Jump to content
This forum will be closing down. Please move to the respective dedicated project forums.

uniforms are not updated on v4 rc3


GBear
 Share

Recommended Posts

hi..

following link is example
http://jsfiddle.net/gbear/n0kzcjyu/20/

i set mark of uniformsd
it has like following code
 

Quote

    uniforms.mark= {
        type: '2f',
        value: {
            x: 0.5,
            y: 0.5
        }
    };

but it look like not have  any value in fragmentshader. 
 

Quote


    var fragmentSrc = [
        "precision mediump float;",
        "uniform vec4      filterArea;",
        'varying vec2 vTextureCoord;',
        'uniform sampler2D uSampler;',
        "uniform float     time;",
        "uniform vec2      mark;",
        "const float max_dist = 0.2;",
        "void main() {",
        "vec2 start = vTextureCoord.xy;",
        "float dist = distance(start, mark);",        //Wrong  -------------
        "if(dist < max_dist) {",
        "   vec4 color1  =texture2D(uSampler, vTextureCoord);",
        "   vec4 color2 = vec4(1.0, 1.0, 0.0, 1.0);",
        "   gl_FragColor = mix(color1, color2, 0.5);",
        "} else {",
        "    gl_FragColor = vec4(1.0, 0.0,  0.0, 1.0);",
        "   vec4 color1  =texture2D(uSampler, vTextureCoord);",
        "   vec4 color2 = vec4(1.0, 0.0, 0.0, 1.0);",
        "   gl_FragColor = mix(color1, color2, 0.5);",
        "}",
        "}",
    ];
 

if change  'float dist = distance(start, makr)  to following code,  shader is good

Quote

vec2 end = vec(0.5, 0.5);

if float dist = distance(start, end)

 

can you tell me where is wrong?

Link to comment
Share on other sites

  • 3 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...