Re: [Flightgear-devel] landmass geometry shader rewrite
On Fri, Apr 23, 2010 at 11:14 AM, Erik Hofman e...@ehofman.com wrote: Tim Moore wrote: Looks like the same attribute problem. What hardware? NVidia 9600GT/512Mb on AMD X2 250 wn 2Gb memory. I've eliminated some varying parameters from the landmass vertex and geometry shaders. Please give it a try and see if it works better. Tim -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] landmass geometry shader rewrite
Erik Hofman wrote:
Tim Moore wrote:
I've eliminated some varying parameters from the landmass vertex and
geometry shaders. Please give it a try and see if it works better.
Yes this works for me, excellent!
If I do the same kind of thing to landmass.vert/frag using this patch I
also get back the settings below quality level=3.5
It's just a matter of moving one (seemingly unused) 'varying float' to
landmass.frag
Erik
Index: landmass.frag
===
RCS file: /var/cvs/FlightGear-0.9/data/Shaders/landmass.frag,v
retrieving revision 1.8
diff -p -u -r1.8 landmass.frag
--- landmass.frag 10 Apr 2010 15:09:18 - 1.8
+++ landmass.frag 30 Apr 2010 16:38:00 -
@@ -7,7 +7,6 @@ varying vec3 VTangent;
varying vec3 VBinormal;
varying vec3 Normal;
varying vec4 constantColor;
-varying float bump;
uniform sampler3D NoiseTex;
uniform sampler2D BaseTex;
@@ -55,12 +54,14 @@ float ray_intersect(sampler2D reliefMap,
void main (void)
{
+float bump = 1.0;
+
if ( quality_level = 3.5 ) {
linear_search_steps = 20;
}
- vec2 uv, dp, ds;
+ vec2 uv, dp = vec2(0, 0), ds = vec2(0, 0);
vec3 N;
- float d;
+ float d = 0;
if ( bump 0.9 quality_level = 2.0 )
{
vec3 V = normalize(ecPosition.xyz);
Index: landmass.vert
===
RCS file: /var/cvs/FlightGear-0.9/data/Shaders/landmass.vert,v
retrieving revision 1.5
diff -p -u -r1.5 landmass.vert
--- landmass.vert 2 Apr 2010 07:06:40 - 1.5
+++ landmass.vert 30 Apr 2010 16:38:00 -
@@ -5,7 +5,6 @@ varying vec3 VTangent;
varying vec3 VBinormal;
varying vec3 Normal;
varying vec4 constantColor;
-varying float bump;
attribute vec3 tangent;
attribute vec3 binormal;
@@ -18,7 +17,6 @@ void main(void)
VNormal = gl_NormalMatrix * gl_Normal;
VTangent = gl_NormalMatrix * tangent;
VBinormal = gl_NormalMatrix * binormal;
- bump = 1.0;
gl_FrontColor = gl_Color;
constantColor = gl_FrontMaterial.emission
--
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Re: [Flightgear-devel] landmass geometry shader rewrite
Tim Moore wrote: Hi, I hacked on the landmass geometry shader a bit. On my machine I got the frame rate to improve from 14 fps to 52 fps using the ufo at ksfo. This technique may be promising, although it could certainly stand some new textures. Anyone playing with geometry shaders in the terrain (and also models) should follow the example of landmass-g.vert and landmass.geom. Let me know if I broke anything in the graphical appearance, or if any OpenGL problems are introduced. After this change I get te following in all quality levels: glLinkProgram FAILED Program infolog: Fragment info - (61) : warning C7050: ds might be used before being initialized (61) : warning C7050: dp might be used before being initialized (63) : warning C7050: d might be used before being initialized Link info - Vertex attribute output count exceeds hardware limits. Program's vertex attrib binding 7, binormal Program's vertex attrib binding 15, normal Program's vertex attrib binding 6, tangent Before this change I did have proper landmass shaders with the quality level set above 3.5, now I don't get proper shader in any level (dark green untextured landmass). Erik -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] landmass geometry shader rewrite
On Fri, Apr 23, 2010 at 10:46 AM, Erik Hofman e...@ehofman.com wrote: Tim Moore wrote: Hi, I hacked on the landmass geometry shader a bit. On my machine I got the frame rate to improve from 14 fps to 52 fps using the ufo at ksfo. This technique may be promising, although it could certainly stand some new textures. Anyone playing with geometry shaders in the terrain (and also models) should follow the example of landmass-g.vert and landmass.geom. Let me know if I broke anything in the graphical appearance, or if any OpenGL problems are introduced. After this change I get te following in all quality levels: glLinkProgram FAILED Program infolog: Fragment info - (61) : warning C7050: ds might be used before being initialized (61) : warning C7050: dp might be used before being initialized (63) : warning C7050: d might be used before being initialized Link info - Vertex attribute output count exceeds hardware limits. Program's vertex attrib binding 7, binormal Program's vertex attrib binding 15, normal Program's vertex attrib binding 6, tangent Before this change I did have proper landmass shaders with the quality level set above 3.5, now I don't get proper shader in any level (dark green untextured landmass). Erik Looks like the same attribute problem. What hardware? Tim -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] landmass geometry shader rewrite
Tim Moore wrote: Looks like the same attribute problem. What hardware? NVidia 9600GT/512Mb on AMD X2 250 wn 2Gb memory. Erik -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] landmass geometry shader rewrite
- Tim Moore a écrit : Looks like the same attribute problem. What hardware? for the record, I see an improvement from 8fps to 30fps on a NVIDIA geForce 9700M GT Thank you Tim -Fred -- Frédéric Bouvier http://my.fotolia.com/frfoto/ Photo gallery - album photo http://www.youtube.com/user/fgfred64 Videos -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
