23 files changed, 224 insertions, 315 deletions
diff --git a/gfx/gl/shaders/basicShader.fs b/gfx/gl/shaders/basicShader.fs
index 24b2791..57eaba2 100644
--- a/gfx/gl/shaders/basicShader.fs
+++ b/gfx/gl/shaders/basicShader.fs
@@ -1,22 +1,54 @@
 #version 330 core
+#extension GL_ARB_shading_language_420pack : enable
 
-in vec3 FragPos;
-in vec2 TexCoords;
-in vec3 Normal;
-in vec4 Colour;
+include(`materialInterface.glsl')
+include(`geometryOut.glsl')
 
-out vec4 gPosition;
-out vec4 gNormal;
-out vec4 gAlbedoSpec;
+layout(binding = 0) uniform sampler2D texture0;
+layout(binding = 1) uniform usampler2DRect material;
 
-uniform sampler2D texture0;
+float map(uint mapmode, float value)
+{
+	switch (mapmode) {
+		case 0u: // Repeat
+			return fract(value);
+		case 1u: // Clamp to edge
+			return clamp(0.0, 1.0, value);
+		case 2u: // Mirror
+			discard;
+		case 3u: // Decal
+			if (value != clamp(0.0, 1.0, value)) {
+				discard;
+			}
+	}
+	return 0;
+}
+
+vec2 map(uint mapmodeU, uint mapmodeV, vec2 value)
+{
+	return vec2(map(mapmodeU, value.x), map(mapmodeV, value.y));
+}
+
+vec4 getTextureColour(uint midx, vec2 uv)
+{
+	if (midx > 0u) {
+		const vec2 tSize = textureSize(texture0, 0);
+		const vec4 sPosSize = texture(material, uvec2(0, midx - 1u));
+		const uvec4 sMode = texture(material, uvec2(1, midx - 1u));
+		const uint mapmodeU = sMode.x & 0xFu;
+		const uint mapmodeV = (sMode.x & 0xF0u) >> 1;
+		uv = (sPosSize.xy + sPosSize.zw * map(mapmodeU, mapmodeV, uv)) / tSize;
+	}
+	return texture(texture0, uv);
+}
 
 void
 main()
 {
-	vec4 textureColour = texture(texture0, TexCoords);
-	float clear = round(mix(textureColour.a, 1, Colour.a));
-	gPosition = vec4(FragPos, clear);
-	gNormal = vec4(Normal, clear);
+	vec4 textureColour = getTextureColour(Material, TexCoords);
+	float opaque = step(0.5, mix(textureColour.a, 1, Colour.a));
+	gPosition = vec4(FragPos, opaque);
+	gNormal = vec4(Normal, opaque);
+	gl_FragDepth = mix(1.0, gl_FragCoord.z, opaque);
 	gAlbedoSpec = mix(textureColour, vec4(Colour.rgb, 1), Colour.a);
 }
diff --git a/gfx/gl/shaders/basicShader.vs b/gfx/gl/shaders/basicShader.vs
index ff9a401..e1701ed 100644
--- a/gfx/gl/shaders/basicShader.vs
+++ b/gfx/gl/shaders/basicShader.vs
@@ -1,14 +1,7 @@
 #version 330 core
 
-in vec3 position;
-in vec2 texCoord;
-in vec3 normal;
-in vec4 colour;
-
-out vec3 FragPos;
-out vec2 TexCoords;
-out vec3 Normal;
-out vec4 Colour;
+include(`meshIn.glsl')
+include(`materialInterface.glsl')
 
 uniform mat4 viewProjection;
 uniform mat4 model;
@@ -22,6 +15,7 @@ main()
 	TexCoords = texCoord;
 	Normal = (model * vec4(normal, 0.0)).xyz;
 	Colour = colour;
+	Material = material;
 
 	gl_Position = viewProjection * worldPos;
 }
diff --git a/gfx/gl/shaders/geometryOut.glsl b/gfx/gl/shaders/geometryOut.glsl
new file mode 100644
index 0000000..dc5f8e8
--- /dev/null
+++ b/gfx/gl/shaders/geometryOut.glsl
@@ -0,0 +1,3 @@
+layout(location = 0) out vec4 gPosition;
+layout(location = 1) out vec4 gNormal;
+layout(location = 2) out vec4 gAlbedoSpec;
diff --git a/gfx/gl/shaders/landmassShader.fs b/gfx/gl/shaders/landmassShader.fs
index 7c08e8e..f3cc3e8 100644
--- a/gfx/gl/shaders/landmassShader.fs
+++ b/gfx/gl/shaders/landmassShader.fs
@@ -1,12 +1,7 @@
 #version 330 core
 
