Normal maps generation on the fly.

Parallax mapping with slope information.
Overriding normal maps.

4 files changed, 80 insertions, 30 deletions

diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index 6b291bd2b..b08d79aee 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -130,8 +130,11 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("preload_item_visuals", "true");
 	settings->setDefault("enable_bumpmapping", "false");
 	settings->setDefault("enable_parallax_occlusion", "false");
-	settings->setDefault("parallax_occlusion_scale", "0.08");
-	settings->setDefault("parallax_occlusion_bias", "0.04");
+	settings->setDefault("generate_normalmaps", "false");
+	settings->setDefault("normalmaps_strength", "0.6");
+	settings->setDefault("normalmaps_smooth", "1");
+	settings->setDefault("parallax_occlusion_scale", "0.06");
+	settings->setDefault("parallax_occlusion_bias", "0.03");
 	settings->setDefault("enable_waving_water", "false");
 	settings->setDefault("water_wave_height", "1.0");
 	settings->setDefault("water_wave_length", "20.0");
diff --git a/src/game.cpp b/src/game.cpp
index 0a9dcfdae..761f65f83 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -858,14 +858,17 @@ public:
 		services->setPixelShaderConstant("eyePosition", (irr::f32*)&eye_position, 3);
 		services->setVertexShaderConstant("eyePosition", (irr::f32*)&eye_position, 3);
 
-		// Normal map texture layer
+		// Uniform sampler layers
+		int layer0 = 0;
 		int layer1 = 1;
 		int layer2 = 2;
 		// before 1.8 there isn't a "integer interface", only float
 #if (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 8)
+		services->setPixelShaderConstant("baseTexture" , (irr::f32*)&layer0, 1);
 		services->setPixelShaderConstant("normalTexture" , (irr::f32*)&layer1, 1);
 		services->setPixelShaderConstant("useNormalmap" , (irr::f32*)&layer2, 1);
 #else
+		services->setPixelShaderConstant("baseTexture" , (irr::s32*)&layer0, 1);
 		services->setPixelShaderConstant("normalTexture" , (irr::s32*)&layer1, 1);
 		services->setPixelShaderConstant("useNormalmap" , (irr::s32*)&layer2, 1);
 #endif
diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index ef05acbb7..9cd99fcb7 100644
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -1212,20 +1212,25 @@ MapBlockMesh::MapBlockMesh(MeshMakeData *data, v3s16 camera_offset):
 			ITextureSource *tsrc = data->m_gamedef->tsrc();
 			material.setTexture(2, tsrc->getTexture("disable_img.png"));
 			if (enable_bumpmapping || enable_parallax_occlusion) {
-				std::string fname_base = tsrc->getTextureName(p.tile.texture_id);
-				std::string normal_ext = "_normal.png";
-				size_t pos = fname_base.find(".");
-				std::string fname_normal = fname_base.substr(0, pos) + normal_ext;
-
-				if (tsrc->isKnownSourceImage(fname_normal)) {
-					// look for image extension and replace it 
-					size_t i = 0;
-					while ((i = fname_base.find(".", i)) != std::string::npos) {
-						fname_base.replace(i, 4, normal_ext);
-						i += normal_ext.length();
-					}
-					material.setTexture(1, tsrc->getTexture(fname_base));
+				if (tsrc->isKnownSourceImage("override_normal.png")){
+					material.setTexture(1, tsrc->getTexture("override_normal.png"));
 					material.setTexture(2, tsrc->getTexture("enable_img.png"));
+				} else {
+					std::string fname_base = tsrc->getTextureName(p.tile.texture_id);
+					std::string normal_ext = "_normal.png";
+					size_t pos = fname_base.find(".");
+					std::string fname_normal = fname_base.substr(0, pos) + normal_ext;
+
+					if (tsrc->isKnownSourceImage(fname_normal)) {
+						// look for image extension and replace it 
+						size_t i = 0;
+						while ((i = fname_base.find(".", i)) != std::string::npos) {
+							fname_base.replace(i, 4, normal_ext);
+							i += normal_ext.length();
+						}
+						material.setTexture(1, tsrc->getTexture(fname_base));
+						material.setTexture(2, tsrc->getTexture("enable_img.png"));
+					}
 				}
 			}
 			p.tile.applyMaterialOptionsWithShaders(material,
@@ -1368,17 +1373,22 @@ bool MapBlockMesh::animate(bool faraway, float time, int crack, u32 daynight_rat
 		buf->getMaterial().setTexture(2, tsrc->getTexture("disable_img.png"));
 		if (enable_shaders && (enable_bumpmapping || enable_parallax_occlusion))
 			{
-				std::string fname_base,fname_normal;
-				fname_base = tsrc->getTextureName(tile.texture_id);
-				unsigned pos;
-				pos = fname_base.find(".");
-				fname_normal = fname_base.substr (0, pos);
-				fname_normal += "_normal.png";
-				if (tsrc->isKnownSourceImage(fname_normal)){
-					os.str("");
-					os<<fname_normal<<"^[verticalframe:"<<(int)tile.animation_frame_count<<":"<<frame;
-					buf->getMaterial().setTexture(1, tsrc->getTexture(os.str()));
+				if (tsrc->isKnownSourceImage("override_normal.png")){
+					buf->getMaterial().setTexture(1, tsrc->getTexture("override_normal.png"));
 					buf->getMaterial().setTexture(2, tsrc->getTexture("enable_img.png"));
+				} else {
+					std::string fname_base,fname_normal;
+					fname_base = tsrc->getTextureName(tile.texture_id);
+					unsigned pos;
+					pos = fname_base.find(".");
+					fname_normal = fname_base.substr (0, pos);
+					fname_normal += "_normal.png";
+					if (tsrc->isKnownSourceImage(fname_normal)){
+						os.str("");
+						os<<fname_normal<<"^[verticalframe:"<<(int)tile.animation_frame_count<<":"<<frame;
+						buf->getMaterial().setTexture(1, tsrc->getTexture(os.str()));
+						buf->getMaterial().setTexture(2, tsrc->getTexture("enable_img.png"));
+					}
 				}
 			}
 	}
diff --git a/src/shader.cpp b/src/shader.cpp
index d29c9d3a7..4006e256f 100644
--- a/src/shader.cpp
+++ b/src/shader.cpp
@@ -240,12 +240,20 @@ public:
 			services->setVertexShaderConstant(worldViewProj.pointer(), 4, 4);
 
