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//
// NSOpenGLContext+DrawingExtensions.m
// TheBigRedButton
//
// Created by Uli Kusterer on 02.09.07.
// Copyright 2007 M. Uli Kusterer.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
#import "NSOpenGLContext+DrawingExtensions.h"
#import <OpenGL/gl.h>
@implementation NSOpenGLContext (UKDrawingExtensions)
-(void) fillQuad: (UK3DQuad)quad
{
glBegin(GL_QUADS); // 01 11 10 00
glTexCoord2f(0.0f, 0.0f);
glVertex3f( quad.a.x, quad.a.y, quad.a.z );
glTexCoord2f( quad.b.x -quad.a.x, 0.0f);
glVertex3f( quad.b.x, quad.b.y, quad.b.z );
glTexCoord2f( quad.b.x -quad.a.x, quad.a.y -quad.c.y);
glVertex3f( quad.c.x, quad.c.y, quad.c.z );
glTexCoord2f(0.0f, quad.a.y -quad.c.y);
glVertex3f( quad.d.x, quad.d.y, quad.d.z );
glEnd();
}
-(void) fillQuadReflection: (UK3DQuad)quad
{
GLfloat height = quad.a.y -quad.c.y,
halfHeight = height / 2;
glBegin(GL_QUADS); // 01 11 10 00
glColor4f( 1.0, 1.0, 1.0, 0.3 );
glTexCoord2f(0.0f, height);
glVertex3f( quad.a.x, quad.a.y -height, quad.a.z );
glTexCoord2f( quad.b.x -quad.a.x, height);
glVertex3f( quad.b.x, quad.b.y -height, quad.b.z );
glTexCoord2f( quad.b.x -quad.a.x, 0.0f);
glColor4f( 1.0, 1.0, 1.0, 0.0 );
glVertex3f( quad.c.x, quad.c.y -halfHeight, quad.c.z );
glTexCoord2f(0.0f, 0.0f);
glVertex3f( quad.d.x, quad.d.y -halfHeight, quad.d.z );
glColor4f( 1.0, 1.0, 1.0, 1.0 );
glEnd();
}
-(void) fillQuadShadow: (UK3DQuad)quad
{
GLfloat height = quad.a.y -quad.c.y,
halfHeight = height / 8,
quarterHeight = halfHeight / 2;
glBegin(GL_QUADS); // 01 11 10 00
glColor4f( 0, 0, 0, 0.05 );
glTexCoord2f(0.0f, 0.0f);
glVertex3f( quad.a.x, quad.a.y -height +(quarterHeight *3), quad.a.z );
glTexCoord2f( quad.b.x -quad.a.x, 0.0f);
glVertex3f( quad.b.x, quad.b.y -height +(quarterHeight *3), quad.b.z );
glColor4f( 0, 0, 0, 0.1 );
glTexCoord2f( quad.b.x -quad.a.x, height);
glVertex3f( quad.c.x, quad.c.y, quad.c.z );
glTexCoord2f(0.0f, height);
glVertex3f( quad.d.x, quad.d.y, quad.d.z );
glColor4f( 1.0, 1.0, 1.0, 1.0 );
glEnd();
}
@end
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