-in vec3 FragPos;
-in vec2 TexCoords;
-in vec3 Normal;
-
-layout(location = 0) out vec4 gPosition;
-layout(location = 1) out vec4 gNormal;
-layout(location = 2) out vec4 gAlbedoSpec;
+include(`materialInterface.glsl')
+include(`geometryOut.glsl')
 
 uniform sampler2D texture0;
 
diff --git a/gfx/gl/shaders/landmassShader.vs b/gfx/gl/shaders/landmassShader.vs
index 30c4ef4..0cc8153 100644
--- a/gfx/gl/shaders/landmassShader.vs
+++ b/gfx/gl/shaders/landmassShader.vs
@@ -1,14 +1,7 @@
 #version 330 core
 
-in vec3 position;
-in vec2 texCoord;
-in vec3 normal;
-in vec4 colour;
-
-out vec3 FragPos;
-out vec2 TexCoords;
-out vec3 Normal;
-out vec4 Colour;
+include(`meshIn.glsl')
+include(`materialInterface.glsl')
 
 uniform mat4 viewProjection;
 
@@ -19,6 +12,7 @@ main()
 	TexCoords = texCoord;
 	Normal = normal;
 	Colour = colour;
+	Material = material;
 
 	gl_Position = viewProjection * vec4(position, 1.0);
 }
diff --git a/gfx/gl/shaders/lightingShader.vs b/gfx/gl/shaders/lightingShader.vs
index 2271d2e..e07cd0a 100644
--- a/gfx/gl/shaders/lightingShader.vs
+++ b/gfx/gl/shaders/lightingShader.vs
@@ -1,6 +1,6 @@
 #version 330 core
 
-in vec4 position;
+in ivec4 position;
 
 out vec2 TexCoords;
 
diff --git a/gfx/gl/shaders/materialInterface.glsl b/gfx/gl/shaders/materialInterface.glsl
new file mode 100644
index 0000000..5735cf9
--- /dev/null
+++ b/gfx/gl/shaders/materialInterface.glsl
@@ -0,0 +1,7 @@
+ifelse(TYPE, .fs, in, out) vec3 FragPos;
+ifelse(TYPE, .fs, in, out) vec2 TexCoords;
+ifelse(TYPE, .fs, in, out) vec3 Normal;
+ifelse(TYPE, .fs, in, out) vec4 Colour;
+flat
+ifelse(TYPE, .fs, in, out)
+uint Material;
diff --git a/gfx/gl/shaders/meshIn.glsl b/gfx/gl/shaders/meshIn.glsl
new file mode 100644
index 0000000..dd84a10
--- /dev/null
+++ b/gfx/gl/shaders/meshIn.glsl
@@ -0,0 +1,5 @@
+layout(location = 0) in vec3 position;
+layout(location = 1) in vec2 texCoord;
+layout(location = 2) in vec3 normal;
+layout(location = 3) in vec4 colour;
+layout(location = 4) in uint material;
diff --git a/gfx/gl/shaders/shadowDynamicPoint.vs b/gfx/gl/shaders/shadowDynamicPoint.vs
index 6ea352f..531d8de 100644
--- a/gfx/gl/shaders/shadowDynamicPoint.vs
+++ b/gfx/gl/shaders/shadowDynamicPoint.vs
@@ -1,6 +1,6 @@
 #version 330 core
 
