diff options
Diffstat (limited to 'gfx/gl/shadowMapper.cpp')
| -rw-r--r-- | gfx/gl/shadowMapper.cpp | 126 |
1 files changed, 29 insertions, 97 deletions
diff --git a/gfx/gl/shadowMapper.cpp b/gfx/gl/shadowMapper.cpp index ab4ac50..4dbee8d 100644 --- a/gfx/gl/shadowMapper.cpp +++ b/gfx/gl/shadowMapper.cpp @@ -1,6 +1,7 @@ #include "shadowMapper.h" #include "camera.h" #include "collections.h" +#include "gfx/gl/shaders/gs-commonShadowPoint.h" #include "gfx/gl/shaders/vs-shadowDynamicPoint.h" #include "gfx/gl/shaders/vs-shadowDynamicPointInst.h" #include "gfx/gl/shaders/vs-shadowFixedPoint.h" @@ -19,17 +20,18 @@ ShadowMapper::ShadowMapper(const TextureAbsCoord & s) : fixedPoint {shadowFixedPoint_vs}, dynamicPointInst {shadowDynamicPointInst_vs}, size {s} { - glBindTexture(GL_TEXTURE_2D, depthMap); - glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, size.x, size.y, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr); - glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); - glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); + glBindTexture(GL_TEXTURE_2D_ARRAY, depthMap); + glTexImage3D( + GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT, size.x, size.y, 4, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr); + glTexParameter(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameter(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameter(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); + glTexParameter(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); static constexpr RGBA border {std::numeric_limits<RGBA::value_type>::infinity()}; - glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, border); + glTexParameter(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BORDER_COLOR, border); glBindFramebuffer(GL_FRAMEBUFFER, depthMapFBO); - glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthMap, 0); + glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, depthMap, 0); glDrawBuffer(GL_NONE); glReadBuffer(GL_NONE); if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) { @@ -38,48 +40,6 @@ ShadowMapper::ShadowMapper(const TextureAbsCoord & s) : glBindFramebuffer(GL_FRAMEBUFFER, 0); } -constexpr std::array<std::array<TextureAbsRegion, ShadowMapper::SHADOW_BANDS>, ShadowMapper::SHADOW_BANDS> viewports {{ - {{ - {31, 31, 0, 0}, // full - }}, - {{ - {31, 31, 0, 1}, // lower half - {31, 1, 0, 1}, // upper half - }}, - {{ - {31, 31, 0, 1}, // lower half - {31, 1, 1, 1}, // upper left - {1, 1, 1, 1}, // upper right - }}, - {{ - {31, 31, 1, 1}, // lower left - {1, 31, 1, 1}, // lower right - {31, 1, 1, 1}, // upper left - {1, 1, 1, 1}, // upper right - }}, -}}; -constexpr std::array<std::array<TextureRelRegion, ShadowMapper::SHADOW_BANDS>, ShadowMapper::SHADOW_BANDS> - shadowMapRegions {{ - {{ - {0.5F, 0.5F, 0.5F, 0.5F}, // full - }}, - {{ - {0.5F, 0.25F, 0.5F, 0.25F}, // lower half - {0.5F, 0.25F, 0.5F, 0.75F}, // upper half - }}, - {{ - {0.5F, 0.25F, 0.5F, 0.25F}, // lower half - {0.25F, 0.25F, 0.25F, 0.75F}, // upper left - {0.25F, 0.25F, 0.75F, 0.75F}, // upper right - }}, - - {{ - {0.25F, 0.25F, 0.25F, 0.25F}, // lower left - {0.25F, 0.25F, 0.75F, 0.25F}, // lower right - {0.25F, 0.25F, 0.25F, 0.75F}, // upper left - {0.25F, 0.25F, 0.75F, 0.75F}, // upper right - }}, - }}; constexpr std::array<GlobalDistance, ShadowMapper::SHADOW_BANDS + 1> shadowBands { 1000, 250000, @@ -87,24 +47,6 @@ constexpr std::array<GlobalDistance, ShadowMapper::SHADOW_BANDS + 1> shadowBands 2500000, 10000000, }; -static_assert(viewports.size() == shadowMapRegions.size()); -static_assert(shadowBands.size() == shadowMapRegions.size() + 1); - -struct DefinitionsInserter { - auto - operator++() - { - return out.maps++; - }; - - auto - operator*() - { - return std::tie(out.projections[out.maps], out.regions[out.maps]); - } - - ShadowMapper::Definitions & out; -}; std::vector<std::array<RelativePosition3D, 