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Adjust ground lighting up significantly higher to avoid zbuffer fighting

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on cards with 16 bit (or less) depth buffers.
This commit is contained in:
curt 2000-12-05 14:27:27 +00:00
parent a775392e31
commit 2baba715b4
3 changed files with 15 additions and 2 deletions
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3
src/Include/general.hxx
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@ -45,6 +45,7 @@ class FGGeneral {
char *glRenderer;
char *glVersion;
int glMaxTexSize;
int glDepthBits;
// Last frame rate measurement
int frame_rate;
@ -60,6 +61,8 @@ public:
inline void set_glVersion( char *str ) { glVersion = str; }
inline void set_glMaxTexSize( int i ) { glMaxTexSize = i; }
inline int get_glMaxTexSize() const { return glMaxTexSize; }
inline void set_glDepthBits( int d ) { glDepthBits = d; }
inline int get_glDepthBits() const { return glDepthBits; }
inline double get_frame_rate() const { return frame_rate; }
#ifdef FANCY_FRAME_COUNTER
inline double get_frame(int idx) const { return frames[idx]; }

7
src/Main/main.cxx
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@ -1267,12 +1267,17 @@ int fgGlutInit( int *argc, char **argv ) {
general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
FG_LOG( FG_GENERAL, FG_INFO, general.get_glRenderer() );
int tmp;
glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
general.set_glMaxTexSize( tmp );
FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
FG_LOG ( FG_GENERAL, FG_INFO, "Max texture size = " << tmp );
glGetIntegerv( GL_DEPTH_BITS, &tmp );
general.set_glDepthBits( tmp );
FG_LOG ( FG_GENERAL, FG_INFO, "Depth buffer bits = " << tmp );
#if 0
// try to determine if we should adjust the initial default
// display resolution. The options class defaults (is

5
src/Scenery/tileentry.cxx
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@ -34,6 +34,7 @@
#include <simgear/debug/logstream.hxx>
#include <Aircraft/aircraft.hxx>
#include <Include/general.hxx>
#include <Main/globals.hxx>
#include <Scenery/scenery.hxx>
#include <Time/light.hxx>
@ -207,7 +208,11 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, float vis) {
sgCopyVec3( to, sgTrans );
double dist = sgLengthVec3( to );
if ( general.get_glDepthBits() > 16 ) {
sgScaleVec3( up, 10.0 + agl / 100.0 + dist / 10000 );
} else {
sgScaleVec3( up, 10.0 + agl / 20.0 + dist / 5000 );
}
sgAddVec3( sgTrans, up );
lights_transform->setTransform( sgTrans );