-in vec3 position;
+include(`meshIn.glsl')
 
 uniform mat4 viewProjection;
 uniform mat4 model;
diff --git a/gfx/gl/shaders/shadowFixedPoint.vs b/gfx/gl/shaders/shadowFixedPoint.vs
index 246890c..c9fa19b 100644
--- a/gfx/gl/shaders/shadowFixedPoint.vs
+++ b/gfx/gl/shaders/shadowFixedPoint.vs
@@ -1,6 +1,6 @@
 #version 330 core
 
-layout(location = 0) in vec3 position;
+include(`meshIn.glsl')
 
 uniform mat4 viewProjection;
 
diff --git a/gfx/gl/shaders/waterShader.fs b/gfx/gl/shaders/waterShader.fs
index d242566..5936da4 100644
--- a/gfx/gl/shaders/waterShader.fs
+++ b/gfx/gl/shaders/waterShader.fs
@@ -1,13 +1,8 @@
 #version 330 core
 #extension GL_ARB_shading_language_420pack : enable
 
-in vec3 FragPos;
-in vec2 TexCoords;
-in vec3 Normal;
-
-out vec4 gPosition;
-out vec4 gNormal;
-out vec4 gAlbedoSpec;
+include(`materialInterface.glsl')
+include(`geometryOut.glsl')
 
 uniform sampler2D texture0;
 uniform vec3 waves;
diff --git a/gfx/gl/shaders/waterShader.vs b/gfx/gl/shaders/waterShader.vs
index fe9206f..a21b49f 100644
--- a/gfx/gl/shaders/waterShader.vs
+++ b/gfx/gl/shaders/waterShader.vs
@@ -1,12 +1,7 @@
 #version 330 core
 
-in vec3 position;
-in vec2 texCoord;
-in vec3 normal;
-
-out vec3 FragPos;
-out vec2 TexCoords;
-out vec3 Normal;
+include(`meshIn.glsl')
+include(`materialInterface.glsl')
 
 uniform mat4 viewProjection;
 uniform vec3 waves;
diff --git a/gfx/gl/vertexArrayObject.hpp b/gfx/gl/vertexArrayObject.hpp
index c0273c0..5b9fc60 100644
--- a/gfx/gl/vertexArrayObject.hpp
+++ b/gfx/gl/vertexArrayObject.hpp
@@ -61,7 +61,7 @@ private:
 	{
 		glEnableVertexAttribArray(vertexArrayId);
 		using traits = gl_traits<T>;
-		glVertexAttribPointer(vertexArrayId, traits::size, traits::type, GL_FALSE, sizeof(Vertex), ptr);
+		traits::vertexAttribFunc(vertexArrayId, traits::size, traits::type, sizeof(Vertex), ptr);
 	}
 
 	template<auto Vertex::*attrib>
diff --git a/gfx/image.cpp b/gfx/image.cpp
index e3e3b01..fb86cb6 100644
--- a/gfx/image.cpp
+++ b/gfx/image.cpp
@@ -19,6 +19,22 @@ Image::Image(const char * fileName, int flags) : width {}, height {}, numCompone
 	data = {bytes, static_cast<size_t>(width * height * numComponents)};
 }
 
+Image::Image(std::span<unsigned char> buffer, int flags)
+{
+	stbi_set_flip_vertically_on_load(1);
+	int w, h, nc;
+	unsigned char * bytes = stbi_load_from_memory(buffer.data(), static_cast<int>(buffer.size()), &w, &h, &nc, flags);
+	width = static_cast<unsigned int>(w);
+	height = static_cast<unsigned int>(h);
+	numComponents = static_cast<unsigned int>(nc);
+
+	if (!bytes) {
+		throw std::runtime_error {"Unable to load image from memory buffer "};
+	}
+
+	data = {bytes, static_cast<size_t>(width * height * numComponents)};
+}
+
 Image::~Image()
 {
 	stbi_image_free(data.data());
diff --git a/gfx/image.h b/gfx/image.h
index 47437ca..97c2731 100644
--- a/gfx/image.h
+++ b/gfx/image.h
@@ -8,6 +8,7 @@ class Image {
 public:
 	Image(const char * fileName, int flags);
 	Image(const std::string & fileName, int flags) : Image(fileName.c_str(), flags) { }
+	Image(std::span<unsigned char> data, int flags);
 	~Image();
 
