fix(rendering): fix bloom not working (#78)

assets/shaders/highPass_frag.glsl

@@ -6,19 +6,14 @@ in vec2 v_uv0;
 
 uniform sampler2D tex;
 uniform float highPassThreshold;
+uniform float highPassIntensity;
 
 layout(location = 0) out vec4 outColor;
 
 void main() {
     vec4 color = texture(tex, v_uv0.xy);
 
-    // vec3 brightColor = max(color.rgb - vec3(highPassThreshold), vec3(0.0));
-    float relativeLuminance = dot(vec3(0.2126, 0.7152, 0.0722),color.rgb - vec3(highPassThreshold));
-    // bright = smoothstep(0.0, 0.5, bright);
-
-    if(relativeLuminance * highPassThreshold > 1.0) {
-        outColor.rgba = vec4(color.rgb, 1);
-    } else {
-        outColor.rgba = vec4(0);
-    }
+    float relativeLuminance = dot(vec3(0.2125, 0.7154, 0.0721), color.rgb);
+    relativeLuminance = clamp(relativeLuminance - highPassThreshold, 0, 1);
+    outColor = color * relativeLuminance * highPassIntensity;
 }

src/main/java/org/terasology/corerendering/rendering/dag/nodes/HighPassNode.java

@@ -35,9 +35,12 @@ public class HighPassNode extends ConditionDependentNode {
     public static final FboConfig HIGH_PASS_FBO_CONFIG = new FboConfig(HIGH_PASS_FBO_URI, FULL_SCALE, FBO.Type.DEFAULT);
     private static final ResourceUrn HIGH_PASS_MATERIAL_URN = new ResourceUrn("CoreRendering:highPass");
 
+    @SuppressWarnings("FieldCanBeLocal")
+    @Range(min = 0.0f, max = 1.0f)
+    private float highPassThreshold = 0.02f;
     @SuppressWarnings("FieldCanBeLocal")
     @Range(min = 0.0f, max = 5.0f)
-    private float highPassThreshold = 0.05f;
+    private float highPassIntensity = 0.6f;
 
     private Material highPass;
     private Mesh renderQuad;
@@ -86,6 +89,7 @@ public void process() {
         PerformanceMonitor.startActivity("rendering/" + getUri());
 
         highPass.setFloat("highPassThreshold", highPassThreshold, true);
+        highPass.setFloat("highPassIntensity", highPassIntensity, true);
 
         renderQuad.render();