139 lines
No EOL
3.2 KiB
Java
139 lines
No EOL
3.2 KiB
Java
package ei.engine.scene;
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import java.awt.Rectangle;
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import org.lwjgl.opengl.GL11;
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import ei.engine.texture.Texture;
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import ei.engine.texture.TextureLoader;
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/**
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* Implementation of sprite that uses an OpenGL quad and a texture
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* to render a given image to the screen.
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*
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* @author Kevin Glass
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* @author Brian Matzon
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* @author Ziver Koc
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*/
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public class Sprite extends Entity {
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/** The texture that stores the image for this sprite */
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private Texture texture;
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/**
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* Create a new empty sprite
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*
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* @param window The window in which the sprite will be displayed
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* @param ref A reference to the image on which this sprite should be based
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*/
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public Sprite(String name) {
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super(name);
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texture = null;
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}
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/**
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* Create a new sprite from a specified texture.
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*
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* @param name The name of the sprite
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* @param texture The texture to use
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*/
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public Sprite(String name, Texture texture) {
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super(name);
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this.texture = texture;
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}
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/**
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* Create a new sprite from a specified image.
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*
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* @param name The name of the sprite
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* @param ref A reference to the image on which this sprite should be based
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*/
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public Sprite(String name, String ref) {
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super(name);
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this.texture = TextureLoader.getTextureLoaderInstance().getTexture(ref);
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}
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/**
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* Get the width of this sprite in pixels
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*
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* @return The width of this sprite in pixels
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*/
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public int getWidth() {
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if(texture == null){
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return 0;
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}
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return texture.getImageWidth();
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}
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/**
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* Get the height of this sprite in pixels
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*
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* @return The height of this sprite in pixels
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*/
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public int getHeight() {
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if(texture == null){
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return 0;
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}
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return texture.getImageHeight();
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}
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/**
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* Returns the texture
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* @return The texture
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*/
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public Texture getTexture(){
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return texture;
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}
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/**
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* Draw the sprite
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*/
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public void render() {
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if(texture != null){
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// store the current model matrix
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GL11.glPushMatrix();
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//Sets the location
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super.setTranslationGL();
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//the rotation
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super.setRotationGL(texture.getImageWidth()/2,texture.getImageHeight()/2);
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//Sets the scale of the sprite
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super.setScaleGL();
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// bind to the appropriate texture for this sprite
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texture.bindGL();
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// draw a quad textured to match the sprite
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GL11.glBegin(GL11.GL_QUADS);
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{
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//Vertex at the upper left
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GL11.glTexCoord2f(0, 0);
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GL11.glVertex2f(0, 0);
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//Vertex at the down left
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GL11.glTexCoord2f(0, texture.getHeight());
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GL11.glVertex2f(0, texture.getImageHeight());
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//Vertex at the upper right
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GL11.glTexCoord2f(texture.getWidth(), texture.getHeight());
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GL11.glVertex2f(texture.getImageWidth(),texture.getImageHeight());
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//Vertex at the down right
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GL11.glTexCoord2f(texture.getWidth(), 0);
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GL11.glVertex2f(texture.getImageWidth(),0);
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}
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GL11.glEnd();
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// restore the model view matrix to prevent contamination
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GL11.glPopMatrix();
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}
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}
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/**
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* Returns the bound of this class
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*/
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public Rectangle getBound() {
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return new Rectangle(
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(int)getLocation().getX(),
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(int)getLocation().getY(),
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texture.getImageWidth(),
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texture.getImageHeight());
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}
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} |