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Code Issues 121 Wiki Activity

Fog, skydome and other environment tweaks

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This commit is contained in:
Jano211
2023-08-11 21:19:52 +02:00
committed by Hirek
parent 92958a28d2
commit e228366c42
6 changed files with 55 additions and 25 deletions
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20
skydome.cpp
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@@ -10,8 +10,8 @@
// by A. J. Preetham Peter Shirley Brian Smits (University of Utah)
float CSkyDome::m_distributionluminance[ 5 ][ 2 ] = { // Perez distributions
{ 0.17872f , -1.46303f }, // a = darkening or brightening of the horizon
{ -0.35540f , 0.42749f }, // b = luminance gradient near the horizon,
{ 0.17872f , -1.66303f }, // a = darkening or brightening of the horizon
{ -0.35540f , 0.42750f }, // b = luminance gradient near the horizon,
{ -0.02266f , 5.32505f }, // c = relative intensity of the circumsolar region
{ 0.12064f , -2.57705f }, // d = width of the circumsolar region
{ -0.06696f , 0.37027f } // e = relative backscattered light
@@ -48,8 +48,8 @@ CSkyDome::CSkyDome (int const Tesselation) :
m_tesselation( Tesselation ) {
// SetSunPosition( Math3D::vector3(75.0f, 0.0f, 0.0f) );
SetTurbidity( 3.0f );
SetExposure( true, 20.0f );
SetTurbidity( Global.fTurbidity );
SetExposure( true, 10.0f );
SetOvercastFactor( 0.05f );
Generate();
}
@@ -109,7 +109,7 @@ void CSkyDome::Generate() {
}
void CSkyDome::Update( glm::vec3 const &Sun ) {
SetTurbidity(Global.fTurbidity);
if( true == SetSunPosition( Sun ) ) {
// build colors if there's a change in sun position
RebuildColors();
@@ -134,7 +134,7 @@ bool CSkyDome::SetSunPosition( glm::vec3 const &Direction ) {
void CSkyDome::SetTurbidity( float const Turbidity ) {
m_turbidity = clamp( Turbidity, 1.f, 4.f );
m_turbidity = clamp( Turbidity, 1.f, 128.f );
}
void CSkyDome::SetExposure( bool const Linearexposure, float const Expfactor ) {
@@ -296,20 +296,20 @@ void CSkyDome::RebuildColors() {
color.y = 0.65f * color.z;
}
// simple gradient, darkening towards the top
color *= clamp( ( 1.25f - vertex.y ), 0.f, 1.f );
// color *= ( 1.25f - vertex.y );
color *= clamp( ( 1.0f - vertex.y ), 0.f, 1.f );
//color *= ( 0.25f - vertex.y );
// gamma correction
color = glm::pow( color, gammacorrection );
m_colours[ i ] = color;
averagecolor += color;
if( ( m_vertices.size() - i ) <= ( m_tesselation * 3 + 3 ) ) {
if( ( m_vertices.size() - i ) <= ( m_tesselation * 10 + 10 ) ) {
// calculate horizon colour from the bottom band of tris
averagehorizoncolor += color;
}
}
m_averagecolour = glm::max( glm::vec3(), averagecolor / static_cast<float>( m_vertices.size() ) );
m_averagehorizoncolour = glm::max( glm::vec3(), averagehorizoncolor / static_cast<float>( m_tesselation * 3 + 3 ) );
m_averagehorizoncolour = glm::max( glm::vec3(), averagehorizoncolor / static_cast<float>( m_tesselation * 10 + 10 ) );
m_dirty = true;
}