Shader not working anymore?

[ustk]

@Christoph-Hart

Shader from the doc:

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    // Normalized pixel coordinates (from 0 to 1)
    vec2 uv = fragCoord/iResolution.xy;

    // Time varying pixel color
    vec3 col = 0.5 + 0.5*cos(iTime+uv.xyx+vec3(0,2,4));

    // Output to screen
    fragColor = vec4(col,1.0);
}

Interface:! ERROR: 0:0: '' : syntax error: #line{GLSL::Interface::bgShader2}
Interface:! ERROR: 0:1: '(' : syntax error: syntax error{GLSL::Interface::bgShader2}

Use Open GL is enabled

[Christoph Hart]

@ustk Where in the docs? It's using a wrong syntax, you need to define the main function without parameters:

void main()
{
    // Normalized pixel coordinates (from 0 to 1)
    vec2 uv = fragCoord/iResolution.xy;

    // Time varying pixel color
    vec3 col = 0.5 + 0.5*cos(iTime+uv.xyx+vec3(0,2,4));

    // Output to screen
    fragColor = pixelAlpha * vec4(col,1.0);
}

[ustk]

@Christoph-Hart Oh yes my bad, actually I'm using the good syntax inside the project but it does not work for me, neither does my previous shader despite it was working before...