feat: include for glsl (#24)

* refactor(gameplay): remove unused includes and members, clear vertex data after upload

* feat(shader-tools): add recursive #include support for shader sources

* refactor(shaders): extract noise and sky color functions into shared GLSL includes

assets/shaders/compute_sky_color.glsl

@@ -0,0 +1,46 @@
+#include "noise.glsl"
+
+vec3 computeSkyColor(vec3 dir) {
+    vec3 sund = normalize(sunDir);
+
+    float t =
+        clamp(
+            dir.y * 0.5 + 0.5,
+            0.0,
+            1.0
+        );
+
+
+    vec3 sky =
+        mix(
+            skyBottom,
+            skyTop,
+            pow(t, horizonSharpness)
+        );
+
+    // cloud
+    if (dir.y > 0.0) {
+        vec2 cloud_uv = dir.xz / (dir.y + 0.15) * 0.5 + vec2(time * 0.005, time * 0.002);
+        float cloud_density = fbm(cloud_uv * 2.0);
+        float safeLow = cloudThresholdLow;
+        float safeHigh = max(cloudThresholdHigh, cloudThresholdLow + 0.001);
+        cloud_density = smoothstep(safeLow,safeHigh, cloud_density);
+
+        
+        float fade = smoothstep(0.0, 0.3, dir.y) * (1.0 - smoothstep(0.85, 1.0, dir.y));
+        cloud_density *= fade;
+
+        vec3 cloud_color = mix(skyBottom, vec3(1.0), cloudWhiteMix); 
+        sky = mix(sky, cloud_color, cloud_density * 0.6);
+    }
+
+    float sunAmount = max(dot(dir, sund), 0.0);
+        
+    //float glow = pow(sunAmount, 8.0) * 0.15;
+        
+    float glow = pow(sunAmount, 8.0) * 0.15 + pow(sunAmount, 32.0) * 0.3;
+
+    sky += glow * sunColor;
+
+    return sky;
+}

assets/shaders/noise.glsl

@@ -0,0 +1,25 @@
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
+}
+
+float noise(vec2 p) {
+    vec2 i = floor(p);
+    vec2 f = fract(p);
+    f = f * f * (3.0 - 2.0 * f);
+    float a = hash(i);
+    float b = hash(i + vec2(1.0, 0.0));
+    float c = hash(i + vec2(0.0, 1.0));
+    float d = hash(i + vec2(1.0, 1.0));
+    return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
+}
+
+float fbm(vec2 p) {
+    float v = 0.0;
+    float amp = 0.5;
+    for (int i = 0; i < 5; i++) {
+        v += amp * noise(p);
+        p *= 2.0;
+        amp *= 0.5;
+    }
+    return v;
+}

assets/shaders/sky_f_shader.glsl

@@ -19,84 +19,12 @@ uniform float cloudThresholdHigh;
 
 uniform float time;
 
-
-float hash(vec2 p) {
-    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
-}
-
-float noise(vec2 p) {
-    vec2 i = floor(p);
-    vec2 f = fract(p);
-    f = f * f * (3.0 - 2.0 * f);
-    float a = hash(i);
-    float b = hash(i + vec2(1.0, 0.0));
-    float c = hash(i + vec2(0.0, 1.0));
-    float d = hash(i + vec2(1.0, 1.0));
-    return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
-}
-
-float fbm(vec2 p) {
-    float v = 0.0;
-    float amp = 0.5;
-    for (int i = 0; i < 5; i++) {
-        v += amp * noise(p);
-        p *= 2.0;
-        amp *= 0.5;
-    }
-    return v;
-}
-
-vec3 computeSkyColor(vec3 dir) {
-    vec3 sund = normalize(sunDir);
-
-    float t =
-        clamp(
-            dir.y * 0.5 + 0.5,
-            0.0,
-            1.0
-        );
-
-
-    vec3 sky =
-        mix(
-            skyBottom,
-            skyTop,
-            pow(t, horizonSharpness)
-        );
-
-    // cloud
-    if (dir.y > 0.0) {
-        vec2 cloud_uv = dir.xz / (dir.y + 0.15) * 0.5 + vec2(time * 0.005, time * 0.002);
-        float cloud_density = fbm(cloud_uv * 2.0);
-        float safeLow = cloudThresholdLow;
-        float safeHigh = max(cloudThresholdHigh, cloudThresholdLow + 0.001);
-        cloud_density = smoothstep(safeLow,safeHigh, cloud_density);
-
-        
-        float fade = smoothstep(0.0, 0.3, dir.y) * (1.0 - smoothstep(0.85, 1.0, dir.y));
-        cloud_density *= fade;
-
-        vec3 cloud_color = mix(skyBottom, vec3(1.0), cloudWhiteMix); 
-        sky = mix(sky, cloud_color, cloud_density * 0.6);
-    }
-
-    float sunAmount = max(dot(dir, sund), 0.0);
-        
-    //float glow = pow(sunAmount, 8.0) * 0.15;
-        
-    float glow = pow(sunAmount, 8.0) * 0.15 + pow(sunAmount, 32.0) * 0.3;
-
-    sky += glow * sunColor;
-
-    return sky;
-}
+#include "compute_sky_color.glsl"
 
