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Code Issues 121 Wiki Activity

Merge branch 'tmj-dev'

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This commit is contained in:
milek7
2017-11-23 16:55:18 +01:00
parent d630c94e9e 672b34ef54
commit 0aaeda576e
3 changed files with 43 additions and 11 deletions
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40
renderer.cpp
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@@ -486,7 +486,7 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
::glEnable( GL_SCISSOR_TEST );
setup_matrices();
::glEnable( GL_POLYGON_OFFSET_FILL ); // alleviate depth-fighting
::glPolygonOffset( 2.f, 2.f );
::glPolygonOffset( 1.f, 1.f );
// render
// opaque parts...
setup_drawing( false );
@@ -665,6 +665,7 @@ opengl_renderer::setup_pass( renderpass_config &Config, rendermode const Mode, f
}
case rendermode::shadows: {
// calculate lightview boundaries based on relevant area of the world camera frustum:
// ...setup chunk of frustum we're interested in...
auto const znear = 0.f;
@@ -697,18 +698,43 @@ opengl_renderer::setup_pass( renderpass_config &Config, rendermode const Mode, f
point = lightviewmatrix * point;
}
bounding_box( frustumchunkmin, frustumchunkmax, std::begin( frustumchunkshapepoints ), std::end( frustumchunkshapepoints ) );
// ...use the dimensions to set up light projection boundaries
// quantize the frustum points with 50 m resolution, to reduce shadow shimmer on scale/orientation changes
frustumchunkmin = 50.f * glm::floor( frustumchunkmin * ( 1.f / 50.f ) );
frustumchunkmax = 50.f * glm::ceil( frustumchunkmax * ( 1.f / 50.f ) );
// ...use the dimensions to set up light projection boundaries...
// NOTE: since we only have one cascade map stage, we extend the chunk forward/back to catch areas normally covered by other stages
auto const quantizationstep = ( Global::shadowtune.depth + 1000.f ) / m_shadowbuffersize;
frustumchunkmin.x -= std::remainder( frustumchunkmin.x, quantizationstep );
frustumchunkmin.y -= std::remainder( frustumchunkmin.y, quantizationstep );
frustumchunkmax.x -= std::remainder( frustumchunkmax.x, quantizationstep );
frustumchunkmax.y -= std::remainder( frustumchunkmax.y, quantizationstep );
camera.projection() *=
glm::ortho(
frustumchunkmin.x, frustumchunkmax.x,
frustumchunkmin.y, frustumchunkmax.y,
frustumchunkmin.z - 500.f, frustumchunkmax.z + 500.f );
/*
// fixed ortho projection from old build, for quick quality comparisons
camera.projection() *=
glm::ortho(
-Global::shadowtune.width, Global::shadowtune.width,
-Global::shadowtune.width, Global::shadowtune.width,
-Global::shadowtune.depth, Global::shadowtune.depth );
camera.position() = Global::pCameraPosition - glm::dvec3{ Global::DayLight.direction };
if( camera.position().y - Global::pCameraPosition.y < 0.1 ) {
camera.position().y = Global::pCameraPosition.y + 0.1;
}
viewmatrix *= glm::lookAt(
camera.position(),
glm::dvec3{ Global::pCameraPosition },
glm::dvec3{ 0.f, 1.f, 0.f } );
*/
// ... and adjust the projection to sample complete shadow map texels:
// get coordinates for a sample texel...
auto shadowmaptexel = glm::vec2 { camera.projection() * glm::mat4{ viewmatrix } * glm::vec4{ 0.f, 0.f, 0.f, 1.f } };
// ...convert result from clip space to texture coordinates, and calculate adjustment...
shadowmaptexel *= m_shadowbuffersize * 0.5f;
auto shadowmapadjustment = glm::round( shadowmaptexel ) - shadowmaptexel;
// ...transform coordinate change back to homogenous light space...
shadowmapadjustment /= m_shadowbuffersize * 0.5f;
// ... and bake the adjustment into the projection matrix
camera.projection() = glm::translate( glm::mat4{ 1.f }, glm::vec3{ shadowmapadjustment, 0.f } ) * camera.projection();
break;
}
case rendermode::reflections: {