 	NO_COPY(Image);
diff --git a/gfx/models/mesh.cpp b/gfx/models/mesh.cpp
index 3db1ad5..2719211 100644
--- a/gfx/models/mesh.cpp
+++ b/gfx/models/mesh.cpp
@@ -7,7 +7,8 @@
 Mesh::Mesh(const std::span<const Vertex> vertices, const std::span<const unsigned int> indices, GLenum m) :
 	m_numIndices {static_cast<GLsizei>(indices.size())}, mode {m}
 {
-	VertexArrayObject<Vertex>::configure<&Vertex::pos, &Vertex::texCoord, &Vertex::normal, &Vertex::colour>(
+	VertexArrayObject<Vertex>::configure<&Vertex::pos, &Vertex::texCoord, &Vertex::normal, &Vertex::colour,
+			&Vertex::material>(
 			m_vertexArrayObject, m_vertexArrayBuffers[0], m_vertexArrayBuffers[1], vertices, indices);
 }
 
diff --git a/gfx/models/obj.h b/gfx/models/obj.h
deleted file mode 100644
index e28f7de..0000000
--- a/gfx/models/obj.h
+++ /dev/null
@@ -1,38 +0,0 @@
-#pragma once
-
-#ifndef yyFlexLexer
-#	define yyFlexLexer objbaseFlexLexer
-#	include <FlexLexer.h>
-#endif
-#include <filesystem>
-#include <fstream>
-#include <glm/glm.hpp>
-#include <map>
-#include <memory>
-#include <vector>
-
-class Mesh;
-class Vertex;
-
-class ObjParser : yyFlexLexer {
-public:
-	explicit ObjParser(const std::filesystem::path & fileName);
-	explicit ObjParser(std::unique_ptr<std::istream> in);
-
-	int yylex() override;
-
-	std::vector<glm::vec4> vertices;
-	std::vector<glm::vec3> texCoords;
-	std::vector<glm::vec3> normals;
-	using FaceElement = glm::vec<3, unsigned int>;
-	using Face = std::vector<FaceElement>;
-	using Faces = std::vector<Face>;
-	using Object = std::pair<std::string, Faces>;
-	std::vector<Object> objects;
-	glm::length_t axis {0};
-
-	using NamedMeshesData = std::map<std::string, std::pair<std::vector<Vertex>, std::vector<unsigned int>>>;
-	[[nodiscard]] NamedMeshesData createMeshData() const;
-	using NamedMeshes = std::map<std::string, std::shared_ptr<const Mesh>>;
-	[[nodiscard]] NamedMeshes createMeshes() const;
-};
diff --git a/gfx/models/obj.impl.cpp b/gfx/models/obj.impl.cpp
deleted file mode 100644
index 205abc8..0000000
--- a/gfx/models/obj.impl.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-#include "obj.h"
-#include <algorithm>
-#include <cassert>
-#include <filesystem>
-#include <fstream>
-#include <gfx/models/mesh.h> // IWYU pragma: keep
-#include <gfx/models/vertex.hpp>
-#include <glm/glm.hpp>
-#include <iterator>
-#include <map>
-#include <memory>
-#include <utility>
-#include <vector>
-
-ObjParser::ObjParser(const std::filesystem::path & fileName) : ObjParser {std::make_unique<std::ifstream>(fileName)} { }
-
-ObjParser::ObjParser(std::unique_ptr<std::istream> in) : yyFlexLexer(in.get())
-{
-	assert(in);
-	ObjParser::yylex();
-	assert(in->good());
-	constexpr const glm::mat4 obj2ilt {
-			-1, 0, 0, 0, // x
-			0, 0, 1, 0, // y
-			0, 1, 0, 0, // z
-			0, 0, 0, 0, // w
-	};
-	std::for_each(vertices.begin(), vertices.end(), [&obj2ilt](auto & v) {
-		v = v * obj2ilt;
-	});
-	std::for_each(normals.begin(), normals.end(), [&obj2ilt](auto & v) {
-		v = glm::vec4 {v, 0} * obj2ilt;
-	});
-}
-
-ObjParser::NamedMeshes
-ObjParser::createMeshes() const
-{
-	NamedMeshes out;
-	const auto data {createMeshData()};
-	std::transform(data.begin(), data.end(), std::inserter(out, out.end()), [](auto && obj) {
-		return std::make_pair(obj.first, std::make_shared<Mesh>(obj.second.first, obj.second.second));
-	});
-	return out;
-}
-
-ObjParser::NamedMeshesData
-ObjParser::createMeshData() const
-{
-	NamedMeshesData out;
