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authorDan Goodliffe <dan@randomdan.homeip.net>2021-02-20 00:17:58 +0000
committerDan Goodliffe <dan@randomdan.homeip.net>2021-02-20 00:17:58 +0000
commit2bc4bcebc93e7211dfb84303888635f888ba8018 (patch)
tree3a349beadc079c544001f3a65ac0e26fe494f8e5 /game
parentCreate smoother terrain (diff)
downloadilt-2bc4bcebc93e7211dfb84303888635f888ba8018.tar.bz2
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Custom land and water shaders
Create sandy beaches, snow topped mountains and grassy hills with a single texture, coloured according to land height by a custom shader. Also use the land mass mesh with a new water texture and a custom shader to create rather nice looking water effect with depth, waves and motion.
Diffstat (limited to 'game')
-rw-r--r--game/terrain.cpp44
-rw-r--r--game/terrain.h4
2 files changed, 15 insertions, 33 deletions
diff --git a/game/terrain.cpp b/game/terrain.cpp
index 83116fc..20c06e8 100644
--- a/game/terrain.cpp
+++ b/game/terrain.cpp
@@ -9,13 +9,10 @@
#include <gfx/models/mesh.h>
#include <gfx/models/vertex.hpp>
#include <glm/glm.hpp>
+#include <maths.h>
#include <random>
#include <stb_image.h>
-template<unsigned int Comp> class TerrainComp : public Mesh {
- using Mesh::Mesh;
-};
-
Terrain::Terrain() : grass {Texture::cachedTexture.get("grass.png")}, water {Texture::cachedTexture.get("water.png")}
{
constexpr auto size {241}; // Vertices
@@ -66,7 +63,6 @@ Terrain::Terrain() : grass {Texture::cachedTexture.get("grass.png")}, water {Tex
}
}
finish(size, size, vertices);
- addWater(size, size, resolution);
}
Terrain::Terrain(const std::string & fileName) :
@@ -89,7 +85,6 @@ Terrain::Terrain(const std::string & fileName) :
}
finish(map.width, map.height, vertices);
- addWater(map.width, map.height, resolution);
}
void
@@ -125,40 +120,27 @@ Terrain::finish(unsigned int width, unsigned int height, std::vector<Vertex> & v
v(width, x, z).normal = -glm::normalize(glm::cross(c - a, d - b));
}
}
- meshes.create<TerrainComp<0>>(vertices, indices);
+ meshes.create<Mesh>(vertices, indices);
}
+static const Transform identity {};
+static const auto identityModel {identity.GetModel()};
+
void
-Terrain::addWater(unsigned int width, unsigned int height, unsigned int resolution)
+Terrain::tick(TickDuration dur)
{
- const auto verticesCount {0U};
- std::vector<Vertex> vertices;
- std::vector<unsigned int> indices;
- // Add water
- const auto extentx {(int)((width - 1) * resolution / 2)};
- const auto extentz {(int)((height - 1) * resolution / 2)};
- vertices.emplace_back(glm::vec3 {-extentx, 0, -extentz}, glm::vec2 {0, 0}, glm::vec3 {0, 1, 0});
- vertices.emplace_back(glm::vec3 {-extentx, 0, extentz}, glm::vec2 {0, height}, glm::vec3 {0, 1, 0});
- vertices.emplace_back(glm::vec3 {extentx, 0, extentz}, glm::vec2 {width, height}, glm::vec3 {0, 1, 0});
- vertices.emplace_back(glm::vec3 {extentx, 0, -extentz}, glm::vec2 {width, 0}, glm::vec3 {0, 1, 0});
- indices.push_back(verticesCount);
- indices.push_back(verticesCount + 1);
- indices.push_back(verticesCount + 2);
- indices.push_back(verticesCount);
- indices.push_back(verticesCount + 2);
- indices.push_back(verticesCount + 3);
- meshes.create<TerrainComp<1>>(vertices, indices);
+ waveCycle += dur.count();
}
-static const Transform identity {};
-static const auto identityModel {identity.GetModel()};
-
void
Terrain::render(const Shader & shader) const
{
- shader.setModel(identityModel);
+ shader.setModel(identityModel, Shader::Program::LandMass);
grass->Bind();
- meshes.apply<TerrainComp<0>>(&Mesh::Draw);
+ meshes.apply(&Mesh::Draw);
+
+ shader.setModel(identityModel, Shader::Program::Water);
+ shader.setUniform("waves", {waveCycle, 0, 0});
water->Bind();
- meshes.apply<TerrainComp<1>>(&Mesh::Draw);
+ meshes.apply(&Mesh::Draw);
}
diff --git a/game/terrain.h b/game/terrain.h
index 1aed1c5..2cec963 100644
--- a/game/terrain.h
+++ b/game/terrain.h
@@ -20,13 +20,13 @@ public:
void render(const Shader & shader) const override;
- void tick(TickDuration) override { }
+ void tick(TickDuration) override;
+ float waveCycle {0.F};
private:
static constexpr unsigned int NUM_BUFFERS {4};
void finish(unsigned int width, unsigned int height, std::vector<Vertex> &);
- void addWater(unsigned int width, unsigned int height, unsigned int resolution);
Collection<Mesh, false> meshes;
std::shared_ptr<Texture> grass, water;