What is wrong with this shader?

PrinzJuliano

I do have a working processing script but the shader that I want to use (Multiple Lights with just color) returns errors:

Cannot link Shader program: Vertex info: 0(45) error C7623: implicit narrowing of type vec4 to float

I have no idea how I can fix this as I do not understand the error in this program. Thanks for help!

Vertex Shader

#define PROCESSING_LIGHT_SHADER
#define NUM_LIGHTS 8

uniform mat4 modelview;
uniform mat4 transform;
uniform mat3 normalMatrix;

uniform int lightCount;
uniform vec4 lightPosition[8];

// focal factor for specular highlights (positive floats)
uniform vec4 AmbientContribution;

in vec4 vertex;//attribute same as "in"
in vec4 color;
in vec3 normal;

varying vec4 vertColor;

void main(){
     //Vertex normal direction

    float light;

    for (int i = 0; i < lightCount; i++){

        gl_Position = transform*vertex;
        vec3 vertexCamera = vec3(modelview * vertex);
        vec3 transformedNormal = normalize(normalMatrix * normal);
        light = 0.0f;

        vec3 dir = normalize(lightPosition[i].xyz - vertexCamera); //Vertex to light direction 
        float amountDiffuse = max(0.0, dot(dir, transformedNormal));
        // calculate the vertex position in eye coordinates
        vec3 vertexViewDir = normalize(-vertexCamera);

        // calculate the vector corresponding to the light source reflected in the vertex surface.
        // lightDir is negated as GLSL expects an incoming (rather than outgoing) vector
        vec3 lightReflection = reflect(-dir, transformedNormal);

        //color=clamp(color,0.0f,1.0f);

        // calculate actual light intensity
        light += AmbientContribution;
        light += 0.25 * amountDiffuse;


    }
    vertColor = vec4(light, light, light, 1) * color;
}

Fragment Shader

#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif

varying vec4 vertColor;

void main() {
  gl_FragColor = vertColor;
}

koogs

Line 44, you are adding a vec4 to a float

It's the glsl equivalent of trying to squeeze a float array into a single float.

Don't know a fix, not enough context...

PrinzJuliano

I start to question this my self. It's not my shader though.

koogs

what are you setting AmbientContribution to in the calling code?

PrinzJuliano

I dumped the shader alltogether since there were many more bugs and some things just did not work out!