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Fix typo in getting-started/3-improving #18

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Fix typo in getting-started/3-improving #18

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4 changes: 2 additions & 2 deletions getting-started/3-improving.md
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ void main() {
vec4 lightColor = texture(lightmap, lightCoord);

// Calculate our new fog color!
float fogValue = vertexPosition < fogEnd ? smoothstep(fogStart, fogEnd, vertexPosition) : 1.0;
float fogValue = vertexDistance < fogEnd ? smoothstep(fogStart, fogEnd, vertexDistance) : 1.0;

vec4 finalColor = texColor * lightColor * vertexColor;
pixelColor = vec4(mix(finalColor.xyz, fogColor, fogValue), finalColor.a);
Expand All @@ -65,4 +65,4 @@ void main() {

Note the use of the `mix` function, which mixes the first and second color based on the third value.

Once you reload, you should now see you have border fog!
Once you reload, you should now see you have border fog!