-	std::transform(objects.begin(), objects.end(), std::inserter(out, out.end()), [this](auto && obj) {
-		std::vector<Vertex> overtices;
-		std::vector<ObjParser::FaceElement> vertexOrder;
-		std::vector<unsigned int> indices;
-		for (const auto & face : obj.second) {
-			for (auto idx = 2U; idx < face.size(); idx += 1) {
-				auto f = [&](auto idx) {
-					const auto & fe {face[idx]};
-					if (const auto existing = std::find(vertexOrder.begin(), vertexOrder.end(), fe);
-							existing != vertexOrder.end()) {
-						indices.push_back(static_cast<unsigned int>(std::distance(vertexOrder.begin(), existing)));
-					}
-					else {
-						indices.push_back(static_cast<unsigned int>(overtices.size()));
-						overtices.emplace_back(vertices[fe.x - 1], texCoords[fe.y - 1], -normals[fe.z - 1]);
-						vertexOrder.emplace_back(fe);
-					}
-				};
-				f(0U);
-				f(idx);
-				f(idx - 1);
-			}
-		}
-		return std::make_pair(obj.first, std::make_pair(overtices, indices));
-	});
-	return out;
-}
diff --git a/gfx/models/obj.ll b/gfx/models/obj.ll
deleted file mode 100644
index 84884fe..0000000
--- a/gfx/models/obj.ll
+++ /dev/null
@@ -1,116 +0,0 @@
-%option batch
-%option c++
-%option noyywrap
-%option 8bit
-%option stack
-%option yyclass="ObjParser"
-%option prefix="objbase"
-
-%{
-#include <gfx/models/obj.h>
-#include <glm/glm.hpp>
-#include <memory>
-#include <string>
-#include <vector>
-class objbaseFlexLexer;
-%}
-
-comment #.*
-float -?[0-9.]+
-index -?[0-9]+
-linestring [^\r\n]*
-truthy (1|on)
-falsey (0|off)
-
-%x FACE
-%x MTLLIB
-%x OBJECT
-%x SMOOTH
-%x USEMTL
-%x VERTEX
-%x NORMAL
-%x TEXCOORD
-
-%%
-
-<INITIAL>{comment} {
-  // fprintf(stderr, "COMMENT %s\n", YYText());
-}
-<INITIAL>"f " {
-  BEGIN(FACE);
-  objects.back().second.emplace_back();
-  objects.back().second.back().emplace_back();
-  axis = 0;
-}
-<INITIAL>"mtllib " {
-  BEGIN(MTLLIB);
-}
-<INITIAL>"o " {
-  BEGIN(OBJECT);
-}
-<INITIAL>"s " {
-  BEGIN(SMOOTH);
-}
-<INITIAL>"usemtl " {
-  BEGIN(USEMTL);
-}
-<INITIAL>"v " {
-  BEGIN(VERTEX);
-  vertices.emplace_back(0, 0, 0, 1);
-  axis = 0;
-}
-<INITIAL>"vn " {
-  BEGIN(NORMAL);
-  normals.emplace_back(0, 0, 0);
-  axis = 0;
-}
-<INITIAL>"vt " {
-  BEGIN(TEXCOORD);
-  texCoords.emplace_back(0, 1, 1);
-  axis = 0;
-}
-<USEMTL>{linestring} {
-  // fprintf(stderr, "USEMTL <%s>\n", YYText());
-}
-<MTLLIB>{linestring} {
-  // fprintf(stderr, "MTLLIB <%s>\n", YYText());
-}
-<OBJECT>{linestring} {
-  objects.emplace_back(YYText(), Faces{});
-}
-<SMOOTH>{truthy} {
-  // fprintf(stderr, "Set smooth\n");
-}
-<SMOOTH>{falsey} {
-  // fprintf(stderr, "Set flat\n");
-}
-<VERTEX>{float} {
-  vertices.back()[axis++] = std::stof(YYText());
-}
-<NORMAL>{float} {
-  normals.back()[axis++] = std::stof(YYText());
-}
-<TEXCOORD>{float} {
-  texCoords.back()[axis++] = std::stof(YYText());
-}
-<FACE>{index} {
-  objects.back().second.back().back()[axis] = std::stoi(YYText());
-}
-<FACE>\/ {
-  axis++;
-}
-<FACE>[ \t] {
-  objects.back().second.back().emplace_back();
-  axis = 0;
-}
-
-<*>[ \t] {
-}
-<*>[\r\n\f] {
-  BEGIN(INITIAL);
-}
-
-%%
-
-// Make iwyu think unistd.h is required
-[[maybe_unused]]static auto x=getpid;
diff --git a/gfx/models/texture.cpp b/gfx/models/texture.cpp
index efc76e1..e014f80 100644
--- a/gfx/models/texture.cpp
+++ b/gfx/models/texture.cpp
@@ -1,5 +1,6 @@
 #include "texture.h"
 #include "glArrays.h"
+#include "tga.h"
 #include <GL/glew.h>
 #include <cache.h>
 #include <fcntl.h>
@@ -12,6 +13,21 @@
 
