConsts.N_MESHLINE:
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE);
break;
case NurbsConsts.N_MESHPOINT:
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_POINT);
break;
}
}
}
/**
* Pops all attributes
*/
public void endmap2f() {
// TODO Auto-generated method stub
if (output_triangles) {
// System.out.println("TODO surfaceevaluator.endmap2f output triangles");
} else {
gl.glPopAttrib();
// TODO use LOD
}
}
/**
* Empty method
* @param ulo
* @param uhi
* @param vlo
* @param vhi
*/
public void domain2f(float ulo, float uhi, float vlo, float vhi) {
// DONE
}
/**
* Defines 2D mesh
* @param nu number of steps in u direction
* @param u0 lowest u
* @param u1 highest u
* @param nv number of steps in v direction
* @param v0 lowest v
* @param v1 highest v
*/
public void mapgrid2f(int nu, float u0, float u1, int nv, float v0, float v1) {
if (output_triangles) {
// System.out.println("TODO openglsurfaceavaluator.mapgrid2f output_triangles");
} else {
gl.glMapGrid2d(nu, u0, u1, nv, v0, v1);
}
}
/**
* Evaluates surface
* @param style surface style
* @param umin minimum U
* @param umax maximum U
* @param vmin minimum V
* @param vmax maximum V
*/
public void mapmesh2f(int style, int umin, int umax, int vmin, int vmax) {
if (output_triangles) {
// System.out.println("TODO openglsurfaceavaluator.mapmesh2f output_triangles");
} else {
/* //DEBUG - draw control points
this.poradi++;
if (poradi % 2 == 0)
gl.glColor3f(1, 0, 0);
else if (poradi % 2 == 1)
gl.glColor3f(0, 1, 0);
*/
switch (style) {
case NurbsConsts.N_MESHFILL:
gl.glEvalMesh2(GL.GL_FILL, umin, umax, vmin, vmax);
break;
case NurbsConsts.N_MESHLINE:
gl.glEvalMesh2(GL.GL_LINE, umin, umax, vmin, vmax);
break;
case NurbsConsts.N_MESHPOINT:
gl.glEvalMesh2(GL.GL_POINT, umin, umax, vmin, vmax);
break;
}
}
}
/**
* Initializes evaluator
* @param type surface type
* @param ulo lowest u
* @param uhi highest u
* @param ustride number of objects between control points in u direction
* @param uorder surface order in u direction
* @param vlo lowest v
* @param vhi highest v
* @param vstride number of control points' coords
* @param vorder surface order in v direction
* @param pts control points
*/
public void map2f(int type, float ulo, float uhi, int ustride, int uorder,
float vlo, float vhi, int vstride, int vorder, CArrayOfFloats pts) {
// TODO Auto-generated method stub
if (output_triangles) {
// System.out.println("TODO openglsurfaceevaluator.map2f output_triangles");
} else {
gl.glMap2f(type, ulo, uhi, ustride, uorder, vlo, vhi, vstride,
vorder, pts.getArray(), pts.getPointer());
}
}
/**
* Calls opengl enable
* @param type what to enable
*/
public void enable(int type) {
//DONE
gl.glEnable(type);
}
}
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