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Diffstat (limited to 'src/client/shadows/dynamicshadowsrender.cpp')
| -rw-r--r-- | src/client/shadows/dynamicshadowsrender.cpp | 539 |
1 files changed, 539 insertions, 0 deletions
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 <anlismon@gmail.com> + +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 <cstring> +#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<s32>(0, 50, 128, 128 + 50), + core::rect<s32>({0, 0}, shadowMapTextureFinal->getSize())); + + m_driver->draw2DImage(shadowMapClientMap, + core::rect<s32>(0, 50 + 128, 128, 128 + 50 + 128), + core::rect<s32>({0, 0}, shadowMapTextureFinal->getSize())); + m_driver->draw2DImage(shadowMapTextureDynamicObjects, + core::rect<s32>(0, 128 + 50 + 128, 128, + 128 + 50 + 128 + 128), + core::rect<s32>({0, 0}, shadowMapTextureDynamicObjects->getSize())); + + if (m_shadow_map_colored) { + + m_driver->draw2DImage(shadowMapTextureColors, + core::rect<s32>(128,128 + 50 + 128 + 128, + 128 + 128, 128 + 50 + 128 + 128 + 128), + core::rect<s32>({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<ClientMap *>(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<s32> BufferMaterialList; + std::vector<std::pair<bool, bool>> 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; +} |