59 lines
1.7 KiB
JavaScript
59 lines
1.7 KiB
JavaScript
const renderEngine = cc.renderer.renderEngine;
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const renderer = renderEngine.renderer;
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let ShaderMaterial = require('ShaderMaterial');
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const shader = {
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name: 'niuqu',
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params: [
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{ name: 'u_displacement', type: renderer.PARAM_TEXTURE_2D },
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{ name: 'u_magnitude', type: renderer.PARAM_FLOAT },//0-0.1
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{ name: 'u_strength', type: renderer.PARAM_FLOAT2 },//0-1
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{ name: 'time', type: renderer.PARAM_FLOAT },//0-1
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],
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start(material, params) {
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material.cusparmas = {}
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material.cusparmas._start = 0;
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material.setParamValue('u_magnitude', params.u_magnitude);
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material.setParamValue('u_strength', params.u_strength);
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material.setParamValue('u_displacement', params.u_displacement._texture);
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material.setParamValue('time', 0);
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},
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update(material, dt) {
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material.cusparmas._start+=dt
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material.setParamValue('time', material.cusparmas._start);
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},
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defines: [],
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frag: `
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uniform sampler2D texture;
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uniform vec4 color;
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varying vec2 uv0;
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varying vec2 uv1;
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varying vec2 uv2;
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varying vec2 uv3;
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uniform float time;
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uniform sampler2D u_displacement;
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uniform float u_magnitude;//波长
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uniform vec2 u_strength;//振幅
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void main() {
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vec2 disp = texture2D(u_displacement, uv0 + u_strength * time).xy;
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//disp的范围是0-1，这步操作让其变成-1 到 1 乘以 参数
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disp = ((disp * 2.0) - 1.0) * u_magnitude;
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//uv坐标偏移
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gl_FragColor = texture2D(texture, uv0 + disp)*vec4(0.9,0.9,1.0,0.5);
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}`,
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};
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ShaderMaterial.addShader(shader); |