updating of DE-Raytracer

[Crist-JRoger]

I make blending for Frag a-la photoshop  from here link of ContrastSaturationBrightness code. So simple funktions works well. I have problem with this:

Code:

vec3 BlendLinearLightf(vec3 base, vec3 blend) {
	return (blend < vec3(.5))?BlendSubstractf(base,(2.0*blend)):BlendAddf(base,(2.0*(blend - 0.5)));
}

Code:

ERROR: 2:317: '<' :  wrong operand types  no operation '<' exists that takes a left-hand operand of type 'in 3-component vector of float' and a right operand of type 'const 3-component vector of float' (or there is no acceptable conversion)

how else rewrite this?

[hobold]

how else rewrite this?

There is no standard definition for "is greater than" or "is less than" for vectors. What are you trying to accomplish? If that computation is meant to be done per vector component, you'll probably have to explicitly write it for every coordinate, and then combine the results into a vector variable again.

[Crist-JRoger]

hobold, thank you, it helps )


I added photoshop blending modes and hue correction from PhotoshopMathFP.glsl by Romain Dura. LinearBurn, LinearDodge, Lighten, Screen, Darken, LinearLight, Overlay, SoftLight, ColorDodge, ColorBurn, VividLight, PinLight, Reflect, Phoenix. #define BLENDING to call.
Two gradients and simple mixing, hue in buffershader.frag (i don't know is that right...). Attached testing renderer.

[3dickulus]

... in buffershader.frag (i don't know is that right...)

yes, nice work, good to see the buffershader.frag getting filled up with some code 

[DarkBeam]

  Amazing... PS fused with Fragmentarium!?

[Crist-JRoger]

Amazing... PS fused with Fragmentarium!?

it's simple arithmetic functions applied as Post-tab features. And from the same source )

I want add anamorphic streaks for direct light      
And I really don't know how to do that 

[Crist-JRoger]

Need somebody help. I created blurred glow which always horizontal directed on the screen. It's simple. I can't link this to light source coordinates  
It seems not so easy. This horizontal glow must be foreground as post-effect...

[3dickulus]

not sure exactly what you mean...

1. horizontal glow at light position?
2. god ray from light resulting in horizontal glow?

this might help I added a little bit of code in DE-Kn2.frag for one image, not sure if it works in other cases, meant for clouds at sunset or sunrise...

Code:

vec4 clouds(vec3 p0, vec3 p1){

       ....

// add fog anisotropy to clouds 3Dickulus 05/14/16
#ifdef KN_VOLUMETRIC
for(int j=0;j<HF_FogIter;j++) sum.xyz+=(ptLightGlow3(ro, p1)*(1./float(HF_FogIter)));
#endif

        return clamp(sum,0.0,1.0);
}

these images have the same number of subframes and  the same settings the only difference is one line in #ifdef KN_VOLUMETRIC ... #endif before return

edit: the reason I did this is because I found that clouds affected fog (looking through clouds at fog) but fog did not affect clouds (looking through fog at clouds) so objects like bulb and surface had fog effect on them but sky/clouds did not so it looked strange.

[Crist-JRoger]

Nice sunrise 

I mean pseudo lens effect like horizontal glow (anamorphic flares) in Star Trek film by JJ Abrams

[3dickulus]

for the full effect see the big picture http://www.fractalforums.com/index.php?action=gallery;sa=view;id=19150

hmmm... so need light and camera pos.xyz and view direction passed to buffershader.frag ?

this should be easy to do on C++ side by reading the values required and setting uniforms in the buffershader before executing
will try this with...

vec3 LightPos;
vec3 CamPos;
vec3 ViewDir;

can anyone tell me what else might be important to pass to the buffershader.frag this way ? maybe light color too ?

edit:

Technically, the method is only a modified simple bloomshader

according to this blog the code is already there, copy or modify the bloom code, just stretch on the axis
I may still add the uniforms mentioned above for more complex stuff

[3dickulus]

ok did some mucking about and found something that works on single image but not tiles... yet
image 1 has the sun in the centre, image 2 is just off centre, it's a bit rough and not fully/properly implemented
code goes in buffershader.frag, if you have better math and glsl skills than I, please have a look at the link
modified from glsl code found at http://john-chapman-graphics.blogspot.ca/2013/02/pseudo-lens-flare.html

with some refinements I think this could work and it's very fast, needs to be modified to work with tiles and subframes properly

[Crist-JRoger]

3dickulus, image2 - you got chromatic abberation  That's really cool!
I saw this blog, but did'n understand..

[Crist-JRoger]

I think it can be like this: https://www.shadertoy.com/view/4lBXR1  

[3dickulus]

I'll have a closer look at that tomorrow,
from initial look it might be better but testing will tell...
still need to consider tiles and subframes

[Crist-JRoger]

Ok, now i found by educated guess method  regulated DoF for background 

Code:

uniform sampler2D BG; file[tex.jpg]
//............
vec3 p=SRCurrentPt(Ray);
backColor += equirectangularMap(BG, Ray.Origin-p);