Can anyone provide a sample code which demonstrates smooth shading on polygonal 3d objects.
I have my 3d object class which contains lists of polygon groups. each polygongroup have color and material properties, and list of Polygon objects. Polygon object contains list of vertices (represented by my Point3d class). It also has normal vector. So now this is how I draw object:
init method:
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| gl.glShadeModel(GL.GL_SMOOTH);
gl.glClearColor(0, 0, 0, 0);
gl.glClearDepth(1);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthFunc(GL.GL_LEQUAL);
gl.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
gl.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT, lightAmbient);
gl.glLightfv(GL.GL_LIGHT1, GL.GL_DIFFUSE, lightDiffuse);
gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, lightPosition);
gl.glEnable(GL.GL_LIGHT1);
gl.glColorMaterial(GL.GL_FRONT, GL.GL_DIFFUSE);
gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE); |
display method:
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| gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_COLOR_MATERIAL);
for (PolygonGroup polygonGroup : polygonGroups)
{
gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, polygonGroup.getDiffuseColor());
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, polygonGroup.getSpecularColor());
gl.glMaterialf(GL.GL_FRONT, GL.GL_SHININESS, polygonGroup.getShinines());
for (Iterator<Polygon> iter = polygonGroup.getPolygons().iterator(); iter.hasNext();)
{
float[] color = polygonGroup.getDiffuseColor();
Polygon polygon = iter.next();
gl.glBegin(GL.GL_POLYGON);
Vector3D n = Math3D.getNormal(polygon);
gl.glNormal3d(n.x, n.y, n.z);
gl.glColor4f(color[0], color[1], color[2], 1);
Point3D[] p = polygon.getPoints();
for (int i = 0; i < p.length; i++)
{
gl.glVertex3d(p[i].x, p[i].y, p[i].z);
}
gl.glEnd();
}
}
|
and after that my object looks like this:
what's wrong with this code