 void main(void) {
     
     vec3 sky = computeSkyColor(dir);
 
     frag_color = vec4(sky, 1.0);
-    //frag_color = vec4(vec3(sunAmount), 1.0);
-    //frag_color = vec4(t,0,0,1);
     
 }

assets/shaders/under_water_f_shader.glsl

@@ -19,33 +19,7 @@ uniform vec3 sunDir;
 uniform vec3 sunColor;
 uniform float waterDensity;
 
-float hash(vec2 p) {
-    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453);
-}
-
-float noise(vec2 p) {
-    vec2 i = floor(p);
-    vec2 f = fract(p);
-    f = f * f * (3.0 - 2.0 * f);   
-
-    return mix(
-        mix(hash(i), hash(i + vec2(1.0, 0.0)), f.x),
-        mix(hash(i + vec2(0.0, 1.0)), hash(i + vec2(1.0, 1.0)), f.x),
-        f.y
-    );
-}
-
-float fbm(vec2 p) {
-    float value = 0.0;
-    float amp = 0.5;
-    float freq = 1.0;
-    for (int i = 0; i < 4; ++i) {
-        value += amp * noise(p * freq);
-        freq *= 2.0;
-        amp *= 0.5;
-    }
-    return value;
-}
+#include "noise.glsl"
 
 float getCausticValue(float x, float y, float z) {
     float w = 8.0;      

assets/shaders/water_f_shader.glsl

@@ -42,82 +42,15 @@ uniform float refractStrength;
 
 uniform bool enablePerturb;
 uniform bool enableDepthFade;
+
+#include "compute_sky_color.glsl"
+
 float weight(float z, float a) {
     float intermediate = 0.03 / (1e-5 + pow(z / 200.0, 4.0));
     
     return a * clamp(intermediate, 1e-2, 3e2);
 }
 
-float hash(vec2 p) {
-    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
-}
-
-float noise(vec2 p) {
-    vec2 i = floor(p);
-    vec2 f = fract(p);
-    f = f * f * (3.0 - 2.0 * f);
-    float a = hash(i);
-    float b = hash(i + vec2(1.0, 0.0));
-    float c = hash(i + vec2(0.0, 1.0));
-    float d = hash(i + vec2(1.0, 1.0));
-    return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
-}
-
-float fbm(vec2 p) {
-    float v = 0.0;
-    float amp = 0.5;
-    for (int i = 0; i < 5; i++) {
-        v += amp * noise(p);
-        p *= 2.0;
-        amp *= 0.5;
-    }
-    return v;
-}
-
-vec3 computeSkyColor(vec3 dir) {
-    vec3 sund = normalize(sunDir);
-
-    float t =
-        clamp(
-            dir.y * 0.5 + 0.5,
-            0.0,
-            1.0
-        );
-
-
-    vec3 sky =
-        mix(
-            skyBottom,
-            skyTop,
-            pow(t, horizonSharpness)
-        );
-
-    // cloud
-    if (dir.y > 0.0) {
-        vec2 cloud_uv = dir.xz / (dir.y + 0.15) * 0.5 + vec2(time * 0.005, time * 0.002);
-        float cloud_density = fbm(cloud_uv * 2.0);
-        float safeLow = cloudThresholdLow;
-        float safeHigh = max(cloudThresholdHigh, cloudThresholdLow + 0.001);
-        cloud_density = smoothstep(safeLow,safeHigh, cloud_density);
-
-        
-        float fade = smoothstep(0.0, 0.3, dir.y) * (1.0 - smoothstep(0.85, 1.0, dir.y));
-        cloud_density *= fade;
-
-        vec3 cloud_color = mix(skyBottom, vec3(1.0), cloudWhiteMix); 
-        sky = mix(sky, cloud_color, cloud_density * 0.6);
-    }
-
-    float sunAmount = max(dot(dir, sund), 0.0);
-        
-    //float glow = pow(sunAmount, 8.0) * 0.15;
-        
-    float glow = pow(sunAmount, 8.0) * 0.15 + pow(sunAmount, 32.0) * 0.3;
-
-    sky += glow * sunColor;
-
-    return sky;
-}
 
