JS special effects
Other special effects
HTML5 canvas realizes 3D motion animation effect of geometric model
HTML5 canvas realizes 3D motion animation effect of geometric model
HTML5 canvas realizes 3D motion animation effect of geometric model
JS片段：
<script>
var {atan2,sqrt,sin,cos,PI,acos} = Math;
function project3D(x,y,z,vars){
x-=vars.camX,y-=vars.camY,z-=vars.camZ;
p=atan2(x,z),d=sqrt(z*z x*x),x=sin(p-vars.yaw)*d,z=cos(p-vars.yaw)*d;
p=atan2(y,z),d=sqrt(y*y z*z),y=sin(p-vars.pitch)*d,z=cos(p-vars.pitch)*d;
n=-9,b=1,l=9,d=1,e=0,f=0,g=x,h=z,k=(h-f)*(l-n)-(g-e)*(d-b),m=((g-e)*(b-f)-(h-f)*(n-e))/k;
return {x:vars.cx (n m*(l-n))*vars.scale,y:vars.cy y/z*vars.scale,d:sqrt(x*x y*y z*z)};
}
function elevation(x,y,z){
return acos(z / sqrt(x*x y*y z*z));
}
function subdivide(shape,subdivisions){
var t=shape.segs.length;
for(var i=0;i<t; i){
var x1=shape.segs[i].a.x;
var y1=shape.segs[i].a.y;
var z1=shape.segs[i].a.z;
var x2=(shape.segs[i].b.x-x1)/subdivisions;
var y2=(shape.segs[i].b.y-y1)/subdivisions;
var z2=(shape.segs[i].b.z-z1)/subdivisions;
shape.segs[i].b.x=x1 x2;
shape.segs[i].b.y=y1 y2;
shape.segs[i].b.z=z1 z2;
var x3=x2;
var y3=y2;
var z3=z2;
for(var k=0;k<subdivisions-1; k){
shape.segs.push(new Seg(x1 x2,y1 y2,z1 z2,x1 x2 x3,y1 y2 y3,z1 z2 z3));
x2 =x3;
y2 =y3;
z2 =z3;
}
}
}
这是一款很具空间感的基于html5 canvas实现的几何模型3D运动动画效果，好看的3D模型动画特效。
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