final fix

Author: keldu

backend_opengl2.c

@@ -1,3 +1,5 @@
+#include <math.h>
+
 int backend_compile_shader(GLuint shader_id, unsigned char** shader_source, ssize_t shader_length){
 	GLint result = GL_FALSE;
 	int log_length;
@@ -226,7 +228,7 @@ int xlaser_render(XRESOURCES* xres, uint8_t* channels){
 	double dimmer_factor = (double) channels[DIMMER] / 255.0;
 	uint8_t selected_gobo;
 	double focus = (double) channels[FOCUS] / 255.0;
-	const double trace = 1.0 - (double) channels[TRACE] / 255.0;
+	const double trace = sqrt(1.0 - (double) channels[TRACE] / 255.0);
 	const double angle = M_PI * 2 *((double) (channels[ROTATION] / 255.0));
 	const double cos_a = cos(angle);
 	const double sin_a = sin(angle);

shaders/hdr_fragment.shader

@@ -10,7 +10,7 @@ void main(){
 	vec4 hdrColor = texture2D( goboSampler, UV );
 	vec4 bloomColor = texture2D( textureSampler, UV );
 	//hdrColor += bloomColor;
-	vec3 result = vec3(1.0) - exp( -hdrColor.rgb -bloomColor.rgb * exposure );
+	vec3 result = vec3(1.0) - exp( (-hdrColor.rgb * 0.5 -bloomColor.rgb) * exposure );
 	result = pow( result, vec3( 1.0 / gamma ));
 	gl_FragColor = vec4(result.rgb, 1.0);
 }