From 741bb027df58fd9f30f4d94cdaf2d6416e11e3ee Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 16 Apr 2024 00:23:43 +0100
Subject: Custom vertex, vertex shader and fragment shader for landmass
Handles global position type, colourBias for surface types
---
game/terrain.cpp | 22 ++++++++++++++++------
game/terrain.h | 9 ++++++++-
gfx/gl/sceneShader.cpp | 3 ++-
gfx/gl/shaders/landmass.fs | 23 +++++++++++++++--------
gfx/gl/shaders/landmass.vs | 23 +++++++++++++++++++++++
gfx/gl/shaders/shadowFixedPoint.vs | 9 ---------
gfx/gl/shaders/shadowLandmass.vs | 13 +++++++++++++
gfx/gl/shadowMapper.cpp | 6 +++---
gfx/gl/shadowMapper.h | 2 +-
9 files changed, 81 insertions(+), 29 deletions(-)
create mode 100644 gfx/gl/shaders/landmass.vs
delete mode 100644 gfx/gl/shaders/shadowFixedPoint.vs
create mode 100644 gfx/gl/shaders/shadowLandmass.vs
diff --git a/game/terrain.cpp b/game/terrain.cpp
index c19bd0a..3b16e79 100644
--- a/game/terrain.cpp
+++ b/game/terrain.cpp
@@ -15,11 +15,21 @@
#include <utility>
#include <vector>
+static constexpr RGB openSurface {-1};
+
Terrain::Terrain(std::shared_ptr<GeoData> tm) : geoData {std::move(tm)}, grass {std::make_shared<Texture>("grass.png")}
{
generateMeshes();
}
+template<>
+VertexArrayObject &
+VertexArrayObject::addAttribsFor<Terrain::Vertex>(const GLuint arrayBuffer, const GLuint divisor)
+{
+ return addAttribs<Terrain::Vertex, &Terrain::Vertex::pos, &Terrain::Vertex::normal, &Terrain::Vertex::colourBias>(
+ arrayBuffer, divisor);
+}
+
void
Terrain::generateMeshes()
{
@@ -32,13 +42,13 @@ Terrain::generateMeshes()
[this, &vertexIndex, &vertices](const GeoData::VertexHandle v) {
std::for_each(geoData->vf_begin(v), geoData->vf_end(v),
[&vertexIndex, v, this, &vertices](const GeoData::FaceHandle f) {
- if (const auto vertexIndexRef
- = vertexIndex.emplace(std::make_pair(v, geoData->get_surface(f)), 0);
+ const auto surface = geoData->get_surface(f);
+ if (const auto vertexIndexRef = vertexIndex.emplace(std::make_pair(v, surface), 0);
vertexIndexRef.second) {
vertexIndexRef.first->second = vertices.size();
- const auto p = geoData->point(v);
- vertices.emplace_back(p, RelativePosition2D(p) / 10000.F, geoData->normal(v));
+ vertices.emplace_back(geoData->point(v), geoData->normal(v),
+ surface ? surface->colorBias : openSurface);
}
});
});
@@ -49,7 +59,7 @@ Terrain::generateMeshes()
return vertexIndex[std::make_pair(v, geoData->get_surface(f))];
});
});
- meshes.create<Mesh>(vertices, indices);
+ meshes.create<MeshT<Vertex>>(vertices, indices);
}
void
@@ -68,6 +78,6 @@ Terrain::render(const SceneShader & shader) const
void
Terrain::shadows(const ShadowMapper & shadowMapper) const
{
- shadowMapper.fixedPoint.use();
+ shadowMapper.landmess.use();
meshes.apply(&Mesh::Draw);
}
diff --git a/game/terrain.h b/game/terrain.h
index 54593fc..d088f89 100644
--- a/game/terrain.h
+++ b/game/terrain.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 +21,16 @@ public:
