From c47313db65f968559711ac1b505ef341a9872017 Mon Sep 17 00:00:00 2001 From: Liso Date: Sun, 6 Jun 2021 18:51:21 +0200 Subject: Shadow mapping render pass (#11244) Co-authored-by: x2048 --- src/client/shadows/dynamicshadows.cpp | 145 +++++++ src/client/shadows/dynamicshadows.h | 102 +++++ src/client/shadows/dynamicshadowsrender.cpp | 539 ++++++++++++++++++++++++++ src/client/shadows/dynamicshadowsrender.h | 146 +++++++ src/client/shadows/shadowsScreenQuad.cpp | 67 ++++ src/client/shadows/shadowsScreenQuad.h | 45 +++ src/client/shadows/shadowsshadercallbacks.cpp | 44 +++ src/client/shadows/shadowsshadercallbacks.h | 34 ++ 8 files changed, 1122 insertions(+) create mode 100644 src/client/shadows/dynamicshadows.cpp create mode 100644 src/client/shadows/dynamicshadows.h create mode 100644 src/client/shadows/dynamicshadowsrender.cpp create mode 100644 src/client/shadows/dynamicshadowsrender.h create mode 100644 src/client/shadows/shadowsScreenQuad.cpp create mode 100644 src/client/shadows/shadowsScreenQuad.h create mode 100644 src/client/shadows/shadowsshadercallbacks.cpp create mode 100644 src/client/shadows/shadowsshadercallbacks.h (limited to 'src/client/shadows') diff --git a/src/client/shadows/dynamicshadows.cpp b/src/client/shadows/dynamicshadows.cpp new file mode 100644 index 000000000..775cdebce --- /dev/null +++ b/src/client/shadows/dynamicshadows.cpp @@ -0,0 +1,145 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include + +#include "client/shadows/dynamicshadows.h" +#include "client/client.h" +#include "client/clientenvironment.h" +#include "client/clientmap.h" +#include "client/camera.h" + +using m4f = core::matrix4; + +void DirectionalLight::createSplitMatrices(const Camera *cam) +{ + float radius; + v3f newCenter; + v3f look = cam->getDirection(); + + v3f camPos2 = cam->getPosition(); + v3f camPos = v3f(camPos2.X - cam->getOffset().X * BS, + camPos2.Y - cam->getOffset().Y * BS, + camPos2.Z - cam->getOffset().Z * BS); + camPos += look * shadow_frustum.zNear; + camPos2 += look * shadow_frustum.zNear; + float end = shadow_frustum.zNear + shadow_frustum.zFar; + newCenter = camPos + look * (shadow_frustum.zNear + 0.05f * end); + v3f world_center = camPos2 + look * (shadow_frustum.zNear + 0.05f * end); + // Create a vector to the frustum far corner + // @Liso: move all vars we can outside the loop. + float tanFovY = tanf(cam->getFovY() * 0.5f); + float tanFovX = tanf(cam->getFovX() * 0.5f); + + const v3f &viewUp = cam->getCameraNode()->getUpVector(); + // viewUp.normalize(); + + v3f viewRight = look.crossProduct(viewUp); + // viewRight.normalize(); + + v3f farCorner = look + viewRight * tanFovX + viewUp * tanFovY; + // Compute the frustumBoundingSphere radius + v3f boundVec = (camPos + farCorner * shadow_frustum.zFar) - newCenter; + radius = boundVec.getLength() * 2.0f; + // boundVec.getLength(); + float vvolume = radius * 2.0f; + + float texelsPerUnit = getMapResolution() / vvolume; + m4f mTexelScaling; + mTexelScaling.setScale(texelsPerUnit); + + m4f mLookAt, mLookAtInv; + + mLookAt.buildCameraLookAtMatrixLH(v3f(0.0f, 0.0f, 0.0f), -direction, v3f(0.0f, 1.0f, 0.0f)); + + mLookAt *= mTexelScaling; + mLookAtInv = mLookAt; + mLookAtInv.makeInverse(); + + v3f frustumCenter = newCenter; + mLookAt.transformVect(frustumCenter); + frustumCenter.X = floorf(frustumCenter.X); // clamp to texel increment + frustumCenter.Y = floorf(frustumCenter.Y); // clamp to texel increment + frustumCenter.Z = floorf(frustumCenter.Z); + mLookAtInv.transformVect(frustumCenter); + // probar radius multipliacdor en funcion del I, a menor I mas multiplicador + v3f eye_displacement = direction * vvolume; + + // we must compute the viewmat with the position - the camera offset + // but the shadow_frustum position must be the actual world position + v3f eye = frustumCenter - eye_displacement; + shadow_frustum.position = world_center - eye_displacement; + shadow_frustum.length = vvolume; + shadow_frustum.ViewMat.buildCameraLookAtMatrixLH(eye, frustumCenter, v3f(0.0f, 1.0f, 