Hi,
I have this (old but working
) glow shader.
I was wandering if someone is willing to tudor me how to rewrite it for GS.
Any help typed here is wellcomed. Please talk to me like Im 3 years old since shaders are really strangers to me.
Here is teh shader:
Code:
#include "Constants.h"
// v0 -- position
// v1 -- normal
// CV_SCALING = (edgesize, 0.0f, 0.0f, 0.0f)
vs.1.0
mul r4, v1, c[CV_SCALING].xxxy
add r4, v0, r4
// transform position
dp4 oPos.x, r4, c[CV_WORLDVIEWPROJ_0]
dp4 oPos.y, r4, c[CV_WORLDVIEWPROJ_1]
dp4 oPos.z, r4, c[CV_WORLDVIEWPROJ_2]
dp4 oPos.w, r4, c[CV_WORLDVIEWPROJ_3]
// transform normal
dp3 r0.x, v1, c[CV_WORLD_IT_0]
dp3 r0.y, v1, c[CV_WORLD_IT_1]
dp3 r0.z, v1, c[CV_WORLD_IT_2]
// normalize normal
dp3 r0.w, r0, r0
rsq r0.w, r0.w
mul r0, r0, r0.w
// compute world space position
dp4 r1.x, r4, c[CV_WORLD_0]
dp4 r1.y, r4, c[CV_WORLD_1]
dp4 r1.z, r4, c[CV_WORLD_2]
// vector from point to eye
add r2.xyz, c[CV_EYE], -r1
// normalize e
dp3 r2.w, r2, r2
rsq r2.w, r2.w
mul r2, r2, r2.w
//alpha value
dp3 oD0.w, r0, r2
mov oD0.xyz, c[CV_COLOR]
constants file:
Code:
#define CV_WORLDVIEWPROJ_0 0
#define CV_WORLDVIEWPROJ_1 1
#define CV_WORLDVIEWPROJ_2 2
#define CV_WORLDVIEWPROJ_3 3
#define CV_LIGHT_DIRECTION 4
#define CV_WORLD_IT_0 5
#define CV_WORLD_IT_1 6
#define CV_WORLD_IT_2 7
#define CV_WORLD_IT_3 8
#define CV_CONSTANTS 9
#define CV_EYE 10
#define CV_WORLD_0 11
#define CV_WORLD_1 12
#define CV_WORLD_2 13
#define CV_WORLD_3 14
#define CV_SCALING 15
#define CV_COLOR 16
its from nvidia effectsBrowser.