Send a OF type as uniform to the shader

beginners
#1

Hello forum,

I have a OF type variable declared and defined as follows:

rim_color = ofFloatColor(0.3f,0.3f,0.3f,1.0f);

Then i want to send the value to the shader as uniform. Should it be sent as array ?

I am not sure to use setUniform1fv(…) or not.

Any hint ?

Thanks

#2

you use ofvec4f;

rim_color = ofVec4f(.3,.3,.3,1.0);
shader.setUniform4fv("rim_color",&rim_color,1);
#3

Just get to know how the built-in uniform types can be used.

In the oF app:

rim_color = ofFloatColor(0.3f,0.3f,0.3f,1.0f);
shader.setUniform4f("rim_color", rim_color.r, rim_color.g, rim_color.b, rim_color.a);

then in the shader code have:

uniform vec4 rim_color;

You can address a vec4 in the fragment shader with .r .g .b .a as well as .x .y .z and .w.

vec3 just_rgb = rim_color.rgb;
float alpha = rim_color.a;
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