0.0f)); + shadow_frustum.ProjOrthMat.buildProjectionMatrixOrthoLH(shadow_frustum.length, + shadow_frustum.length, -shadow_frustum.length, + shadow_frustum.length,false); +} + +DirectionalLight::DirectionalLight(const u32 shadowMapResolution, + const v3f &position, video::SColorf lightColor, + f32 farValue) : + diffuseColor(lightColor), + farPlane(farValue), mapRes(shadowMapResolution), pos(position) +{} + +void DirectionalLight::update_frustum(const Camera *cam, Client *client) +{ + should_update_map_shadow = true; + float zNear = cam->getCameraNode()->getNearValue(); + float zFar = getMaxFarValue(); + + /////////////////////////////////// + // update splits near and fars + shadow_frustum.zNear = zNear; + shadow_frustum.zFar = zFar; + + // update shadow frustum + createSplitMatrices(cam); + // get the draw list for shadows + client->getEnv().getClientMap().updateDrawListShadow( + getPosition(), getDirection(), shadow_frustum.length); + should_update_map_shadow = true; +} + +void DirectionalLight::setDirection(v3f dir) +{ + direction = -dir; + direction.normalize(); +} + +v3f DirectionalLight::getPosition() const +{ + return shadow_frustum.position; +} + +const m4f &DirectionalLight::getViewMatrix() const +{ + return shadow_frustum.ViewMat; +} + +const m4f &DirectionalLight::getProjectionMatrix() const +{ + return shadow_frustum.ProjOrthMat; +} + +m4f DirectionalLight::getViewProjMatrix() +{ + return shadow_frustum.ProjOrthMat * shadow_frustum.ViewMat; +} diff --git a/src/client/shadows/dynamicshadows.h b/src/client/shadows/dynamicshadows.h new file mode 100644 index 000000000..a53612f7c --- /dev/null +++ b/src/client/shadows/dynamicshadows.h @@ -0,0 +1,102 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once + +#include "irrlichttypes_bloated.h" +#include +#include "util/basic_macros.h" + +class Camera; +class Client; + +struct shadowFrustum +{ + float zNear{0.0f}; + float zFar{0.0f}; + float length{0.0f}; + core::matrix4 ProjOrthMat; + core::matrix4 ViewMat; + v3f position; +}; + +class DirectionalLight +{ +public: + DirectionalLight(const u32 shadowMapResolution, + const v3f &position, + video::SColorf lightColor = video::SColor(0xffffffff), + f32 farValue = 100.0f); + ~DirectionalLight() = default; + + //DISABLE_CLASS_COPY(DirectionalLight) + + void update_frustum(const Camera *cam, Client *client); + + // when set direction is updated to negative normalized(direction) + void setDirection(v3f dir); + v3f getDirection() const{ + return direction; + }; + v3f getPosition() const; + + /// Gets the light's matrices. + const core::matrix4 &getViewMatrix() const; + const core::matrix4 &getProjectionMatrix() const; + core::matrix4 getViewProjMatrix(); + + /// Gets the light's far value. + f32 getMaxFarValue() const + { + return farPlane; + } + + + /// Gets the light's color. + const video::SColorf &getLightColor() const + { + return diffuseColor; + } + + /// Sets the light's color. + void setLightColor(const video::SColorf &lightColor) + { + diffuseColor = lightColor; + } + + /// Gets the shadow map resolution for this light. + u32 getMapResolution() const + { + return mapRes; + } + + bool should_update_map_shadow{true}; + +private: + void createSplitMatrices(const Camera *cam); + + video::SColorf diffuseColor; + + f32 farPlane; + u32 mapRes; + + v3f pos; + v3f direction{0}; + shadowFrustum shadow_frustum; +}; diff --git a/src/client/shadows/dynamicshadowsrender.cpp b/src/client/shadows/dynamicshadowsrender.cpp new file mode 100644 index 000000000..135c9f895 --- /dev/null +++ b/src/client/shadows/dynamicshadowsrender.cpp @@ -0,0 +1,539 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include +#include "client/shadows/dynamicshadowsrender.h" +#include "client/shadows/shadowsScreenQuad.h" +#include "client/shadows/shadowsshadercallbacks.h" +#include "settings.h" +#include "filesys.h" +#include "util/string.h" +#include "client/shader.h" +#include "client/client.h" +#include "client/clientmap.h" + +ShadowRenderer::ShadowRenderer(IrrlichtDevice *device, Client *client) : + m_device(device), m_smgr(device->getSceneManager()), + m_driver(device->getVideoDriver()), m_client(client) +{ + m_shadows_enabled = true; + + m_shadow_strength = g_settings->getFloat("shadow_strength"); + + m_shadow_map_max_distance = g_settings->getFloat("shadow_map_max_distance"); + + m_shadow_map_texture_size = g_settings->getFloat("shadow_map_texture_size"); + + m_shadow_map_texture_32bit = g_settings->getBool("shadow_map_texture_32bit"); + m_shadow_map_colored = g_settings->getBool("shadow_map_color"); + m_shadow_samples = g_settings->getS32("shadow_filters"); + m_update_delta = g_settings->getFloat("shadow_update_time"); +} + +ShadowRenderer::~ShadowRenderer() +{ + if (m_shadow_depth_cb) + delete m_shadow_depth_cb; + if (m_shadow_mix_cb) + delete m_shadow_mix_cb; + m_shadow_node_array.clear(); + m_light_list.clear(); + + if (shadowMapTextureDynamicObjects) + m_driver->removeTexture(shadowMapTextureDynamicObjects); + + if (shadowMapTextureFinal) + m_driver->removeTexture(shadowMapTextureFinal); + + if (shadowMapTextureColors) + m_driver->removeTexture(shadowMapTextureColors); + + if (shadowMapClientMap) + m_driver->removeTexture(shadowMapClientMap); +} + +void ShadowRenderer::initialize() +{ + auto *gpu = m_driver->getGPUProgrammingServices(); + + // we need glsl + if (m_shadows_enabled && gpu && m_driver->queryFeature(video::EVDF_ARB_GLSL)) { + createShaders(); + } else { + m_shadows_enabled = false; + + warningstream << "Shadows: GLSL Shader not supported on this system." + << std::endl; + return; + } + + m_texture_format = m_shadow_map_texture_32bit + ? video::ECOLOR_FORMAT::ECF_R32F + : video::ECOLOR_FORMAT::ECF_R16F; + + m_texture_format_color = m_shadow_map_texture_32bit + ? video::ECOLOR_FORMAT::ECF_G32R32F + : video::ECOLOR_FORMAT::ECF_G16R16F; +} + + +float ShadowRenderer::getUpdateDelta() const +{ + return m_update_delta; +} + +size_t ShadowRenderer::addDirectionalLight() +{ + m_light_list.emplace_back(m_shadow_map_texture_size, + v3f(0.f, 0.f, 0.f), + video::SColor(255, 255, 255, 255), m_shadow_map_max_distance); + return m_light_list.size() - 1; +} + +DirectionalLight &ShadowRenderer::getDirectionalLight(u32 index) +{ + return m_light_list[index]; +} + +size_t ShadowRenderer::getDirectionalLightCount() const +{ + return m_light_list.size(); +} + +f32 ShadowRenderer::getMaxShadowFar() const +{ + if (!m_light_list.empty()) { + float wanted_range = m_client->getEnv().getClientMap().getWantedRange(); + + float zMax = m_light_list[0].getMaxFarValue() > wanted_range + ? wanted_range + : m_light_list[0].getMaxFarValue(); + return zMax * MAP_BLOCKSIZE; + } + return 0.0f; +} + +void ShadowRenderer::addNodeToShadowList( + scene::ISceneNode *node, E_SHADOW_MODE shadowMode) +{ + m_shadow_node_array.emplace_back(NodeToApply(node, shadowMode)); +} + +void ShadowRenderer::removeNodeFromShadowList(scene::ISceneNode *node) +{ + for (auto it = m_shadow_node_array.begin(); it != m_shadow_node_array.end();) { + if (it->node == node) { + it = m_shadow_node_array.erase(it); + break; + } else { + ++it; + } + } +} + +void ShadowRenderer::setClearColor(video::SColor ClearColor) +{ + m_clear_color = ClearColor; +} + +void ShadowRenderer::update(video::ITexture *outputTarget) +{ + if (!m_shadows_enabled || m_smgr->getActiveCamera() == nullptr) { + m_smgr->drawAll(); + return; + } + + if (!shadowMapTextureDynamicObjects) { + + shadowMapTextureDynamicObjects = getSMTexture( + std::string("shadow_dynamic_") + itos(m_shadow_map_texture_size), + m_texture_format, true); + } + + if (!shadowMapClientMap) { + + shadowMapClientMap = getSMTexture( + std::string("shadow_clientmap_") + itos(m_shadow_map_texture_size), + m_shadow_map_colored ? m_texture_format_color : m_texture_format, + true); + } + + if (m_shadow_map_colored && !shadowMapTextureColors) { + shadowMapTextureColors = getSMTexture( + std::string("shadow_colored_") + itos(m_shadow_map_texture_size), + m_shadow_map_colored ? m_texture_format_color : m_texture_format, + true); + } + + // The