void tick(TickDuration) override;
+ struct Vertex {
+ GlobalPosition3D pos;
+ Normal3D normal;
+ RGB colourBias;
+ };
+
private:
void generateMeshes();
std::shared_ptr<GeoData> geoData;
- Collection<Mesh, false> meshes;
+ Collection<MeshT<Vertex>, false> meshes;
std::shared_ptr<Texture> grass;
};
diff --git a/gfx/gl/sceneShader.cpp b/gfx/gl/sceneShader.cpp
index 2dd9612..985faa0 100644
--- a/gfx/gl/sceneShader.cpp
+++ b/gfx/gl/sceneShader.cpp
@@ -12,6 +12,7 @@
#include <gfx/gl/shaders/vs-dynamicPoint.h>
#include <gfx/gl/shaders/vs-dynamicPointInst.h>
#include <gfx/gl/shaders/vs-fixedPoint.h>
+#include <gfx/gl/shaders/vs-landmass.h>
#include <gfx/gl/shaders/vs-networkCurve.h>
#include <gfx/gl/shaders/vs-networkStraight.h>
#include <gfx/gl/shaders/vs-pointLight.h>
@@ -33,7 +34,7 @@ SceneShader::allPrograms(auto member, auto &&... ps) const
}
SceneShader::SceneShader() :
- basicInst {dynamicPointInst_vs, material_fs}, landmass {fixedPoint_vs, landmass_fs},
+ basicInst {dynamicPointInst_vs, material_fs}, landmass {landmass_vs, landmass_fs},
absolute {fixedPoint_vs, material_fs}, spotLightInst {spotLight_vs, spotLight_gs, spotLight_fs},
pointLightInst {pointLight_vs, pointLight_gs, pointLight_fs},
networkStraight {networkStraight_vs, networkStraight_gs, network_fs},
diff --git a/gfx/gl/shaders/landmass.fs b/gfx/gl/shaders/landmass.fs
index fc43bf2..55e3c24 100644
--- a/gfx/gl/shaders/landmass.fs
+++ b/gfx/gl/shaders/landmass.fs
@@ -1,9 +1,12 @@
#version 330 core
-include(`materialInterface.glsl')
include(`materialOut.glsl')
+in vec3 FragPos;
+in vec3 Normal;
+flat in vec3 ColourBias;
uniform sampler2D texture0;
+uniform ivec3 viewPoint;
const vec3 grass = vec3(.1, .4, .05);
const vec3 slope = vec3(.6, .6, .4);
@@ -11,9 +14,9 @@ const vec3 rock = vec3(.2, .2, .1);
const vec3 sand = vec3(.76, .7, .5);
const vec3 snow = vec3(.97, .97, .99);
-const float beachline = 500;
-const float snowline_low = 28000;
-const float snowline_high = 30000;
+const int beachline = 500;
+const int snowline_low = 28000;
+const int snowline_high = 30000;
const float slope_min = .99;
const float slope_mid = .95;
@@ -28,10 +31,14 @@ mixBetween(vec3 colA, vec3 colB, float blend, float low, float high)
void
main()
{
- vec3 color = texture(texture0, TexCoords).rgb;
+ ivec3 position = ivec3(FragPos) + viewPoint;
+ vec3 color = texture(texture0, vec2(position.xy % 10000) / 10000.0).rgb;
- float height = FragPos.z;
- if (height < beachline) { // Sandy beach
+ int height = position.z;
+ if (ColourBias.r >= 0) {
+ color *= ColourBias;
+ }
+ else if (height < beachline) { // Sandy beach
color *= sand;
}
else if (Normal.z < slope_max) { // Dark rocky face
@@ -60,7 +67,7 @@ main()
}
}
- gPosition = ivec4(FragPos, 1);
+ gPosition = ivec4(position, 1);
gNormal = vec4(Normal, 1);
gAlbedoSpec = vec4(color, 1);
}
diff --git a/gfx/gl/shaders/landmass.vs b/gfx/gl/shaders/landmass.vs
new file mode 100644
index 0000000..9617cb9
--- /dev/null