 Cache<Texture, std::filesystem::path> Texture::cachedTexture;
 
+GLint
+TextureOptions::glMapMode(TextureOptions::MapMode mm)
+{
+	switch (mm) {
+		case MapMode::Repeat:
+			return GL_REPEAT;
+		case MapMode::Clamp:
+			return GL_CLAMP_TO_EDGE;
+		case MapMode::Mirror:
+			return GL_MIRRORED_REPEAT;
+		default:
+			throw std::domain_error("Invalid MapMode value");
+	}
+}
+
 Texture::Texture(const std::filesystem::path & fileName, TextureOptions to) :
 	Texture {Image {Resource::mapPath(fileName).c_str(), STBI_rgb_alpha}, to}
 {
@@ -29,8 +45,8 @@ Texture::Texture(GLsizei width, GLsizei height, const void * data, TextureOption
 	glBindTexture(type, m_texture);
 	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 
-	glTexParameteri(type, GL_TEXTURE_WRAP_S, to.wrap);
-	glTexParameteri(type, GL_TEXTURE_WRAP_T, to.wrap);
+	glTexParameteri(type, GL_TEXTURE_WRAP_S, TextureOptions::glMapMode(to.wrapU));
+	glTexParameteri(type, GL_TEXTURE_WRAP_T, TextureOptions::glMapMode(to.wrapV));
 
 	glTexParameteri(type, GL_TEXTURE_MIN_FILTER, to.minFilter);
 	glTexParameteri(type, GL_TEXTURE_MAG_FILTER, to.magFilter);
@@ -44,44 +60,91 @@ Texture::bind(GLenum unit) const
 	glBindTexture(type, m_texture);
 }
 
-void
-Texture::save(const glTexture & texture, GLenum format, GLenum type, const glm::ivec2 & size, unsigned short channels,
-		const char * path, short tgaFormat)
+glm::ivec2
+Texture::getSize(const glTexture & texture)
 {
-	using TGAHead = std::array<short, 9>;
+	glm::ivec2 size;
+	glGetTextureLevelParameteriv(texture, 0, GL_TEXTURE_WIDTH, &size.x);
+	glGetTextureLevelParameteriv(texture, 0, GL_TEXTURE_HEIGHT, &size.y);
+	return size;
+}
 
