我目前正在尝试制作游戏（Java，lwjgl，OpenGL），这样我就可以基本了解自上而下的RPG游戏是如何工作的（即在学习过程中）。最近，我试图实现一个将鼠标悬停在玩家精灵上的健康栏，但是当我试图通过我的Draw类绘制它时，显示器变得混乱，除了玩家之外几乎所有东西都变成了黑色，而玩家精灵本身则变成了颜色。传递（在R，G，B中）到Draw方法。
源代码：
玩家等级
package GameObjects;
import Graphics.ImageLoader;
import java.awt.Rectangle;
import java.util.ArrayList;
import static org.lwjgl.opengl.GL11.glPopMatrix;
import static org.lwjgl.opengl.GL11.glPushMatrix;
import org.newdawn.slick.opengl.Texture;
import rpgmain.*;
/**
*
* @author Samsung
*/
public class Player extends GameObject{
private float velX, velY;
private int curHealth, maxHealth;
private Texture tex;
public Player(float x, float y, ObjectId id) {
super(x, y, id);
velX = velY = 0;
curHealth = maxHealth = 100;
tex = ImageLoader.loadTexture("Player", "png");
}
protected void update(ArrayList<GameObject> objects) {
x += velX;
y += velY;
Collisions(objects);
}
protected void render() {
Draw.rect(x, y, 32, 32, tex);
dispHealth();
}
public void Collisions(ArrayList<GameObject> objects) {
for(GameObject obj : objects) {
if(obj.getId() == ObjectId.WaterTile) {
if(Collision.checkCollision(getBoundsTop(), obj.getBounds())) {
velX = velY = 0;
y = obj.getY() - 32;
}
if(Collision.checkCollision(getBoundsBottom(), obj.getBounds())) {
velX = velY = 0;
y = obj.getY() + 32;
}
if(Collision.checkCollision(getBoundsLeft(), obj.getBounds())) {
velX = velY = 0;
x = obj.getX() + 32;
}
if(Collision.checkCollision(getBoundsRight(), obj.getBounds())) {
velX = velY = 0;
x = obj.getX() - 32;
}
}
}
}
public void dispHealth() {
Draw.rect(x, y + 34, 10, 5, 1F, 0F, 0F); //THIS CODE TINTS THE PLAYER RED
}
public void setVelX(float velX) {
this.velX = velX;
}
public void setVelY(float velY) {
this.velY = velY;
}
public Rectangle getBounds() {
return new Rectangle((int)x, (int) y, 32, 32);
}
public Rectangle getBoundsTop() {
return new Rectangle((int)x + 7, (int) y + 26, 16, 6);
}
public Rectangle getBoundsBottom() {
return new Rectangle((int)x + 7, (int) y, 16, 6);
}
public Rectangle getBoundsLeft() {
return new Rectangle((int)x + 4, (int) y, 1, 32);
}
public Rectangle getBoundsRight() {
return new Rectangle((int)x + 31, (int) y, 1, 32);
}
public Rectangle getBoundsCentre() {
return new Rectangle((int)x + 20, (int) y, 4, 32);
}
}
绘制课程
package rpgmain;
import static org.lwjgl.opengl.GL11.*;
import org.newdawn.slick.opengl.*;
/**
*
* @author Samsung
*/
public class Draw {
public static void rect(float x, float y, float width, float height, Texture tex) {
glTranslatef(x, y, 0);
//glColor3f(1F, 1F, 1F);
glClearColor(0.7f, 0.7f, 0.7f, 1.0f);
tex.bind();
glBegin(GL_QUADS); //Specifies to the program where the drawing code begins. just to keep stuff neat. GL_QUADS specifies the type of shape you're going to be drawing.
{
//PNG format for images
glTexCoord2f(0,1); glVertex2f(0, 0); //Specify the vertices. 0, 0 is on BOTTOM LEFT CORNER OF SCREEN.
glTexCoord2f(0,0); glVertex2f(0, height); //2f specifies the number of args we're taking(2) and the type (float)
glTexCoord2f(1,0); glVertex2f(width, height);
glTexCoord2f(1,1); glVertex2f(width, 0);
}
glEnd();
}
public static void rect(float x, float y, float width, float height, Texture tex, float r, float g, float b) {
glTranslatef(x, y, 0);
glColor3f(r, g, b);
tex.bind();
glBegin(GL_QUADS); //Specifies to the program where the drawing code begins. just to keep stuff neat. GL_QUADS specifies the type of shape you're going to be drawing.
{
glTexCoord2f(0,0); glVertex2f(0, 0); //Specify the vertices. 0, 0 is on BOTTOM LEFT CORNER OF SCREEN.
glTexCoord2f(0,1); glVertex2f(0, height); //2f specifies the number of args we're taking(2) and the type (float)
glTexCoord2f(1,1); glVertex2f(width, height);
glTexCoord2f(1,0); glVertex2f(width, 0);
}
glEnd();
}
public static void rect(float x, float y, float width, float height, float r, float g, float b) {
glTranslatef(x, y, 0);
glColor3f(r, g, b); //Problem seems to be here
glBegin(GL_QUADS); //Specifies to the program where the drawing code begins. just to keep stuff neat. GL_QUADS specifies the type of shape you're going to be drawing.
{
glVertex2f(0, 0); //Specify the vertices. 0, 0 is on BOTTOM LEFT CORNER OF SCREEN.
glVertex2f(0, height); //2f specifies the number of args we're taking(2) and the type (float)
glVertex2f(width, height);
glVertex2f(width, 0);
}
glEnd();
}
}
我不知道是否也要包含其他类，但我想我也会包含GameObject类。
GameObject类
package rpgmain;
import java.awt.Rectangle;
import java.util.ArrayList;
/**
*
* @author Samsung
*/
public abstract class GameObject {
protected float x, y;
ObjectId id;
public GameObject(float x, float y, ObjectId id) {
this.x = x;
this.y = y;
this.id = id;
}
protected abstract void update(ArrayList<GameObject> objects);
protected abstract void render();
public abstract Rectangle getBounds();
public float getX() {
return x;
}
public void setX(float x) {
this.x = x;
}
public float getY() {
return y;
}
public void setY(float y) {
this.y = y;
}
public ObjectId getId() {
return id;
}
}
答案 0 :(得分：0)
我明白了。我的代码中存在两个主要问题，在Draw类中是ll。
变化：
public static void rect(float x, float y, float width, float height, Texture tex) {
glEnable(GL_TEXTURE_2D);
glTranslatef(x, y, 0);
glColor4f(1f, 1f, 1f, 1f); //NEEDS to be white before drawing, else stuff will tint.
tex.bind();
glBegin(GL_QUADS); //Specifies to the program where the drawing code begins. just to keep stuff neat. GL_QUADS specifies the type of shape you're going to be drawing.
{
//PNG format for images
glTexCoord2f(0,1); glVertex2f(0, 0); //Specify the vertices. 0, 0 is on BOTTOM LEFT CORNER OF SCREEN.
glTexCoord2f(0,0); glVertex2f(0, height); //2f specifies the number of args we're taking(2) and the type (float)
glTexCoord2f(1,0); glVertex2f(width, height);
glTexCoord2f(1,1); glVertex2f(width, 0);
}
glEnd();
glDisable(GL_TEXTURE_2D);
}