Shadow mapping render pass (#11244)

Co-authored-by: x2048 <codeforsmile@gmail.com>

1 files changed, 67 insertions, 0 deletions

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);
+}