Java tutorial
/* * This file is part of the Illarion project. * * Copyright 2014 - Illarion e.V. * * Illarion is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Illarion 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. */ package org.illarion.engine.backend.gdx; import com.badlogic.gdx.Files; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.graphics.glutils.ShaderProgram; import com.badlogic.gdx.math.Vector2; import org.illarion.engine.graphic.Color; import org.illarion.engine.graphic.effects.TileLightEffect; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.annotation.Nonnull; /** * @author Martin Karing <nitram@illarion.org> */ public class GdxTileLightEffect implements TileLightEffect, GdxTextureEffect { @Nonnull private static final Logger LOGGER = LoggerFactory.getLogger(GdxTileLightEffect.class); /** * Uniform shader variable name for the top left light. */ @Nonnull private static final String UNIFORM_TOP_LEFT = "u_topLeft"; /** * Uniform shader variable name for the top right light. */ @Nonnull private static final String UNIFORM_TOP_RIGHT = "u_topRight"; /** * Uniform shader variable name for the bottom left light. */ @Nonnull private static final String UNIFORM_BOTTOM_LEFT = "u_bottomLeft"; /** * Uniform shader variable name for the bottom right light. */ @Nonnull private static final String UNIFORM_BOTTOM_RIGHT = "u_bottomRight"; /** * Uniform shader variable name for the top light. */ @Nonnull private static final String UNIFORM_TOP = "u_top"; /** * Uniform shader variable name for the bottom light. */ @Nonnull private static final String UNIFORM_BOTTOM = "u_bottom"; /** * Uniform shader variable name for the left light. */ @Nonnull private static final String UNIFORM_LEFT = "u_left"; /** * Uniform shader variable name for the right light. */ @Nonnull private static final String UNIFORM_RIGHT = "u_right"; /** * Uniform shader variable name for the center light. */ @Nonnull private static final String UNIFORM_CENTER = "u_center"; /** * Uniform shader variable name for the top left coordinates. */ @Nonnull private static final String UNIFORM_TOP_LEFT_COORDS = "u_topLeftCoords"; /** * Uniform shader variable name for the bottom right coordinates. */ @Nonnull private static final String UNIFORM_BOTTOM_RIGHT_COORDS = "u_bottomRightCoords"; /** * The pixel shader that is required for this effect. */ @Nonnull private final ShaderProgram shader; @Nonnull private final com.badlogic.gdx.graphics.Color topLeft; @Nonnull private final com.badlogic.gdx.graphics.Color topRight; @Nonnull private final com.badlogic.gdx.graphics.Color bottomLeft; @Nonnull private final com.badlogic.gdx.graphics.Color bottomRight; @Nonnull private final com.badlogic.gdx.graphics.Color top; @Nonnull private final com.badlogic.gdx.graphics.Color bottom; @Nonnull private final com.badlogic.gdx.graphics.Color left; @Nonnull private final com.badlogic.gdx.graphics.Color right; @Nonnull private final com.badlogic.gdx.graphics.Color center; private final Vector2 topLeftCoord; private final Vector2 bottomRightCoord; GdxTileLightEffect(@Nonnull Files files) { //noinspection SpellCheckingInspection shader = new ShaderProgram(files.internal("org/illarion/engine/backend/gdx/shaders/generic.vert"), files.internal("org/illarion/engine/backend/gdx/shaders/tileLight.frag")); if (!shader.isCompiled()) { LOGGER.error("Compiling shader failed: {}", shader.getLog()); } topLeft = new com.badlogic.gdx.graphics.Color(); topRight = new com.badlogic.gdx.graphics.Color(); bottomLeft = new com.badlogic.gdx.graphics.Color(); bottomRight = new com.badlogic.gdx.graphics.Color(); top = new com.badlogic.gdx.graphics.Color(); bottom = new com.badlogic.gdx.graphics.Color(); left = new com.badlogic.gdx.graphics.Color(); right = new com.badlogic.gdx.graphics.Color(); center = new com.badlogic.gdx.graphics.Color(); topLeftCoord = new Vector2(); bottomRightCoord = new Vector2(); } @Override public void setTopLeftColor(@Nonnull Color color) { GdxGraphics.transferColor(color, topLeft); } @Override public void setTopRightColor(@Nonnull Color color) { GdxGraphics.transferColor(color, topRight); } @Override public void setBottomLeftColor(@Nonnull Color color) { GdxGraphics.transferColor(color, bottomLeft); } @Override public void setBottomRightColor(@Nonnull Color color) { GdxGraphics.transferColor(color, bottomRight); } @Override public void setTopColor(@Nonnull Color color) { GdxGraphics.transferColor(color, top); } @Override public void setBottomColor(@Nonnull Color color) { GdxGraphics.transferColor(color, bottom); } @Override public void setLeftColor(@Nonnull Color color) { GdxGraphics.transferColor(color, left); } @Override public void setRightColor(@Nonnull Color color) { GdxGraphics.transferColor(color, right); } @Override public void setCenterColor(@Nonnull Color color) { GdxGraphics.transferColor(color, center); } @Override public void activateEffect(@Nonnull SpriteBatch batch) { if (shader.isCompiled()) { batch.setShader(shader); setUniform(shader, UNIFORM_TOP_LEFT, topLeft); setUniform(shader, UNIFORM_TOP_RIGHT, topRight); setUniform(shader, UNIFORM_BOTTOM_LEFT, bottomLeft); setUniform(shader, UNIFORM_BOTTOM_RIGHT, bottomRight); setUniform(shader, UNIFORM_TOP, top); setUniform(shader, UNIFORM_BOTTOM, bottom); setUniform(shader, UNIFORM_LEFT, left); setUniform(shader, UNIFORM_RIGHT, right); setUniform(shader, UNIFORM_CENTER, center); setUniform(shader, UNIFORM_TOP_LEFT_COORDS, topLeftCoord); setUniform(shader, UNIFORM_BOTTOM_RIGHT_COORDS, bottomRightCoord); } } private static void setUniform(@Nonnull ShaderProgram shader, @Nonnull String name, @Nonnull com.badlogic.gdx.graphics.Color color) { if (shader.hasUniform(name)) { shader.setUniformf(name, color); } } private static void setUniform(@Nonnull ShaderProgram shader, @Nonnull String name, @Nonnull Vector2 vector2) { if (shader.hasUniform(name)) { shader.setUniformf(name, vector2); } } @Override public void disableEffect(@Nonnull SpriteBatch batch) { batch.setShader(null); } @Override public void setTopLeftCoordinate(float x, float y) { topLeftCoord.set(x, y); } @Override public void setBottomRightCoordinate(float x, float y) { bottomRightCoord.set(x, y); } }