Problem mit Shadowmapping

[Oermel]

Hi Leute,

hab ein problem beim shadowmapping und frage euch woran das liegen könnte.
der screen ist hier:
http://img409.imageshack.us/my.php?image=screenlz5.png

erst dachte ich dass das selbstschattierung ist, aber der cube wirft seinen schatten auch auf den ring, kann mir jemand helfen?

ich poste mal n bissl code :

void
init( void )
{
    GLfloat  white[] = { 1.0, 1.0, 1.0, 1.0 };

    glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 
  		  SHADOW_MAP_WIDTH, SHADOW_MAP_HEIGHT, 0,
		  GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL );

    glLightfv( GL_LIGHT0, GL_POSITION, lightPos );
    glLightfv( GL_LIGHT0, GL_SPECULAR, white );
    glLightfv( GL_LIGHT0, GL_DIFFUSE, white );

    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL );
    glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE,
		     GL_COMPARE_R_TO_TEXTURE );

    glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
    glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
    glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
    glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );

    glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE );

    glCullFace( GL_BACK );

    glEnable( GL_DEPTH_TEST );
    glEnable( GL_LIGHT0 );
    glEnable( GL_LIGHTING );
    glEnable( GL_TEXTURE_2D );
    glEnable( GL_TEXTURE_GEN_S );
    glEnable( GL_TEXTURE_GEN_T );
    glEnable( GL_TEXTURE_GEN_R );
    glEnable( GL_TEXTURE_GEN_Q );
    glEnable( GL_COLOR_MATERIAL );
    glEnable( GL_CULL_FACE );
}

void
generateShadowMap( void )
{
    GLint    viewport[4];
    GLfloat  lightPos[4];

    glGetLightfv( GL_LIGHT0, GL_POSITION, lightPos );
    glGetIntegerv( GL_VIEWPORT, viewport );

    glViewport( 0, 0, SHADOW_MAP_WIDTH, SHADOW_MAP_HEIGHT );

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glMatrixMode( GL_PROJECTION );
    glPushMatrix(); {
	glLoadIdentity();
	gluPerspective( 80.0, 1.0, 10.0, 1000.0 );
	glMatrixMode( GL_MODELVIEW );

	glPushMatrix(); {
	    glLoadIdentity();
	    gluLookAt( lightPos[0], lightPos[1], lightPos[2],
		       lookat[0], lookat[1], lookat[2],
		       up[0], up[1], up[2] );

	    drawObjects( GL_TRUE );

	} glPopMatrix();
	glMatrixMode( GL_PROJECTION );
    } glPopMatrix();
    glMatrixMode( GL_MODELVIEW );

    glCopyTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 0, 0,
		      SHADOW_MAP_WIDTH, SHADOW_MAP_HEIGHT, 0 );

    glViewport( viewport[0], viewport[1], viewport[2], viewport[3] );

    if ( showShadow ) {
	GLfloat depthImage[SHADOW_MAP_WIDTH][SHADOW_MAP_HEIGHT];
	glReadPixels( 0, 0, SHADOW_MAP_WIDTH, SHADOW_MAP_HEIGHT, 
		      GL_DEPTH_COMPONENT, GL_FLOAT, depthImage );
	glRasterPos2f( viewport[2]/2, 0 );
	glDrawPixels( SHADOW_MAP_WIDTH, SHADOW_MAP_HEIGHT, GL_LUMINANCE, 
		      GL_FLOAT, depthImage );
	glutSwapBuffers();
    }
}

void
generateTextureMatrix( void )
{
    GLfloat  tmpMatrix[16];

    glPushMatrix(); {
	glLoadIdentity();
	glTranslatef( 0.5, 0.5, 0.0 );
	glScalef( 0.5, 0.5, 1.0 );
	gluPerspective( 60.0, 1.0, 1.0, 1000.0 );
	gluLookAt( lightPos[0], lightPos[1], lightPos[2],
		   lookat[0], lookat[1], lookat[2],
		   up[0], up[1], up[2] );
	glGetFloatv( GL_MODELVIEW_MATRIX, tmpMatrix );
    } glPopMatrix();

    transposeMatrix( tmpMatrix );

    glTexGenfv( GL_S, GL_OBJECT_PLANE, &tmpMatrix[0] );
    glTexGenfv( GL_T, GL_OBJECT_PLANE, &tmpMatrix[4] );
    glTexGenfv( GL_R, GL_OBJECT_PLANE, &tmpMatrix[8] );
    glTexGenfv( GL_Q, GL_OBJECT_PLANE, &tmpMatrix[12] );
}

mfg Oermel

[rapso]

vertausch mal zeile 99 und 100

[Oermel]

hmm... dann kommt kein schatten mehr

[Oermel]

habs, thx auf den hinweis, hab mit den beiden zeilen rumgespielt

EDIT: nu funktioniert das so: glTranslatef( 0.3, 0.3, 0.0 );
ohne glscale()