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456 lines
8.2 KiB
456 lines
8.2 KiB
package mightypork.rogue.render;
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import static org.lwjgl.opengl.GL11.*;
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import java.io.IOException;
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import mightypork.rogue.texture.TxQuad;
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import mightypork.utils.files.FileUtils;
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import mightypork.utils.logging.Log;
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import mightypork.utils.math.color.RGB;
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import mightypork.utils.math.coord.Coord;
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import mightypork.utils.math.coord.Rect;
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import org.newdawn.slick.opengl.SlickCallable;
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import org.newdawn.slick.opengl.Texture;
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import org.newdawn.slick.opengl.TextureImpl;
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import org.newdawn.slick.opengl.TextureLoader;
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import org.newdawn.slick.util.ResourceLoader;
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/**
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* Render utilities
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*
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* @author MightyPork
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*/
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public class Render {
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private static final Coord AXIS_X = new Coord(1, 0, 0);
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private static final Coord AXIS_Y = new Coord(0, 1, 0);
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private static final Coord AXIS_Z = new Coord(0, 0, 1);
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public static void init()
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{
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glDisable(GL_LIGHTING);
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glClearDepth(1f);
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LEQUAL);
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glEnable(GL_NORMALIZE);
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glShadeModel(GL_SMOOTH);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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/**
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* Bind GL color
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*
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* @param color RGB color
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*/
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public static void setColor(RGB color)
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{
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if (color != null) glColor4d(color.r, color.g, color.b, color.a);
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}
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/**
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* Bind GL color
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*
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* @param color RGB color
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* @param alpha alpha multiplier
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*/
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public static void setColor(RGB color, double alpha)
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{
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if (color != null) glColor4d(color.r, color.g, color.b, color.a * alpha);
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}
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/**
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* Translate with coord
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*
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* @param coord coord
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*/
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public static void translate(Coord coord)
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{
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glTranslated(coord.x, coord.y, coord.z);
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}
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/**
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* Scale
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*
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* @param factor vector of scaling factors
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*/
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public static void scale(Coord factor)
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{
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glScaled(factor.x, factor.y, factor.z);
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}
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/**
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* Scale by X factor
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*
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* @param factor scaling factor
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*/
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public static void scaleX(double factor)
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{
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glScaled(factor, 1, 1);
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}
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/**
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* Scale by Y factor
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*
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* @param factor scaling factor
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*/
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public static void scaleY(double factor)
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{
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glScaled(1, factor, 1);
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}
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/**
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* Scale by Z factor
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*
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* @param factor scaling factor
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*/
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public static void scaleZ(double factor)
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{
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glScaled(1, 1, factor);
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}
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/**
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* Rotate around X axis
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*
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* @param angle deg
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*/
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public static void rotateX(double angle)
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{
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rotate(angle, AXIS_X);
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}
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/**
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* Rotate around Y axis
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*
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* @param angle deg
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*/
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public static void rotateY(double angle)
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{
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rotate(angle, AXIS_Y);
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}
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/**
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* Rotate around Z axis
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*
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* @param angle deg
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*/
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public static void rotateZ(double angle)
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{
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rotate(angle, AXIS_Z);
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}
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/**
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* Rotate
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*
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* @param angle rotate angle
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* @param axis rotation axis
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*/
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public static void rotate(double angle, Coord axis)
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{
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Coord vec = axis.norm(1);
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glRotated(angle, vec.x, vec.y, vec.z);
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}
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/**
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* Store GL state
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*/
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public static void pushState()
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{
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SlickCallable.enterSafeBlock();
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}
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/**
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* Restore Gl state
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*/
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public static void popState()
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{
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SlickCallable.leaveSafeBlock();
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}
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/**
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* Load texture
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*
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* @param resourcePath
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* @return the loaded texture
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*/
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public synchronized static Texture loadTexture(String resourcePath)
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{
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try {
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String ext = FileUtils.getExtension(resourcePath).toUpperCase();
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Log.f3("Loading texture " + ext + " at " + resourcePath);
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Texture texture = TextureLoader.getTexture(ext, ResourceLoader.getResourceAsStream(resourcePath));
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if (texture == null) {
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Log.w("Texture " + resourcePath + " could not be loaded.");
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}
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return texture;
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} catch (IOException e) {
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Log.e("Loading of texture " + resourcePath + " failed.", e);
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throw new RuntimeException("Could not load texture " + resourcePath + ".", e);
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}
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}
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/**
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* Bind texture
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*
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* @param texture the texture
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* @param linear use linear interpolation for scaling
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* @throws RuntimeException if not loaded yet
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*/
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private static void bindTexture(Texture texture, boolean linear) throws RuntimeException
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{
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texture.bind();
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}
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/**
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* Bind texture with linear interpolation
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*
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* @param texture the texture
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* @throws RuntimeException if not loaded yet
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*/
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private static void bindTexture(Texture texture) throws RuntimeException
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{
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bindTexture(texture, false);
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}
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/**
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* Unbind all
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*/
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private static void unbindTexture()
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{
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if (TextureImpl.getLastBind() != null) {
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TextureImpl.bindNone();
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}
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}
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/**
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* Render quad 2D
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*
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* @param rect rectangle
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* @param color draw color
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*/
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public static void quad(Rect rect, RGB color)
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{
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setColor(color);
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quad(rect);
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}
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/**
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* Render quad
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*
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* @param quad the quad to draw (px)
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*/
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public static void quad(Rect quad)
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{
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double left = quad.xMin();
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double bottom = quad.yMin();
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double right = quad.xMax();
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double top = quad.yMax();
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// draw with color
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unbindTexture();
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// quad
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glBegin(GL_QUADS);
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glVertex2d(left, top);
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glVertex2d(right, top);
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glVertex2d(right, bottom);
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glVertex2d(left, bottom);
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glEnd();
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}
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/**
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* Render textured rect (texture must be binded already)
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*
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* @param quad rectangle (px)
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* @param uvs texture coords (0-1)
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*/
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public static void quadUV(Rect quad, Rect uvs)
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{
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glBegin(GL_QUADS);
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quadUV_nobound(quad, uvs);
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glEnd();
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}
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/**
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* Draw quad without glBegin and glEnd.
