From 97d4db588bfc4254e09e4305fb0525a04748f84e Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 7 Apr 2024 19:38:18 +0100
Subject: Stripped down water vertex and simplified shaders

---
 game/water.cpp          | 15 ++++++++++-----
 game/water.h            |  7 ++++++-
 gfx/gl/shaders/water.fs |  5 +++--
 gfx/gl/shaders/water.vs | 12 ++++++------
 ui/gameMainWindow.cpp   |  3 +--
 5 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/game/water.cpp b/game/water.cpp
index 3dc1916..f720e3e 100644
--- a/game/water.cpp
+++ b/game/water.cpp
@@ -9,7 +9,6 @@
 #include <gfx/models/mesh.h>
 #include <gfx/models/vertex.h>
 #include <glm/glm.hpp>
-#include <iterator>
 #include <location.h>
 #include <maths.h>
 #include <set>
@@ -24,6 +23,13 @@ namespace glm {
 	}
 }
 
+template<>
+VertexArrayObject &
+VertexArrayObject::addAttribsFor<Water::Vertex>(const GLuint arrayBuffer, const GLuint divisor)
+{
+	return addAttribs<Water::Vertex, &Water::Vertex::pos>(arrayBuffer, divisor);
+}
+
 Water::Water(std::shared_ptr<GeoData> tm) : geoData {std::move(tm)}, water {std::make_shared<Texture>("water.png")}
 {
 	generateMeshes();
@@ -77,8 +83,7 @@ Water::generateMeshes()
 						const auto v = vertexIndex.emplace(pos, vertices.size());
 						if (v.second) {
 							const auto cpos = glm::clamp(pos, std::get<0>(extents).xy(), std::get<1>(extents).xy());
-							vertices.emplace_back(RelativePosition3D {geoData->positionAt(cpos)},
-									TextureRelCoord(pos / TILE_SIZE), up);
+							vertices.emplace_back(geoData->positionAt(cpos));
 						}
 						*out++ = static_cast<unsigned int>(v.first->second);
 					}
@@ -87,7 +92,7 @@ Water::generateMeshes()
 					indices.push_back(currentIndices[i]);
 				}
 			});
-	meshes.create<Mesh>(vertices, indices);
+	meshes.create<MeshT<Vertex>>(vertices, indices);
 }
 
 void
@@ -101,5 +106,5 @@ Water::render(const SceneShader & shader) const
 {
 	shader.water.use(waveCycle);
 	water->bind();
-	meshes.apply(&Mesh::Draw);
+	meshes.apply(&MeshT<GlobalPosition3D>::Draw);
 }
diff --git a/game/water.h b/game/water.h
index 20796d7..ceb7bd2 100644
--- a/game/water.h
+++ b/game/water.h
@@ -2,6 +2,7 @@
 
 #include "chronology.h"
 #include "collection.h"
+#include "config/types.h"
 #include "game/worldobject.h"
 #include <gfx/models/mesh.h>
 #include <gfx/renderable.h>
@@ -20,10 +21,14 @@ public:
 	void tick(TickDuration) override;
 	float waveCycle {0.F};
 
+	struct Vertex {
+		GlobalPosition3D pos;
+	};
+
 private:
 	void generateMeshes();
 
 	std::shared_ptr<GeoData> geoData;
-	Collection<Mesh, false> meshes;
+	Collection<MeshT<Vertex>, false> meshes;
 	std::shared_ptr<Texture> water;
 };
diff --git a/gfx/gl/shaders/water.fs b/gfx/gl/shaders/water.fs
index 8891733..0918d9f 100644
--- a/gfx/gl/shaders/water.fs
+++ b/gfx/gl/shaders/water.fs
@@ -1,7 +1,8 @@
 #version 330 core
 #extension GL_ARB_shading_language_420pack : enable
 
-include(`materialInterface.glsl')
+in vec3 FragPos;
+in vec2 TexCoords;
 include(`materialOut.glsl')
 
 uniform sampler2D texture0;
@@ -10,7 +11,7 @@ void
 main()
 {
 	gPosition = ivec4(FragPos, 1);
-	gNormal = vec4(Normal, 1);
+	gNormal = vec4(0, 0, 1, 1);
 	gAlbedoSpec = texture(texture0, TexCoords);
 	gAlbedoSpec.a *= clamp(-FragPos.z * .0007, .1, 1.0);
 }
diff --git a/gfx/gl/shaders/water.vs b/gfx/gl/shaders/water.vs
index f6c7c8f..34c4700 100644
--- a/gfx/gl/shaders/water.vs
+++ b/gfx/gl/shaders/water.vs
@@ -1,7 +1,8 @@
 #version 330 core
 
-include(`meshIn.glsl')
-include(`materialInterface.glsl')
+layout(location = 0) in ivec3 position;
+out vec3 FragPos;
+out vec2 TexCoords;
 
 uniform mat4 viewProjection;
 uniform ivec3 viewPoint;
@@ -10,12 +11,11 @@ uniform float waves;
 void
 main()
 {
-	vec3 wpos = vec3(position.x + (cos(waves) * 1000.0), position.y + (cos(waves * 0 / 2) * 1000.0),
-			cos(waves + (position.x / 1000000.0) + (position.y / 8000.0)) * 300.0);
+	vec3 wpos = vec3(position.x + (cos(waves) * 1000.0), position.y + (cos(waves * 1.4) * 1000.0),
+			cos(waves + (position.x / 1000000) + (position.y / 8000)) * 300.0);
 
 	FragPos = vec3(wpos.xy, position.z);
-	TexCoords = texCoord;
-	Normal = normal;
+	TexCoords = position.xy / 8192;
 
 	gl_Position = viewProjection * vec4(wpos - viewPoint, 1.0);
 }
diff --git a/ui/gameMainWindow.cpp b/ui/gameMainWindow.cpp
index d71c74a..ccbcdba 100644
--- a/ui/gameMainWindow.cpp
+++ b/ui/gameMainWindow.cpp
@@ -15,7 +15,6 @@
 #include <glad/gl.h>
 #include <glm/glm.hpp>
 #include <memory>
-#include <utility>
 
 class GameMainToolbar : Mode<decltype(GameMainSelector::target)>, public Toolbar {
 public:
@@ -31,7 +30,7 @@ public:
 GameMainWindow::GameMainWindow(size_t w, size_t h) :
 	Window {w, h, "I Like Trains", SDL_WINDOW_OPENGL}, SceneRenderer {Window::size, 0}
 {
-	uiComponents.create<ManualCameraController>(glm::vec2 {315'000'000, 495'000'000});
+	uiComponents.create<ManualCameraController>(glm::vec2 {310'727'624, 494'018'810});
 	auto gms = uiComponents.create<GameMainSelector>(&camera, ScreenAbsCoord {w, h});
 	uiComponents.create<GameMainToolbar>(gms.get());
 }
-- 
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