/*******************************************************************************
 * Breakout Cave Survey Visualizer
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/
package org.andork.jogl.shadelet;

public class LinearColorBlendShadelet extends Shadelet {
	public LinearColorBlendShadelet() {
		setProperty("temp", "temp");
		setProperty("numColors", "numColors");
		setProperty("slopes", "slopes");
		setProperty("intercepts", "intercepts");
		setProperty("colors", "colors");
		setProperty("param", "param");
		setProperty("out", "gl_FragColor");
		setProperty("slopesDeclaration", "/* fragment */ uniform float $slopes[$numColors];");
		setProperty("interceptsDeclaration", "/* fragment */ uniform float $intercepts[$numColors];");
		setProperty("colorsDeclaration", "/* fragment */ uniform vec4 $colors[$numColors];");
		setProperty("tempDeclaration", "/* fragment */ float $temp;");
		setProperty("paramDeclaration", "varying float $param;");
	}

	public String colors() {
		return replaceProperties("$colors");
	}

	public LinearColorBlendShadelet colors(Object colors) {
		setProperty("colors", colors);
		return this;
	}

	public LinearColorBlendShadelet colorsDeclaration(Object colorsDeclaration) {
		setProperty("colorsDeclaration", colorsDeclaration);
		return this;
	}

	@Override
	public String getFragmentShaderMainCode() {
		return "  for (int $temp = 0; $temp < $numColors; $temp++) {" +
				"    $out += $colors[$temp] * clamp($slopes[$temp] * $param + $intercepts[$temp], 0.0, 1.0);" +
				"  }";
	}

	public String intercepts() {
		return replaceProperties("$intercepts");
	}

	public LinearColorBlendShadelet intercepts(Object intercepts) {
		setProperty("intercepts", intercepts);
		return this;
	}

	public LinearColorBlendShadelet interceptsDeclaration(String interceptsDeclaration) {
		setProperty("interceptsDeclaration", interceptsDeclaration);
		return this;
	}

	public LinearColorBlendShadelet out(String out) {
		setProperty("out", out);
		return this;
	}

	public LinearColorBlendShadelet outDeclaration(String outDeclaration) {
		setProperty("outDeclaration", outDeclaration);
		return this;
	}

	public LinearColorBlendShadelet param(Object param) {
		setProperty("param", param);
		return this;
	}

	public LinearColorBlendShadelet paramDeclaration(Object paramDeclaration) {
		setProperty("paramDeclaration", paramDeclaration);
		return this;
	}

	public String slopes() {
		return replaceProperties("$slopes");
	}

	public LinearColorBlendShadelet slopes(Object slopes) {
		setProperty("slopes", slopes);
		return this;
	}

	public LinearColorBlendShadelet slopesDeclaration(String slopesDeclaration) {
		setProperty("slopesDeclaration", slopesDeclaration);
		return this;
	}

	public LinearColorBlendShadelet temp(String temp) {
		setProperty("temp", temp);
		return this;
	}

	public LinearColorBlendShadelet tempDeclaration(String tempDeclaration) {
		setProperty("tempDeclaration", tempDeclaration);
		return this;
	}
}