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*
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* @param quad rectangle (px)
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* @param uvs texture coords (0-1)
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*/
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public static void quadUV_nobound(Rect quad, Rect uvs)
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{
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double left = quad.xMin();
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double bottom = quad.yMin();
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double right = quad.xMax();
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double top = quad.yMax();
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double tleft = uvs.xMin();
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double tbottom = uvs.yMin();
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double tright = uvs.xMax();
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double ttop = uvs.yMax();
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// quad with texture
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glTexCoord2d(tleft, ttop);
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glVertex2d(left, top);
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glTexCoord2d(tright, ttop);
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glVertex2d(right, top);
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glTexCoord2d(tright, tbottom);
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glVertex2d(right, bottom);
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glTexCoord2d(tleft, tbottom);
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glVertex2d(left, bottom);
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}
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public static void quadGradH(Rect quad, RGB colorLeft, RGB colorRight)
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{
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double left = quad.xMin();
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double bottom = quad.yMin();
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double right = quad.yMax();
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double top = quad.yMax();
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// draw with color
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unbindTexture();
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glBegin(GL_QUADS);
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setColor(colorLeft);
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glVertex2d(left, top);
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setColor(colorRight);
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glVertex2d(right, top);
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setColor(colorRight);
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glVertex2d(right, bottom);
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setColor(colorLeft);
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glVertex2d(left, bottom);
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glEnd();
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}
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public static void quadGradV(Rect quad, RGB colorTop, RGB colorBottom)
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{
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double left = quad.xMin();
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double bottom = quad.yMin();
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double right = quad.yMax();
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double top = quad.yMax();
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// draw with color
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unbindTexture();
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glBegin(GL_QUADS);
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setColor(colorTop);
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glVertex2d(left, top);
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glVertex2d(right, top);
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setColor(colorBottom);
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glVertex2d(right, bottom);
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glVertex2d(left, bottom);
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glEnd();
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}
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/**
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* Render textured rect
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*
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* @param quad rectangle (px)
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* @param uvs texture coords rectangle (0-1)
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* @param texture texture instance
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* @param tint color tint
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*/
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public static void quadTextured(Rect quad, Rect uvs, Texture texture, RGB tint)
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{
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bindTexture(texture);
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setColor(tint);
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quadUV(quad, uvs);
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}
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/**
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* Render textured rect
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*
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* @param quad rectangle (px)
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* @param uvs texture coords rectangle (px)
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* @param texture texture instance
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*/
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public static void quadTextured(Rect quad, Rect uvs, Texture texture)
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{
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quadTextured(quad, uvs, texture, RGB.WHITE);
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}
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/**
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* Render textured rect
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*
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* @param quad rectangle (px)
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* @param texture texture instance
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*/
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public static void quadTextured(Rect quad, Texture texture)
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{
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quadTextured(quad, Rect.one(), texture, RGB.WHITE);
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}
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/**
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* Render textured rect
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*
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* @param quad rectangle (px)
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* @param txquad texture quad
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*/
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public static void quadTextured(Rect quad, TxQuad txquad)
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{
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quadTextured(quad, txquad, RGB.WHITE);
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}
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/**
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* Render textured rect
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*
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* @param quad rectangle (px)
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* @param txquad texture instance
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* @param tint color tint
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*/
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public static void quadTextured(Rect quad, TxQuad txquad, RGB tint)
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{
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quadTextured(quad, txquad.uvs, txquad.tx, tint);
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}
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}
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