merge all shadowmaps texture + if (!shadowMapTextureFinal) { + video::ECOLOR_FORMAT frt; + if (m_shadow_map_texture_32bit) { + if (m_shadow_map_colored) + frt = video::ECOLOR_FORMAT::ECF_A32B32G32R32F; + else + frt = video::ECOLOR_FORMAT::ECF_R32F; + } else { + if (m_shadow_map_colored) + frt = video::ECOLOR_FORMAT::ECF_A16B16G16R16F; + else + frt = video::ECOLOR_FORMAT::ECF_R16F; + } + shadowMapTextureFinal = getSMTexture( + std::string("shadowmap_final_") + itos(m_shadow_map_texture_size), + frt, true); + } + + if (!m_shadow_node_array.empty() && !m_light_list.empty()) { + // for every directional light: + for (DirectionalLight &light : m_light_list) { + // Static shader values. + m_shadow_depth_cb->MapRes = (f32)m_shadow_map_texture_size; + m_shadow_depth_cb->MaxFar = (f32)m_shadow_map_max_distance * BS; + + // set the Render Target + // right now we can only render in usual RTT, not + // Depth texture is available in irrlicth maybe we + // should put some gl* fn here + + if (light.should_update_map_shadow) { + light.should_update_map_shadow = false; + + m_driver->setRenderTarget(shadowMapClientMap, true, true, + video::SColor(255, 255, 255, 255)); + renderShadowMap(shadowMapClientMap, light); + + if (m_shadow_map_colored) { + m_driver->setRenderTarget(shadowMapTextureColors, + true, false, video::SColor(255, 255, 255, 255)); + } + renderShadowMap(shadowMapTextureColors, light, + scene::ESNRP_TRANSPARENT); + m_driver->setRenderTarget(0, false, false); + } + + // render shadows for the n0n-map objects. + m_driver->setRenderTarget(shadowMapTextureDynamicObjects, true, + true, video::SColor(255, 255, 255, 255)); + renderShadowObjects(shadowMapTextureDynamicObjects, light); + // clear the Render Target + m_driver->setRenderTarget(0, false, false); + + // in order to avoid too many map shadow renders, + // we should make a second pass to mix clientmap shadows and + // entities shadows :( + m_screen_quad->getMaterial().setTexture(0, shadowMapClientMap); + // dynamic objs shadow texture. + if (m_shadow_map_colored) + m_screen_quad->getMaterial().setTexture(1, shadowMapTextureColors); + m_screen_quad->getMaterial().setTexture(2, shadowMapTextureDynamicObjects); + + m_driver->setRenderTarget(shadowMapTextureFinal, false, false, + video::SColor(255, 255, 255, 255)); + m_screen_quad->render(m_driver); + m_driver->setRenderTarget(0, false, false); + + } // end for lights + + // now render the actual MT render pass + m_driver->setRenderTarget(outputTarget, true, true, m_clear_color); + m_smgr->drawAll(); + + /* this code just shows shadows textures in screen and in ONLY for debugging*/ + #if 0 + // this is debug, ignore for now. + m_driver->draw2DImage(shadowMapTextureFinal, + core::rect(0, 50, 128, 128 + 50), + core::rect({0, 0}, shadowMapTextureFinal->getSize())); + + m_driver->draw2DImage(shadowMapClientMap, + core::rect(0, 50 + 128, 128, 128 + 50 + 128), + core::rect({0, 0}, shadowMapTextureFinal->getSize())); + m_driver->draw2DImage(shadowMapTextureDynamicObjects, + core::rect(0, 128 + 50 + 128, 128, + 128 + 50 + 128 + 128), + core::rect({0, 0}, shadowMapTextureDynamicObjects->getSize())); + + if (m_shadow_map_colored) { + + m_driver->draw2DImage(shadowMapTextureColors, + core::rect(128,128 + 50 + 128 + 128, + 128 + 128, 128 + 50 + 128 + 128 + 128), + core::rect({0, 0}, shadowMapTextureColors->getSize())); + } + #endif + m_driver->setRenderTarget(0, false, false); + } +} + + +video::ITexture *ShadowRenderer::getSMTexture(const std::string &shadow_map_name, + video::ECOLOR_FORMAT texture_format, bool force_creation) +{ + if (force_creation) { + return m_driver->addRenderTargetTexture( + core::dimension2du(m_shadow_map_texture_size, + m_shadow_map_texture_size), + shadow_map_name.c_str(), texture_format); + } + + return m_driver->getTexture(shadow_map_name.c_str()); +} + +void ShadowRenderer::renderShadowMap(video::ITexture *target, + DirectionalLight &light, scene::E_SCENE_NODE_RENDER_PASS pass) +{ + m_driver->setTransform(video::ETS_VIEW, light.getViewMatrix()); + m_driver->setTransform(video::ETS_PROJECTION, light.getProjectionMatrix()); + + // Operate on the client map + for (const auto &shadow_node : m_shadow_node_array) { + if (strcmp(shadow_node.node->getName(), "ClientMap") != 0) + continue; + + ClientMap *map_node = static_cast(shadow_node.node); + + video::SMaterial material; + if (map_node->getMaterialCount() > 0) { + // we only want the first material, which is the one with the albedo info + material = map_node->getMaterial(0); + } + + material.BackfaceCulling = false; + material.FrontfaceCulling = true; + material.PolygonOffsetFactor = 4.0f; + material.PolygonOffsetDirection = video::EPO_BACK; + //material.PolygonOffsetDepthBias = 1.0f/4.0f; + //material.PolygonOffsetSlopeScale = -1.f; + + if (m_shadow_map_colored && pass != scene::ESNRP_SOLID) + material.MaterialType = (video::E_MATERIAL_TYPE) depth_shader_trans; + else + material.MaterialType = (video::E_MATERIAL_TYPE) depth_shader; + + // FIXME: I don't think this is needed here + map_node->OnAnimate(m_device->getTimer()->getTime()); + + m_driver->setTransform(video::ETS_WORLD, + map_node->getAbsoluteTransformation()); + + map_node->renderMapShadows(m_driver, material, pass); + break; + } +} + +void ShadowRenderer::renderShadowObjects( + video::ITexture *target, DirectionalLight &light) +{ + m_driver->setTransform(video::ETS_VIEW, light.getViewMatrix()); + m_driver->setTransform(video::ETS_PROJECTION, light.getProjectionMatrix()); + + for (const auto &shadow_node : m_shadow_node_array) { + // we only take care of the shadow casters + if (shadow_node.shadowMode == ESM_RECEIVE || + strcmp(shadow_node.node->getName(), "ClientMap") == 0) + continue; + + // render other objects + u32 n_node_materials = shadow_node.node->getMaterialCount(); + std::vector BufferMaterialList; + std::vector> BufferMaterialCullingList; + BufferMaterialList.reserve(n_node_materials); + BufferMaterialCullingList.reserve(n_node_materials); + + // backup materialtype for each material + // (aka shader) + // and replace it by our "depth" shader + for (u32 m = 0; m < n_node_materials; m++) { + auto ¤t_mat = shadow_node.node->getMaterial(m); + + BufferMaterialList.push_back(current_mat.MaterialType); + current_mat.MaterialType = + (video::E_MATERIAL_TYPE)depth_shader; + + current_mat.setTexture(3, shadowMapTextureFinal); + + BufferMaterialCullingList.emplace_back( + (bool)current_mat.BackfaceCulling, (bool)current_mat.FrontfaceCulling); + + current_mat.BackfaceCulling = true; + current_mat.FrontfaceCulling = false; + current_mat.PolygonOffsetFactor = 1.0f/2048.0f; + current_mat.PolygonOffsetDirection = video::EPO_BACK; + //current_mat.PolygonOffsetDepthBias = 1.0 * 2.8e-6; + //current_mat.PolygonOffsetSlopeScale = -1.f; + } + + m_driver->setTransform(video::ETS_WORLD, + shadow_node.node->getAbsoluteTransformation()); + shadow_node.node->render(); + + // restore the material. + + for (u32 m = 0; m < n_node_materials; m++) { + auto ¤t_mat = shadow_node.node->getMaterial(m); + + current_mat.MaterialType = (video::E_MATERIAL_TYPE) BufferMaterialList[m]; + + current_mat.BackfaceCulling = BufferMaterialCullingList[m].first; + current_mat.FrontfaceCulling = BufferMaterialCullingList[m].second; + } + + } // end for caster shadow nodes +} + +void ShadowRenderer::mixShadowsQuad() +{ +} + +/* + * @Liso's disclaimer ;) This function loads the Shadow Mapping Shaders. + * I used a custom loader because I couldn't figure out how to use the base + * Shaders system with custom IShaderConstantSetCallBack without messing up the + * code too much. If anyone knows how to integrate this with the standard MT + * shaders, please feel free to change it. + */ + +void ShadowRenderer::createShaders() +{ + video::IGPUProgrammingServices *gpu = m_driver->getGPUProgrammingServices(); + + if (depth_shader == -1) { + std::string depth_shader_vs = getShaderPath("shadow_shaders", "pass1_vertex.glsl"); + if (depth_shader_vs.empty()) { + m_shadows_enabled = false; + errorstream << "Error shadow mapping