 		// set transposed world matrix
+		core::matrix4 transWorld = driver->getTransform(video::ETS_WORLD);
+		transWorld = transWorld.getTransposed();
+		if(is_highlevel)
+			services->setVertexShaderConstant("mTransWorld", transWorld.pointer(), 16);
+		else
+			services->setVertexShaderConstant(transWorld.pointer(), 8, 4);
+
+		// set world matrix
 		core::matrix4 world = driver->getTransform(video::ETS_WORLD);
-		world = world.getTransposed();
 		if(is_highlevel)
-			services->setVertexShaderConstant("mTransWorld", world.pointer(), 16);
+			services->setVertexShaderConstant("mWorld", world.pointer(), 16);
 		else
 			services->setVertexShaderConstant(world.pointer(), 8, 4);
+
 	}
 
 private:
@@ -673,7 +681,33 @@ ShaderInfo generate_shader(std::string name, IrrlichtDevice *device,
 
 	// Create shaders header
 	std::string shaders_header = "#version 120\n";
-	
+
+	if (g_settings->getBool("generate_normalmaps")){
+		shaders_header += "#define GENERATE_NORMALMAPS\n";
+		shaders_header += "#define NORMALMAPS_STRENGTH ";
+		shaders_header += ftos(g_settings->getFloat("normalmaps_strength"));
+		shaders_header += "\n";
+		float sample_step;
+		int smooth = (int)g_settings->getFloat("normalmaps_smooth");
+		switch (smooth){
+		case 0:
+			sample_step = 0.0078125; // 1.0 / 128.0
+			break;
+		case 1:
+			sample_step = 0.00390625; // 1.0 / 256.0
+			break;
+		case 2:
+			sample_step = 0.001953125; // 1.0 / 512.0
+			break;
+		default:
+			sample_step = 0.0078125;
+			break;
+		}
+		shaders_header += "#define SAMPLE_STEP ";
+		shaders_header += ftos(sample_step);
+		shaders_header += "\n";
+	}
+
 	if (g_settings->getBool("enable_bumpmapping"))
 		shaders_header += "#define ENABLE_BUMPMAPPING\n";
 
@@ -685,7 +719,7 @@ ShaderInfo generate_shader(std::string name, IrrlichtDevice *device,
 		shaders_header += "#define PARALLAX_OCCLUSION_BIAS ";
 		shaders_header += ftos(g_settings->getFloat("parallax_occlusion_bias"));
 		shaders_header += "\n";
-		}
+	}
 
 	if (g_settings->getBool("enable_bumpmapping") || g_settings->getBool("enable_parallax_occlusion"))
 		shaders_header += "#define USE_NORMALMAPS\n";