+void
+Texture::save(
+		const glTexture & texture, GLenum format, GLenum type, uint8_t channels, const char * path, uint8_t tgaFormat)
+{
+	const auto size = getSize(texture);
 	const size_t dataSize = (static_cast<size_t>(size.x * size.y * channels));
 	const size_t fileSize = dataSize + sizeof(TGAHead);
 
 	filesystem::fh out {path, O_RDWR | O_CREAT, 0660};
 	out.truncate(fileSize);
 	auto tga = out.mmap(fileSize, 0, PROT_WRITE, MAP_SHARED);
-	*tga.get<TGAHead>() = {0, tgaFormat, 0, 0, 0, 0, static_cast<short>(size.x), static_cast<short>(size.y),
-			static_cast<short>(8 * channels)};
+	*tga.get<TGAHead>() = {
+			.format = tgaFormat,
+			.size = size,
+			.pixelDepth = static_cast<uint8_t>(8 * channels),
+	};
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
 	glGetTextureImage(texture, 0, format, type, static_cast<GLsizei>(dataSize), tga.get<TGAHead>() + 1);
 	tga.msync(MS_ASYNC);
 }
 
 void
-Texture::save(const glm::ivec2 & size, const char * path) const
+Texture::save(const char * path) const
 {
-	save(m_texture, GL_BGR, GL_UNSIGNED_BYTE, size, 3, path, 2);
+	save(m_texture, GL_BGR, GL_UNSIGNED_BYTE, 3, path, 2);
 }
 
 void
-Texture::save(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::save(const glTexture & texture, const char * path)
 {
-	save(texture, GL_BGR, GL_UNSIGNED_BYTE, size, 3, path, 2);
+	save(texture, GL_BGR, GL_UNSIGNED_BYTE, 3, path, 2);
 }
 
 void
-Texture::saveDepth(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::saveDepth(const glTexture & texture, const char * path)
 {
-	save(texture, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, size, 1, path, 3);
+	save(texture, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 1, path, 3);
 }
 
 void
-Texture::saveNormal(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::saveNormal(const glTexture & texture, const char * path)
+{
+	save(texture, GL_BGR, GL_BYTE, 3, path, 2);
+}
+
+TextureAtlas::TextureAtlas(GLsizei width, GLsizei height, GLuint count) : Texture(width, height, nullptr, {})
+{
+	glBindTexture(GL_TEXTURE_RECTANGLE, m_atlas);
+
+	glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+	glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA16UI, 2, static_cast<GLsizei>(count), 0, GL_RGBA_INTEGER,
+			GL_UNSIGNED_BYTE, nullptr);
+}
+
+void
+TextureAtlas::bind(GLenum unit) const
+{
+	Texture::bind(unit);
+	glActiveTexture(unit + 1);
+	glBindTexture(GL_TEXTURE_RECTANGLE, m_atlas);
+}
+
+GLuint
+TextureAtlas::add(glm::ivec2 position, glm::ivec2 size, void * data, TextureOptions to)
 {
-	save(texture, GL_BGR, GL_BYTE, size, 3, path, 2);
+	glTextureSubImage2D(m_texture, 0, position.x, position.y, size.x, size.y, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	struct Material {
+		glm::vec<2, uint16_t> position, size;
+		TextureOptions::MapMode wrapU;
+		TextureOptions::MapMode wrapV;
+	} material {position, size, to.wrapU, to.wrapV};
+	static_assert(sizeof(Material) <= 32);
+	glTextureSubImage2D(m_atlas, 0, 0, static_cast<GLsizei>(used), 2, 1, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, &material);
+	return ++used;
 }
diff --git a/gfx/models/texture.h b/gfx/models/texture.h
index ffc9a4a..86e76a0 100644
--- a/gfx/models/texture.h
+++ b/gfx/models/texture.h
@@ -9,13 +9,23 @@
 class Image;
 
 struct TextureOptions {
-	GLint wrap {GL_REPEAT};
+	enum class MapMode {
+		Repeat,
+		Clamp,
+		Mirror,
+		Decal,
+	};
+	MapMode wrapU {MapMode::Repeat}, wrapV {MapMode::Repeat};
 	GLint minFilter {GL_LINEAR}, magFilter {GL_LINEAR};
 	GLenum type {GL_TEXTURE_2D};
+	static GLint glMapMode(MapMode);
 };
 
 class Texture {
 public:
+	virtual ~Texture() = default;
+	DEFAULT_MOVE_NO_COPY(Texture);
+
 	explicit Texture(const std::filesystem::path & fileName, TextureOptions = {});
 	explicit Texture(const Image & image, TextureOptions = {});
 	explicit Texture(GLsizei width, GLsizei height, TextureOptions = {});
@@ -23,17 +33,29 @@ public:
 
 	static Cache<Texture, std::filesystem::path> cachedTexture;
 
