创建mascot capsule v3烟雾效果
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
html/uploadpic/2005-12/200512233180841.gif" width=176 onload=javascript:resizepic(this) border=0>
html/uploadpic/2005-12/200512233180315.gif" width=128 onload=javascript:resizepic(this) border=0>
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 aff.netrans 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 aff.netrans();
trans.setidentity();
effect.setshadingtype(effect3d.normal_shading);
effect.setsemitransparentenabled(true);
layout.setaff.netrans( 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[num_point_sprites-1].start();
}
public void update(){
trans.setidentity();
trans.mul(lookat);
}
public void draw(graphics3d g3d){
ticks++;
for(int i=0; i
}
}
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,
}
}
}
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