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-rw-r--r--src/client/shadows/dynamicshadows.cpp145
-rw-r--r--src/client/shadows/dynamicshadows.h102
-rw-r--r--src/client/shadows/dynamicshadowsrender.cpp539
-rw-r--r--src/client/shadows/dynamicshadowsrender.h146
-rw-r--r--src/client/shadows/shadowsScreenQuad.cpp67
-rw-r--r--src/client/shadows/shadowsScreenQuad.h45
-rw-r--r--src/client/shadows/shadowsshadercallbacks.cpp44
-rw-r--r--src/client/shadows/shadowsshadercallbacks.h34
8 files changed, 1122 insertions, 0 deletions
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 <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 <cmath>
+
+#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 <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.
+*/
+
+#pragma once
+
+#include "irrlichttypes_bloated.h"
+#include <matrix4.h>
+#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 <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 &current_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 &current_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 <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.
+*/
+
+#pragma once
+
+#include <string>
+#include <vector>
+#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<DirectionalLight> m_light_list;
+ std::vector<NodeToApply> 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 <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 "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 <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.
+*/
+
+#pragma once
+#include "irrlichttypes_extrabloated.h"
+#include <IMaterialRendererServices.h>
+#include <IShaderConstantSetCallBack.h>
+
+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 <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 "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 <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.
+*/
+
+#pragma once
+#include "irrlichttypes_extrabloated.h"
+#include <IMaterialRendererServices.h>
+#include <IShaderConstantSetCallBack.h>
+
+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};
+};