#version 410
in vec3 col;
in vec3 nor;
in vec2 uv;
in vec2 txUv;

// part attrs (beyond commonDeclare'd)
uniform float partIndex_colorize;
uniform float partIndex_textAtlasSubrect;
uniform float partIndex_textColor_o;
//@ME textColor_o:r,g,b, distance
uniform float partIndex_textColor2_o;
//@ME textColor2_o:r,g,b,.

uniform float partIndex_misc_o;
//@ME misc_o:edgeDarkness, edgeLimit,.,.

//in float partSlot;

out vec3 colV; // ramped color from vertex color
out vec3 norV; // ramped normal from vertex normal and transforms
out vec2 uvV; // ramped uv from vertex uv
out vec2 txUvV; // ramped uv from vertex text uv

out vec4 partTextAtlasSubrectV;
out vec4 partTextColorV; // r,g,b, texturedistance
out vec4 partTextColor2V; // r,g,b -- second color for text.
out vec4 partMiscV;

#include "commonDeclare.glsl"

void main(void)
{
#include "commonProjection.glsl"
    
    float dNoTexture = 46.0;

    vec4 partColorize = texture(partValues, vec2(partIndex_colorize, partSlot));
    
    colV = mix(col, partColorize.rgb, partColorize.a);
    uvV = 1.0 - uv;
    txUvV = 1.0 - txUv;
    norV = mat3(viewMatrix) * nor;
    
    partTextAtlasSubrectV = texture(partValues, vec2(partIndex_textAtlasSubrect, partSlot));
    
    // swap left & right um
    // dvb2015 is this a hack or a strategy? TODO: understand up, down, left, and right.
    float t = partTextAtlasSubrectV[0];
    partTextAtlasSubrectV[0] = partTextAtlasSubrectV[2];
    partTextAtlasSubrectV[2] = t;
    
    partTextColorV = texture(partValues, vec2(partIndex_textColor_o, partSlot));
    partTextColor2V = texture(partValues, vec2(partIndex_textColor2_o, partSlot));
    partMiscV = texture(partValues, vec2(partIndex_misc_o, partSlot));
    
    // fourth component of text color is max-visible-distance of the texture. If nonzero. Else dflt.
    if(partTextColorV.a < 0.01)
        partTextColorV.a = dNoTexture;
}