4>> ShadowMapper::getBandViewExtents(const Camera & camera, const glm::mat4 & lightViewDir) @@ -130,16 +72,15 @@ ShadowMapper::update(const SceneProvider & scene, const Direction3D & dir, const glBindFramebuffer(GL_FRAMEBUFFER, depthMapFBO); glClear(GL_DEPTH_BUFFER_BIT); glCullFace(GL_FRONT); + glViewport(0, 0, size.x, size.y); const auto lightViewDir = glm::lookAt({}, dir, up); const auto lightViewPoint = camera.getPosition(); const auto bandViewExtents = getBandViewExtents(camera, lightViewDir); - Definitions out; std::transform(bandViewExtents.begin(), std::prev(bandViewExtents.end()), std::next(bandViewExtents.begin()), - DefinitionsInserter {out}, - [&scene, this, bands = bandViewExtents.size() - 2, &out, &lightViewPoint, &lightViewDir]( - const auto & near, const auto & far) { + std::back_inserter(out), + [bands = bandViewExtents.size() - 2, &lightViewDir](const auto & near, const auto & far) mutable { const auto extents_minmax = [extents = std::span {near.begin(), far.end()}](auto && comp) { const auto mm = std::minmax_element(extents.begin(), extents.end(), comp); return std::make_pair(comp.get(*mm.first), comp.get(*mm.second)); @@ -149,54 +90,45 @@ ShadowMapper::update(const SceneProvider & scene, const Direction3D & dir, const return glm::ortho(x.first, x.second, y.first, y.second, -z.second, -z.first); }(extents_minmax(CompareBy {0}), extents_minmax(CompareBy {1}), extents_minmax(CompareBy {2})); - const auto lightViewDirProjection = lightProjection * lightViewDir; - fixedPoint.setViewProjection(lightViewPoint, lightViewDirProjection); - dynamicPoint.setViewProjection(lightViewPoint, lightViewDirProjection); - dynamicPointInst.setViewProjection(lightViewPoint, lightViewDirProjection); - - const auto & viewport = viewports[bands][out.maps]; - glViewport(size.x >> viewport.x, size.y >> viewport.y, size.x >> viewport.z, size.y >> viewport.w); - scene.shadows(*this); - - return std::make_pair(lightViewDirProjection, shadowMapRegions[bands][out.maps]); + return lightProjection * lightViewDir; }); + for (const auto p : std::initializer_list<const ShadowProgram *> {&fixedPoint, &dynamicPoint, &dynamicPointInst}) { + p->setView(out, lightViewPoint); + } + scene.shadows(*this); glCullFace(GL_BACK); return out; } -ShadowMapper::FixedPoint::FixedPoint(const Shader & vs) : - Program {vs}, viewProjectionLoc {*this, "viewProjection"}, viewPointLoc {*this, "viewPoint"} +ShadowMapper::ShadowProgram::ShadowProgram(const Shader & vs) : + Program {vs, commonShadowPoint_gs}, viewProjectionLoc {*this, "viewProjection"}, + viewProjectionsLoc {*this, "viewProjections"}, viewPointLoc {*this, "viewPoint"} { } void -ShadowMapper::FixedPoint::setViewProjection(const GlobalPosition3D viewPoint, const glm::mat4 & viewProjection) const +ShadowMapper::ShadowProgram::setView( + const std::span<const glm::mat4> viewProjection, const GlobalPosition3D viewPoint) const { use(); - glUniform(viewProjectionLoc, viewProjection); glUniform(viewPointLoc, viewPoint); + glUniform(viewProjectionLoc, viewProjection); + glUniform(viewProjectionsLoc, static_cast<GLint>(viewProjection.size())); } void -ShadowMapper::FixedPoint::use() const +ShadowMapper::ShadowProgram::use() const { glUseProgram(*this); } -ShadowMapper::DynamicPoint::DynamicPoint() : - Program {shadowDynamicPoint_vs}, viewProjectionLoc {*this, "viewProjection"}, viewPointLoc {*this, "viewPoint"}, - modelLoc {*this, "model"}, modelPosLoc {*this, "modelPos"} -{ -} +ShadowMapper::FixedPoint::FixedPoint(const Shader & vs) : ShadowProgram {vs} { } -void -ShadowMapper::DynamicPoint::setViewProjection(const GlobalPosition3D viewPoint, const glm::mat4 & viewProjection) const +ShadowMapper::DynamicPoint::DynamicPoint() : + ShadowProgram {shadowDynamicPoint_vs}, modelLoc {*this, "model"}, modelPosLoc {*this, "modelPos"} { - glUseProgram(*this); - glUniform(viewProjectionLoc, viewProjection); - glUniform(viewPointLoc, viewPoint); } void |