-	void bind(GLenum unit = GL_TEXTURE0) const;
+	virtual void bind(GLenum unit = GL_TEXTURE0) const;
 
-	void save(const glm::ivec2 & size, const char * path) const;
-	static void save(const glTexture &, const glm::ivec2 & size, const char * path);
-	static void saveDepth(const glTexture &, const glm::ivec2 & size, const char * path);
-	static void saveNormal(const glTexture &, const glm::ivec2 & size, const char * path);
+	void save(const char * path) const;
+	static void save(const glTexture &, const char * path);
+	static void saveDepth(const glTexture &, const char * path);
+	static void saveNormal(const glTexture &, const char * path);
 
-private:
-	static void save(const glTexture &, GLenum, GLenum, const glm::ivec2 & size, unsigned short channels,
-			const char * path, short tgaFormat);
+protected:
+	static void save(const glTexture &, GLenum, GLenum, uint8_t channels, const char * path, uint8_t tgaFormat);
+	static glm::ivec2 getSize(const glTexture &);
 
 	glTexture m_texture;
 	GLenum type;
 };
+
+class TextureAtlas : public Texture {
+public:
+	TextureAtlas(GLsizei width, GLsizei height, GLuint count);
+
+	void bind(GLenum unit = GL_TEXTURE0) const override;
+	GLuint add(glm::ivec2 position, glm::ivec2 size, void * data, TextureOptions = {});
+
+private:
+	glTexture m_atlas;
+	GLuint used {};
+};
diff --git a/gfx/models/tga.h b/gfx/models/tga.h
new file mode 100644
index 0000000..1f400ef
--- /dev/null
+++ b/gfx/models/tga.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <cstdint>
+#include <glm/vec2.hpp>
+
+struct TGAHead {
+	uint8_t idLength {}, colorMapType {}, format {};
+	uint16_t __attribute__((packed)) colorMapFirst {}, colorMapLength {};
+	uint8_t colorMapEntrySize {};
+	glm::vec<2, uint16_t> origin {}, size {};
+	uint8_t pixelDepth {};
+	uint8_t descriptor {};
+};
+static_assert(sizeof(TGAHead) == 18);
diff --git a/gfx/models/vertex.hpp b/gfx/models/vertex.hpp
index 64ec3d0..181e7e7 100644
--- a/gfx/models/vertex.hpp
+++ b/gfx/models/vertex.hpp
@@ -1,12 +1,14 @@
 #pragma once
 
+#include <GL/glew.h>
 #include <glm/glm.hpp>
 
 class Vertex {
 public:
 #ifndef __cpp_aggregate_paren_init
-	constexpr Vertex(glm::vec3 pos, glm::vec2 texCoord, glm::vec3 normal, glm::vec4 colour = {}) :
-		pos {std::move(pos)}, texCoord {std::move(texCoord)}, normal {std::move(normal)}, colour {std::move(colour)}
+	constexpr Vertex(glm::vec3 pos, glm::vec2 texCoord, glm::vec3 normal, glm::vec4 colour = {}, GLuint material = 0) :
+		pos {std::move(pos)}, texCoord {std::move(texCoord)}, normal {std::move(normal)}, colour {std::move(colour)},
+		material {material}
 	{
 	}
 #endif
@@ -16,5 +18,6 @@ public:
 	glm::vec3 pos;
 	glm::vec2 texCoord;
 	glm::vec3 normal;
-	glm::vec4 colour;
+	glm::vec4 colour {};
+	GLuint material {};
 };