vs shader not found." << std::endl; + return; + } + std::string depth_shader_fs = getShaderPath("shadow_shaders", "pass1_fragment.glsl"); + if (depth_shader_fs.empty()) { + m_shadows_enabled = false; + errorstream << "Error shadow mapping fs shader not found." << std::endl; + return; + } + m_shadow_depth_cb = new ShadowDepthShaderCB(); + + depth_shader = gpu->addHighLevelShaderMaterial( + readShaderFile(depth_shader_vs).c_str(), "vertexMain", + video::EVST_VS_1_1, + readShaderFile(depth_shader_fs).c_str(), "pixelMain", + video::EPST_PS_1_2, m_shadow_depth_cb); + + if (depth_shader == -1) { + // upsi, something went wrong loading shader. + delete m_shadow_depth_cb; + m_shadows_enabled = false; + errorstream << "Error compiling shadow mapping shader." << std::endl; + return; + } + + // HACK, TODO: investigate this better + // Grab the material renderer once more so minetest doesn't crash + // on exit + m_driver->getMaterialRenderer(depth_shader)->grab(); + } + + if (mixcsm_shader == -1) { + std::string depth_shader_vs = getShaderPath("shadow_shaders", "pass2_vertex.glsl"); + if (depth_shader_vs.empty()) { + m_shadows_enabled = false; + errorstream << "Error cascade shadow mapping fs shader not found." << std::endl; + return; + } + + std::string depth_shader_fs = getShaderPath("shadow_shaders", "pass2_fragment.glsl"); + if (depth_shader_fs.empty()) { + m_shadows_enabled = false; + errorstream << "Error cascade shadow mapping fs shader not found." << std::endl; + return; + } + m_shadow_mix_cb = new shadowScreenQuadCB(); + m_screen_quad = new shadowScreenQuad(); + mixcsm_shader = gpu->addHighLevelShaderMaterial( + readShaderFile(depth_shader_vs).c_str(), "vertexMain", + video::EVST_VS_1_1, + readShaderFile(depth_shader_fs).c_str(), "pixelMain", + video::EPST_PS_1_2, m_shadow_mix_cb); + + m_screen_quad->getMaterial().MaterialType = + (video::E_MATERIAL_TYPE)mixcsm_shader; + + if (mixcsm_shader == -1) { + // upsi, something went wrong loading shader. + delete m_shadow_mix_cb; + delete m_screen_quad; + m_shadows_enabled = false; + errorstream << "Error compiling cascade shadow mapping shader." << std::endl; + return; + } + + // HACK, TODO: investigate this better + // Grab the material renderer once more so minetest doesn't crash + // on exit + m_driver->getMaterialRenderer(mixcsm_shader)->grab(); + } + + if (m_shadow_map_colored && depth_shader_trans == -1) { + std::string depth_shader_vs = getShaderPath("shadow_shaders", "pass1_trans_vertex.glsl"); + if (depth_shader_vs.empty()) { + m_shadows_enabled = false; + errorstream << "Error shadow mapping vs shader not found." << std::endl; + return; + } + std::string depth_shader_fs = getShaderPath("shadow_shaders", "pass1_trans_fragment.glsl"); + if (depth_shader_fs.empty()) { + m_shadows_enabled = false; + errorstream << "Error shadow mapping fs shader not found." << std::endl; + return; + } + m_shadow_depth_trans_cb = new ShadowDepthShaderCB(); + + depth_shader_trans = gpu->addHighLevelShaderMaterial( + readShaderFile(depth_shader_vs).c_str(), "vertexMain", + video::EVST_VS_1_1, + readShaderFile(depth_shader_fs).c_str(), "pixelMain", + video::EPST_PS_1_2, m_shadow_depth_trans_cb); + + if (depth_shader_trans == -1) { + // upsi, something went wrong loading shader. + delete m_shadow_depth_trans_cb; + m_shadow_map_colored = false; + m_shadows_enabled = false; + errorstream << "Error compiling colored shadow mapping shader." << std::endl; + return; + } + + // HACK, TODO: investigate this better + // Grab the material renderer once more so minetest doesn't crash + // on exit + m_driver->getMaterialRenderer(depth_shader_trans)->grab(); + } +} + +std::string ShadowRenderer::readShaderFile(const std::string &path) +{ + std::string prefix; + if (m_shadow_map_colored) + prefix.append("#define COLORED_SHADOWS 1\n"); + + std::string content; + fs::ReadFile(path, content); + + return prefix + content; +} diff --git a/src/client/shadows/dynamicshadowsrender.h b/src/client/shadows/dynamicshadowsrender.h new file mode 