OpenSpace/modules/softwareintegration/shaders/point_vs.glsl

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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2022                                                               *
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#version __CONTEXT__

#include "PowerScaling/powerScaling_vs.hglsl"

const float Parsec = 3.0856776e16;

layout(location = 0) in vec3 in_position;
in float in_colormapAttributeScalar;
in float in_linearSizeAttributeScalar;

in vec3 in_velocity;
// out vec4 vs_gPosition;

out float vs_colormapAttributeScalar;
flat out float vs_linearSizeAttributeScalar;

uniform bool motionEnabled;
uniform float theTime;

void main() {
    vs_colormapAttributeScalar = in_colormapAttributeScalar;
    vs_linearSizeAttributeScalar = in_linearSizeAttributeScalar;
    
    // Don't show points with no value for velocity
    // if (motionEnabled && (isnan(in_velocity[0]) || isnan(in_velocity[1]) || isnan(in_velocity[2]))) {
    //     vs_gPosition = vec4(0.0);    
    //     gl_Position = vec4(0.0);
    //     return;
    // }

    vec4 objectPosition = vec4(in_position, 1.0);

    // Add velocity if applicable
    if (motionEnabled) {
        // TODO: How to handle NaN velocity values???
        if (!isnan(in_velocity[0]) || !isnan(in_velocity[1]) || !isnan(in_velocity[2])) {
            objectPosition.xyz += 10*theTime/Parsec * in_velocity;
        }
        // objectPosition.xyz += theTime * vec3(500000.0, 500000.0, 500000.0); 
    }

    gl_Position = objectPosition;
}