创建Mascot Capsule v3烟雾效果

王朝other·作者佚名  2006-01-10
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原文地址链接

这个例子演示了在不使用高级粒子引擎的情况下,如何创建烟雾效果。主要是使用一些透明纹理精灵(sPRite)来实现的。并让这些精灵向上移动,顺时针或逆时针旋转。这样用的好处为了使精灵始终正对这照相机。虽然这个例子是在Mascot Capsule v3实现的,不过同样的技术可以用于JSR-184中。

下载源代码

程序截图,用烟雾纹理来生成的烟雾效果

下面是smoke类的代码:

import com.mascotcapsule.micro3d.v3.*;

import java.util.*;

public class Smoke extends V3Object{

private FigureLayout layout;

private Effect3D effect;

private AffineTrans trans;

// The point sprite command used when rendering the smoke.

private final int COMMAND = Graphics3D.PRIMITVE_POINT_SPRITES

Graphics3D.PDATA_POINT_SPRITE_PARAMS_PER_CMD

Graphics3D.PATTR_BLEND_ADD

Graphics3D.PATTR_COLORKEY;

// The number of sprites used.

private final int NUM_POINT_SPRITES = 10;

private SmokeItem []smokeItem = new SmokeItem[NUM_POINT_SPRITES];

// randomize the sprite rotation.

private Random r;

// the smoke texture.

private Texture texture = null;

private long ticks = 0; // frame counter.

public Smoke(int w, int h){

try{

texture = new Texture("/res/smoke.bmp", true);

}catch(Exception e){

e.printStackTrace();

}

layout = new FigureLayout();

effect = new Effect3D();

trans = new AffineTrans();

trans.setIdentity();

effect.setShadingType(Effect3D.NORMAL_SHADING);

effect.setSemiTransparentEnabled(true);

layout.setAffineTrans( trans );

layout.setPerspective(1, 4096, 512);

layout.setCenter(w/2, h/2);

trans.mul(lookAt); // the lookAt is from the super class.

// Create the smoke sprites.

smokeItem[0] = new SmokeItem(null);

for(int i=1; i

smokeItem[i] = new SmokeItem(smokeItem[i-1]);

}

smokeItem[NUM_POINT_SPRITES-1].start();

}

public void update(){

trans.setIdentity();

trans.mul(lookAt);

}

public void draw(Graphics3D g3d){

ticks++;

for(int i=0; i

smokeItem[i].render(g3d);

}

}

private class SmokeItem{

// each item has a reference to the next item so it can

// be started after a certain time or in this case when the item // reaches a certain point.

private SmokeItem next = null;

private int [] POINT = { 0, 0, 0 }; // Position of the sprite

private int [] TEXTURE = {10, 10, 512, 0, 0, 128, 128,

Graphics3D.POINT_SPRITE_PERSPECTIVE};

private int ROT; // The rotation of the point sprite,

// this is randomized

// w0, h0, a0, x00, y00, x01, y01, f0,

// w1, h1, a1, x10, y10, x11, y11, f1, ...

private int []NORMAL = new int[] {4096};

private int []COLOR = new int[] {0x00};

private boolean started = false;

private Random r = new Random();

private int mod;

public SmokeItem(SmokeItem next){

this.next = next;

reset();

}

public void start(){

started = true;

}

/*

* Reset the size and position of the sprite

*/

private void reset(){

TEXTURE[0] = 10;

TEXTURE[1] = 10;

POINT[1] = 0;

ROT = -16 + r.nextInt(32);

}

/*

* The sprite is scaled and moved before rendered to the screen.

*/

protected void render(Graphics3D g3d){

if(started && FPS.fps > 0){

mod = FPS.fps/5;

mod = mod <1?1:mod;

if(ticks%mod==0){

if(TEXTURE[0] < 80){

// make the size of the sprite bigger.

TEXTURE[0]++;

TEXTURE[1]++;

}

}

mod = FPS.fps/10;

mod = mod <1?1:mod;

if(ticks%mod==0){

POINT[1] ++; // add 1 to the y position.

if(POINT[1] == 180){

reset(); // start over.

}

if(POINT[1] > 18 && next != null){

next.start(); // start moving the next sprite

}

}

TEXTURE[2] += ROT;

}

// render the sprite.

g3d.renderPrimitives(texture, 0, 0, layout, effect, COMMAND,

1, POINT, NORMAL, TEXTURE, COLOR);

}

}

}

(出处:http://www.knowsky.com)

 
 
 
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