100644 index 000000000..e633bd4f7 --- /dev/null +++ b/src/client/shadows/dynamicshadowsrender.h @@ -0,0 +1,146 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once + +#include +#include +#include "irrlichttypes_extrabloated.h" +#include "client/shadows/dynamicshadows.h" + +class ShadowDepthShaderCB; +class shadowScreenQuad; +class shadowScreenQuadCB; + +enum E_SHADOW_MODE : u8 +{ + ESM_RECEIVE = 0, + ESM_BOTH, +}; + +struct NodeToApply +{ + NodeToApply(scene::ISceneNode *n, + E_SHADOW_MODE m = E_SHADOW_MODE::ESM_BOTH) : + node(n), + shadowMode(m){}; + bool operator<(const NodeToApply &other) const { return node < other.node; }; + + scene::ISceneNode *node; + + E_SHADOW_MODE shadowMode{E_SHADOW_MODE::ESM_BOTH}; + bool dirty{false}; +}; + +class ShadowRenderer +{ +public: + ShadowRenderer(IrrlichtDevice *device, Client *client); + + ~ShadowRenderer(); + + void initialize(); + + /// Adds a directional light shadow map (Usually just one (the sun) except in + /// Tattoine ). + size_t addDirectionalLight(); + DirectionalLight &getDirectionalLight(u32 index = 0); + size_t getDirectionalLightCount() const; + f32 getMaxShadowFar() const; + + float getUpdateDelta() const; + /// Adds a shadow to the scene node. + /// The shadow mode can be ESM_BOTH, or ESM_RECEIVE. + /// ESM_BOTH casts and receives shadows + /// ESM_RECEIVE only receives but does not cast shadows. + /// + void addNodeToShadowList(scene::ISceneNode *node, + E_SHADOW_MODE shadowMode = ESM_BOTH); + void removeNodeFromShadowList(scene::ISceneNode *node); + + void setClearColor(video::SColor ClearColor); + + void update(video::ITexture *outputTarget = nullptr); + + video::ITexture *get_texture() + { + return shadowMapTextureFinal; + } + + + bool is_active() const { return m_shadows_enabled; } + void setTimeOfDay(float isDay) { m_time_day = isDay; }; + + s32 getShadowSamples() const { return m_shadow_samples; } + float getShadowStrength() const { return m_shadow_strength; } + float getTimeOfDay() const { return m_time_day; } + +private: + video::ITexture *getSMTexture(const std::string &shadow_map_name, + video::ECOLOR_FORMAT texture_format, + bool force_creation = false); + + void renderShadowMap(video::ITexture *target, DirectionalLight &light, + scene::E_SCENE_NODE_RENDER_PASS pass = + scene::ESNRP_SOLID); + void renderShadowObjects(video::ITexture *target, DirectionalLight &light); + void mixShadowsQuad(); + + // a bunch of variables + IrrlichtDevice *m_device{nullptr}; + scene::ISceneManager *m_smgr{nullptr}; + video::IVideoDriver *m_driver{nullptr}; + Client *m_client{nullptr}; + video::ITexture *shadowMapClientMap{nullptr}; + video::ITexture *shadowMapTextureFinal{nullptr}; + video::ITexture *shadowMapTextureDynamicObjects{nullptr}; + video::ITexture *shadowMapTextureColors{nullptr}; + video::SColor m_clear_color{0x0}; + + std::vector m_light_list; + std::vector m_shadow_node_array; + + float m_shadow_strength; + float m_shadow_map_max_distance; + float m_shadow_map_texture_size; + float m_time_day{0.0f}; + float m_update_delta; + int m_shadow_samples; + bool m_shadow_map_texture_32bit; + bool m_shadows_enabled; + bool m_shadow_map_colored; + + video::ECOLOR_FORMAT m_texture_format{video::ECOLOR_FORMAT::ECF_R16F}; + video::ECOLOR_FORMAT m_texture_format_color{video::ECOLOR_FORMAT::ECF_R16G16}; + + // Shadow Shader stuff + + void createShaders(); + std::string readShaderFile(const std::string &path); + + s32 depth_shader{-1}; + s32 depth_shader_trans{-1}; + s32 mixcsm_shader{-1}; + + ShadowDepthShaderCB *m_shadow_depth_cb{nullptr}; + ShadowDepthShaderCB *m_shadow_depth_trans_cb{nullptr}; + + shadowScreenQuad *m_screen_quad{nullptr}; + shadowScreenQuadCB *m_shadow_mix_cb{nullptr}; +}; diff --git a/src/client/shadows/shadowsScreenQuad.cpp b/src/client/shadows/shadowsScreenQuad.cpp new file mode 100644 index 000000000..c36ee0d60 --- /dev/null +++ b/src/client/shadows/shadowsScreenQuad.cpp @@ -0,0 +1,67 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "shadowsScreenQuad.h" + +shadowScreenQuad::shadowScreenQuad() +{ + Material.Wireframe = false; + Material.Lighting = false; + + video::SColor color(0x0); + Vertices[0] = video::S3DVertex( + -1.0f, -1.0f, 0.0f, 0, 0, 1, color, 0.0f, 1.0f); + Vertices[1] = video::S3DVertex( + -1.0f, 1.0f, 0.0f, 0, 0, 1, color, 0.0f, 0.0f); + Vertices[2] = video::S3DVertex( + 1.0f, 1.0f, 0.0f, 0, 0, 1, color, 1.0f, 0.0f); + Vertices[3] = video::S3DVertex( + 1.0f, -1.0f, 0.0f, 0, 0, 1, color, 1.0f, 1.0f); + Vertices[4] = video::S3DVertex( + -1.0f, -1.0f, 0.0f, 0, 0, 1, color, 0.0f, 1.0f); + Vertices[5] = video::S3DVertex( + 1.0f, 1.0f, 0.0f, 0, 0, 1, color, 1.0f, 0.0f); +} + +void shadowScreenQuad::render(video::IVideoDriver *driver) +{ + u16 indices[6] = {0, 1, 2, 3, 4, 5}; + driver->setMaterial(Material); + driver->setTransform(video::ETS_WORLD, core::matrix4()); + driver->drawIndexedTriangleList(&Vertices[0], 6, &indices[0], 2); +} + +void shadowScreenQuadCB::OnSetConstants( + video::IMaterialRendererServices *services, s32 userData) +{ + s32 TextureId = 0; + services->setPixelShaderConstant( + services->getPixelShaderConstantID("ShadowMapClientMap"), + &TextureId, 1); + + TextureId = 1; + services->setPixelShaderConstant( + services->getPixelShaderConstantID("ShadowMapClientMapTraslucent"), + &TextureId, 1); + + TextureId = 2; + services->setPixelShaderConstant( + services->getPixelShaderConstantID("ShadowMapSamplerdynamic"), + &TextureId, 1); +} diff --git a/src/client/shadows/shadowsScreenQuad.h b/src/client/shadows/shadowsScreenQuad.h new file mode 100644 index 000000000..e6cc95957 --- /dev/null +++ b/src/client/shadows/shadowsScreenQuad.h @@ -0,0 +1,45 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once +#include "irrlichttypes_extrabloated.h" +#include +#include + +class shadowScreenQuad +{ +public: + shadowScreenQuad(); + + void render(video::IVideoDriver *driver); + video::SMaterial &getMaterial() { return Material; } + +private: + video::S3DVertex Vertices[6]; + video::SMaterial Material; +}; + +class shadowScreenQuadCB : public video::IShaderConstantSetCallBack +{ +public: + shadowScreenQuadCB(){}; + + virtual void OnSetConstants(video::IMaterialRendererServices *services, + s32 userData); +}; diff --git a/src/client/shadows/shadowsshadercallbacks.cpp b/src/client/shadows/shadowsshadercallbacks.cpp new file mode 100644 index 000000000..2f5797084 --- /dev/null +++ b/src/client/shadows/shadowsshadercallbacks.cpp @@ -0,0 +1,44 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "client/shadows/shadowsshadercallbacks.h" + +void ShadowDepthShaderCB::OnSetConstants( + video::IMaterialRendererServices *services, s32 userData) +{ + video::IVideoDriver *driver = services->getVideoDriver(); + + core::matrix4 lightMVP = driver->getTransform(video::ETS_PROJECTION); + lightMVP *= driver->getTransform(video::ETS_VIEW); + lightMVP *= driver->getTransform(video::ETS_WORLD); + + services->setVertexShaderConstant( + services->getPixelShaderConstantID("LightMVP"), + lightMVP.pointer(), 16); + + services->setVertexShaderConstant( + services->getPixelShaderConstantID("MapResolution"), &MapRes, 1); + services->setVertexShaderConstant( + services->getPixelShaderConstantID("MaxFar"), &MaxFar, 1); + + s32 TextureId = 0; + services->setPixelShaderConstant( + services->getPixelShaderConstantID("ColorMapSampler"), &TextureId, + 1); +} diff --git a/src/client/shadows/shadowsshadercallbacks.h b/src/client/shadows/shadowsshadercallbacks.h new file mode 100644 index 000000000..43ad489f2 --- /dev/null +++ b/src/client/shadows/shadowsshadercallbacks.h @@ -0,0 +1,34 @@ +/* +Minetest +Copyright (C) 2021 Liso + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once +#include "irrlichttypes_extrabloated.h" +#include +#include + +class ShadowDepthShaderCB : public video::IShaderConstantSetCallBack +{ +public: + void OnSetMaterial(const video::SMaterial &material) override {} + + void OnSetConstants(video::IMaterialRendererServices *services, + s32 userData) override; + + f32 MaxFar{2048.0f}, MapRes{1024.0f}; +}; -- cgit v1.2.3