来个果冻
jdfw.gif
至于调用，只要放一张
6.png
这样的小圆图，创建一个精灵-用
auto ac1 = CCLiquid::create(1, CCSizeMake(12,12), 3, 22);
pSprite->runAction(ac1);
看起来是不是有点像果冻，或者说点击果冻的时候
这个流体的术是什么，在我们点击的时候到底对这张图片做了什么操作
CCliquid这个函数的创建放在CCActionGrid3D这里，liquid的创建传入了四个参数
执行时间、切割细致程度，弹动次数，弹动幅度
void CCLiquid::update(float time)
{
int i, j;
for (i = 1; i < m_sGridSize.width; ++i)
{
for (j = 1; j < m_sGridSize.height; ++j)
{
ccVertex3F v = originalVertex(ccp(i, j));
v.x = (v.x + (sinf(time * (float)M_PI * m_nWaves * 2 + v.x * (1.0f - pow(time,4))*0.01) * m_fAmplitude * m_fAmplitudeRate));
v.y = (v.y + (sinf(time * (float)M_PI * m_nWaves * 2 + v.y * (1.0f - pow(time,4))*0.01) * m_fAmplitude * m_fAmplitudeRate));
setVertex(ccp(i, j), v);
}
}
}
这里你和cocos2d该文件下的原函数做对比可能也发现了
//原函数
v.x = (v.x + (sinf(time * (float)M_PI * _waves * 2 + v.x * .01f) * _amplitude * _amplitudeRate));
//不变原效果的小改造
v.x = (v.x + (sinf(time * (float)M_PI * m_nWaves * 2 + v.x * (1.0f - pow(time,4))*0.01) * m_fAmplitude * m_fAmplitudeRate));
yuan.png
这里多了一个 (1.0f - pow(time,4)) 这是因为原函数将一个图形的顶点进行拉伸后，到时间结束，状态并没有将它复原，动作完成这时候time=1.0f 带入原函数
v.x = v.x + sin(v.x0.01) 到结束的时候X轴还是多出了sin(0.01v.x)
因此我所加的 (1.0f - pow(time,4)) 作用便是在结束的时候把动画拉回来，同期修复的还有ccwave3d，CCRipple3D ，CCshake3d，CCwaves 好吧这算一个方法，当然，仅仅修改原本存在的小bug这算什么事，那我多唠两句吧！
用wave3d试试
我们让水波动起来
bowen.gif
D.imgp("illustrated/bg.png", 0, 0):anchor(ccp(0, 0)):to(self)
-- 水波纹1
local ripple1 = D.imgp("illustrated/ripple.png", 0, 0):anchor(ccp(0, 0)):to(self)
local waves3D = CCLiquid:create(8, CCSize(10, 10), 4, 10)
local RepeatForever = CCRepeatForever:create(waves3D)
ripple1:runAction(RepeatForever)
简单的Shader模仿
jdfw.gif
好吧，敢用Shader的前提是你所用的框架处理shader的垃圾回收处理做的不错，不会因为开一小会就卡的不行，这里我直接放源码,原理就是像素点的偏移
#ifdef GL_ES
precision mediump float;
#endif
//固定模式传入长宽,resolution即分辨率 CC_Texture0为自身像素 PosX,PosY为鼠标位置
//v_texCoord 图片全屏时候等于 vec2( gl_FragCoord.x/width, (1.-gl_FragCoord.y/height) );
uniform float width;
uniform float height;
uniform float PosX;
uniform float PosY;
#define resolution vec2(width,height)
uniform sampler2D CC_Texture0;
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
//uniform float time;
#define time CC_Time.x
const float PI = 3.1415926535897932;
const float speed = 0.2;
const float speed_x = 0.3;
const float speed_y = 0.3;
const float intensity = 3.0;
const int steps = 8;
const float frequency = 4.0;
const int angle = 7;
const float delta = 20.0;
const float intence = 400.0;
const float emboss = 0.3;
float col(vec2 coord)
{
float delta_theta = 2.0 * PI / float(angle);
float col = 0.0;
float theta = 0.0;
for (int i = 0; i < steps; i++)
{
vec2 adjc = coord;
theta = delta_theta * float(i);
adjc.x += cos(theta)*time*speed + time * speed_x;
adjc.y -= sin(theta)*time*speed - time * speed_y;
col = col + cos((adjc.x*cos(theta) - adjc.y*sin(theta))*frequency)*intensity;
}
return cos(col);
}
void main()
{
vec2 p = (gl_FragCoord.xy) / resolution.xy, c1 = p, c2 = p;
float cc1 = col(c1);
c2.x += resolution.x/delta;
float dx = emboss*(cc1-col(c2))/delta;
c2.x = p.x;
c2.y += resolution.y/delta;
float dy = emboss*(cc1-col(c2))/delta;
c1.x += dx;
c1.y += dy;
float alpha = 1.+dot(dx,dy)*intence;
gl_FragColor = v_fragmentColor*texture2D(CC_Texture0,vec2(c1.x,1.-c1.y))*(alpha*alpha);//*(alpha) *v_color*(alpha);
}
等等...发生了什么情况，我刚插了一张gif结果前面写的东西不见了...这是有长度限制？那就先到这里吧！--ByBBChangwei-16-04-04
