A way to load a dynamic picture on the Android loading interface

: (The box is displayed from left to right)

Photo resources:

Principle Introduction:

Step one: Put three pictures in position. The picture resource is displayed all at this time. (The aim is to stick to the correctness of the position)

Step two: Write shader. The discard is determined by the texture s coordinate, which is larger than a certain value. The value is 0 o'clock, all is not displayed, the value is 1 o'clock all display, the middle display of the segment is determined by the size worth.

Vertex shader:

Uniform mat4 umvpmatrix;attribute vec3 aposition;attribute vec2 atexcoor;varying vec2 vtexturecoord;void Main () {   GL _POSITION=UMVPMATRIX*VEC4 (aposition,1);   Vtexturecoord=atexcoor;}

Slice shader:

Precision Mediump float;varying vec2 vtexturecoord;uniform sampler2d stexture;uniform float uspan;void main () {   VEC4 Finalcolor=texture2d (Stexture,vtexturecoord);   if (vtexturecoord.x>uspan) {   finalcolor.a=0.0;   }   Gl_fragcolor=finalcolor;}

Note: The use of the method is very simple, there is no problem.

A way to load a dynamic picture on the Android loading interface