上下文:我将均匀的浮子阵列传递给我的片段着色器,然后从此数组中初始化一个带有值的浮子,最后尝试将此float添加到循环中,并以此代码:
var regl = createREGL()
var drawTriangle = regl({
vert: `
precision mediump float;
attribute vec2 position;
void main () {
gl_Position = vec4(position, 0, 1);
}
`,
frag: `
precision mediump float;
uniform float refPoints[3];
varying vec3 fcolor;
void main () {
float a_value = refPoints[1];
for(int i=0;i<3;++i) {
a_value += 1.; // <-- this line is causing the error
}
gl_FragColor = vec4(1, 1, 1, 1);
}
`,
attributes: {
position: [
[1, 0],
[0, 1],
[-1, -1]
],
},
uniforms : {
refPoints : [0., 1., 0., 2.]
},
count: 3
})
regl.frame(function () {
regl.clear({
color: [0, 0, 0, 1],
depth: 1
})
drawTriangle()
})
<script src="https://npmcdn.com/regl/dist/regl.js"></script>
我有一个奇怪的错误:
Error: (regl) bad data or missing for uniform "refPoints[0]". invalid type, expected number in command unknown
我不明白为什么这种特定循环中的增量会造成如此多的麻烦。你有什么想法吗?
afaict这是regl中的错误?如果您使用
,它有效 uniforms: {
"refPoints[0]": 0.,
"refPoints[1]": 1.,
"refPoints[2]": 0.,
}
var regl = createREGL()
var drawTriangle = regl({
vert: `
precision mediump float;
attribute vec2 position;
void main () {
gl_Position = vec4(position, 0, 1);
}
`,
frag: `
precision mediump float;
uniform float refPoints[3];
varying vec3 fcolor;
void main () {
float a_value = refPoints[1];
for(int i=0;i<3;++i) {
a_value += 1.; // <-- this line is causing the error
}
gl_FragColor = vec4(1, 1, 1, 1);
}
`,
attributes: {
position: [
[1, 0],
[0, 1],
[-1, -1]
],
},
uniforms : {
"refPoints[0]" : 0.,
"refPoints[1]" : 1.,
"refPoints[2]" : 0.,
},
count: 3
})
regl.frame(function () {
regl.clear({
color: [0, 0, 0, 1],
depth: 1
})
drawTriangle()
})
<script src="https://npmcdn.com/regl/dist/regl.js"></script>