+++ b/gfx/gl/shaders/landmass.vs
@@ -0,0 +1,23 @@
+#version 330 core
+#extension GL_ARB_shading_language_420pack : enable
+
+layout(location = 0) in ivec3 position;
+layout(location = 1) in vec3 normal;
+layout(location = 2) in vec3 colourBias;
+
+out vec3 FragPos;
+out vec3 Normal;
+flat out vec3 ColourBias;
+
+uniform mat4 viewProjection;
+uniform ivec3 viewPoint;
+
+void
+main()
+{
+ FragPos = position - viewPoint;
+ Normal = normal;
+ ColourBias = colourBias;
+
+ gl_Position = viewProjection * vec4(FragPos, 1);
+}
diff --git a/gfx/gl/shaders/shadowFixedPoint.vs b/gfx/gl/shaders/shadowFixedPoint.vs
deleted file mode 100644
index 1376388..0000000
--- a/gfx/gl/shaders/shadowFixedPoint.vs
+++ /dev/null
@@ -1,9 +0,0 @@
-#version 330 core
-
-include(`meshIn.glsl')
-
-uniform ivec3 viewPoint;
-const mat3 model = mat3(1);
-const ivec3 modelPos = ivec3(0);
-
-include(`commonShadowPoint.glsl')
diff --git a/gfx/gl/shaders/shadowLandmass.vs b/gfx/gl/shaders/shadowLandmass.vs
new file mode 100644
index 0000000..becf142
--- /dev/null
+++ b/gfx/gl/shaders/shadowLandmass.vs
@@ -0,0 +1,13 @@
+#version 330 core
+
+layout(location = 0) in ivec3 position;
+
+uniform ivec3 viewPoint;
+
+out vec4 vworldPos;
+
+void
+main()
+{
+ vworldPos = vec4(position - viewPoint, 1);
+}
diff --git a/gfx/gl/shadowMapper.cpp b/gfx/gl/shadowMapper.cpp
index 4dbee8d..206e4a7 100644
--- a/gfx/gl/shadowMapper.cpp
+++ b/gfx/gl/shadowMapper.cpp
@@ -4,7 +4,7 @@
#include "gfx/gl/shaders/gs-commonShadowPoint.h"
#include "gfx/gl/shaders/vs-shadowDynamicPoint.h"
#include "gfx/gl/shaders/vs-shadowDynamicPointInst.h"
-#include "gfx/gl/shaders/vs-shadowFixedPoint.h"
+#include "gfx/gl/shaders/vs-shadowLandmass.h"
#include "gl_traits.h"
#include "location.h"
#include "maths.h"
@@ -18,7 +18,7 @@
#include <vector>
ShadowMapper::ShadowMapper(const TextureAbsCoord & s) :
- fixedPoint {shadowFixedPoint_vs}, dynamicPointInst {shadowDynamicPointInst_vs}, size {s}
+ landmess {shadowLandmass_vs}, dynamicPointInst {shadowDynamicPointInst_vs}, size {s}
{
glBindTexture(GL_TEXTURE_2D_ARRAY, depthMap);
glTexImage3D(
@@ -92,7 +92,7 @@ ShadowMapper::update(const SceneProvider & scene, const Direction3D & dir, const
return lightProjection * lightViewDir;
});
- for (const auto p : std::initializer_list<const ShadowProgram *> {&fixedPoint, &dynamicPoint, &dynamicPointInst}) {
+ for (const auto p : std::initializer_list<const ShadowProgram *> {&landmess, &dynamicPoint, &dynamicPointInst}) {
p->setView(out, lightViewPoint);
}
scene.shadows(*this);
diff --git a/gfx/gl/shadowMapper.h b/gfx/gl/shadowMapper.h
index a95d4c1..dcf7e3f 100644
--- a/gfx/gl/shadowMapper.h
+++ b/gfx/gl/shadowMapper.h
@@ -50,7 +50,7 @@ public:
RequiredUniformLocation modelPosLoc;
};
- FixedPoint fixedPoint, dynamicPointInst;
+ FixedPoint landmess, dynamicPointInst;
DynamicPoint dynamicPoint;
// NOLINTNEXTLINE(hicpp-explicit-conversions)
--
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