"Windows' 미로" 프로젝트에서 가변 높이의 벽을 생성하기 위해 Java 레이 캐스팅 알고리즘을 수정하려면 어떻게 해야 합니까?

물론입니다. 높이 크기가 다른 Ray Casting 기사는 다음과 같습니다.

높이 크기가 다른 Ray Casting

문제

레이 캐스팅 알고리즘을 사용하여 "창문의 미로"를 만드는 Java 프로젝트가 있습니다. 스크린샷은 다음과 같습니다.

보시다시피 모든 벽의 높이 크기는 동일합니다. 저도 똑같이 하고 싶지만 높이 크기가 다릅니다

private void castRay(int xOnScreen,double angle,double direction) {
    R rx = castRayInX(angle,direction);
    R ry = castRayInY(angle,direction);
    // In case of out-of-space rays
    if (rx.getDistance()==Double.MAX_VALUE && ry.getDistance()==Double.MAX_VALUE) {
        graphics.setColor(BACKGROUND);
        graphics.drawLine(xOnScreen,0,xOnScreen,this.image.getHeight());
        return;
    }
    double distance = rx.getDistance();
    double normal = rx.getNormal();
    Color c = rx.getColor();
    double coef = Math.cos((angle+direction+Math.PI)-normal);
    Plot collision = rx.getPlot();

    if (ry.getDistance()<rx.getDistance()) {
        distance = ry.getDistance();
        normal = ry.getNormal();
        c = ry.getColor();
        coef = Math.cos((angle+direction+Math.PI)-normal);
        collision = ry.getPlot();
    }

    coef = Math.abs(coef);
    int factor = map.length*SQUARE_SIZE;
    double d = (double)(distance+factor)/factor;
    coef *= 1/(d*d);
    Color c2 = new Color((int)(c.getRed()*coef),(int)(c.getGreen()*coef),(int)(c.getBlue()*coef));
    graphics.setColor(c2);
//  graphics.setColor(c);  // no illumination
    distance *= Math.cos(angle); // lens correction
    int h = (int)(this.screenDistance/distance*WALL_HEIGHT); // perspective height
    int vh = this.image.getHeight();
    graphics.drawLine(xOnScreen,(vh-h)/2,xOnScreen,(vh+h)/2);
    drawEye(direction,collision);
}

private R castRayInX(double angleRay,double direction) {
    double angle = angleRay+direction;
    double x1 = eye.getX()+SQUARE_SIZE*Math.cos(angle);
    double y1 = eye.getY()+SQUARE_SIZE*Math.sin(angle);
    double slope = (y1-eye.getY())/(x1-eye.getX());
    if (Math.cos(angle)==0) {
        if (Math.sin(angle)>0)
            return new R(Double.MAX_VALUE,3*Math.PI/2,BACKGROUND,null);
        else
            return new R(Double.MAX_VALUE,Math.PI/2,BACKGROUND,null);
    }
    if (Math.cos(angle)>0) {
        int firstX = ((eye.getX()/SQUARE_SIZE)+1)*SQUARE_SIZE;
        R r = new R(Double.MAX_VALUE,angle+Math.PI,BACKGROUND,null);
        for (int x = firstX; x<map[0].length*SQUARE_SIZE; x += SQUARE_SIZE) {
            int y = (int)(slope*(x-eye.getX())+eye.getY());
            if (isOutside(x,y,Color.MAGENTA,this.showRayCastingX)) break;
            Color c = colorAt(x,y);
            if (c==null) c = colorAt(x,y-1);
            if (c==null) c = colorAt(x-1,y);
            if (c==null) c = colorAt(x-1,y-1);
            if (c!=null) {
                int DX = x-eye.getX();
                double DY = y-eye.getY();
                return new R(Math.sqrt(DX*DX+DY*DY),Math.PI,c,new Plot((int)x,(int)y, WALL_HEIGHT));
            }
        }
        return r;
    } else {
        int firstX = ((eye.getX()/SQUARE_SIZE))*SQUARE_SIZE;
        R r = new R(Double.MAX_VALUE,angle+Math.PI,BACKGROUND,null);
        for (int x = firstX; x>=0; x -= SQUARE_SIZE) {
            int y = (int)(slope*(x-eye.getX())+eye.getY());
            if (isOutside(x,y,Color.MAGENTA,this.showRayCastingX)) break;
            Color c = colorAt(x,y);
            if (c==null) c = colorAt(x,y-1);
            if (c==null) c = colorAt(x-1,y);
            if (c==null) c = colorAt(x-1,y-1);
            if (c!=null) {
                int DX = x-eye.getX();
                double DY = y-eye.getY();
                return new R(Math.sqrt(DX*DX+DY*DY),0,c,new Plot((int)x,(int)y, WALL_HEIGHT));
            }
        }
        return r;           
    }
}
private R castRayInY(double angleRay,double direction) {
//  System.out.println("cast ray 2 Y "+angleRay+" "+direction);
    double angle = angleRay+direction;
    double x1 = eye.getX()+SQUARE_SIZE*Math.cos(angle);
    double y1 = eye.getY()+SQUARE_SIZE*Math.sin(angle);
//  System.out.println(eye+" "+x1+" "+y1);
    double slope = (y1-eye.getY())/(x1-eye.getX());
    if (Math.sin(angle)==0) {
        if (Math.cos(angle)>0)
            return new R(Double.MAX_VALUE,Math.PI,BACKGROUND,null);
        else
            return new R(Double.MAX_VALUE,0,BACKGROUND,null);
    }
    if (Math.sin(angle)>0) {
        int firstY = ((eye.getY()/SQUARE_SIZE)+1)*SQUARE_SIZE;
        R r = new R(Double.MAX_VALUE,angle+Math.PI,BACKGROUND,null);
        for (int y = firstY; y<map.length*SQUARE_SIZE; y += SQUARE_SIZE) {
            int x = (int)((y-eye.getY())/slope)+eye.getX();
            if (isOutside(x,y,Color.CYAN,this.showRayCastingY)) break;
            Color c = colorAt(x,y);
            if (c==null) c = colorAt(x,y-1);
            if (c==null) c = colorAt(x-1,y);
            if (c==null) c = colorAt(x-1,y-1);
            if (c!=null) {
                double DX = x-eye.getX();
                int DY = y-eye.getY();
                return new R(Math.sqrt(DX*DX+DY*DY),3*Math.PI/2,c,new Plot((int)x,(int)y, WALL_HEIGHT));
                }
            }
            return r;
        } else {
            int firstY = ((eye.getY()/SQUARE_SIZE))*SQUARE_SIZE;
            R r = new R(Double.MAX_VALUE,angle+Math.PI,BACKGROUND,null);
            for (int y = firstY; y>=0; y -= SQUARE_SIZE) {
                int x = (int)((y-eye.getY())/slope)+eye.getX();
                if (isOutside(x,y,Color.CYAN,this.showRayCastingY)) break;
                Color c = colorAt(x,y);
                if (c==null) c = colorAt(x,y-1);
                if (c==null) c = colorAt(x-1,y);
                if (c==null) c = colorAt(x-1,y-1);
                if (c!=null) {
                    double DX = x-eye.getX();
                    int DY = y-eye.getY();
                    return new R(Math.sqrt(DX*DX+DY*DY),Math.PI/2,c,new Plot((int)x,(int)y, WALL_HEIGHT));
                }
            }
            return r;           
        }
    }

**Answer** In order to add variable height, do these:

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