 // Reconstruct eye-space coordinates from screen UV and depth buffer value
 vec3 reconstructViewPos(vec2 uv, float depth) {

include/Cubed/gameplay/cave_path.hpp

@@ -1,6 +1,5 @@
 #pragma once
 
-#include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/path_point.hpp"
 #include "Cubed/tools/cubed_random.hpp"
 
@@ -9,8 +8,6 @@
 namespace Cubed {
 
 class CavePath {
-    using ChunkPosSet =
-        tbb::concurrent_hash_map<ChunkPos, bool, ChunkPos::TBBHash>;
 
 public:
     CavePath(unsigned int chunk_seed, unsigned world_seed,

include/Cubed/gameplay/river.path.hpp

@@ -1,6 +1,5 @@
 #pragma once
 
-#include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/path_point.hpp"
 #include "Cubed/tools/cubed_random.hpp"
 
@@ -9,8 +8,6 @@
 
 namespace Cubed {
 class RiverPath {
-    using ChunkPosSet =
-        tbb::concurrent_hash_map<ChunkPos, bool, ChunkPos::TBBHash>;
 
 public:
     RiverPath(unsigned int chunk_seed, unsigned world_seed,
@@ -46,8 +43,6 @@ private:
     Random m_random;
 
     std::vector<PathPoint> m_points;
-    ChunkPosSet m_pending_chunks;
     void collect_path_points();
-    void precompute_chunk_coverage();
 };
 } // namespace Cubed

include/Cubed/gameplay/river_worm.hpp

@@ -1,7 +1,6 @@
 #pragma once
 #include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/path.hpp"
-#include "Cubed/tools/cubed_random.hpp"
 
 #include <glm/glm.hpp>
 #include <tbb/concurrent_hash_map.h>
@@ -25,7 +24,6 @@ public:
 
 private:
     std::atomic<unsigned> m_world_seed{0};
-    Random m_random;
     std::atomic<float> m_probability{0.01f};
 };
 

src/gameplay/river_worm.cpp

@@ -7,11 +7,7 @@ namespace Cubed {
 RiverWorm::RiverWorm() {}
 RiverWorm::~RiverWorm() {}
 
-void RiverWorm::init(unsigned world_seed) {
-    m_world_seed = world_seed;
-
-    m_random.init(m_world_seed);
-}
+void RiverWorm::init(unsigned world_seed) { m_world_seed = world_seed; }
 
 void RiverWorm::reload(unsigned world_seed) {
 

src/gameplay/vertex_data.cpp

@@ -63,6 +63,9 @@ void VertexData::upload() {
     glEnableVertexAttribArray(5);
     glBindVertexArray(0);
     glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+    // Release memory
+    m_vertices.clear();
 }
 void VertexData::update_sum() { m_sum = m_vertices.size(); }
 } // namespace Cubed

src/tools/shader_tools.cpp

@@ -5,11 +5,70 @@
 
 #include <filesystem>
 #include <fstream>
+#include <unordered_set>
 
 namespace Cubed {
 
 namespace fs = std::filesystem;
 
+namespace {
+
+bool is_include(const std::string& line) {
+
+    std::string_view sv(line);
+
+    auto first = sv.find_first_not_of(" \t");
+
+    return first != std::string::npos && sv.substr(first, 8) == "#include";
+}
+
+std::string parse_include(const std::string& line) {
+    auto pos = line.find("#include");
+    auto start = line.find_first_of("<\"", pos);
+    auto end = line.find_first_of(">\"", start + 1);
+
+    if (start == std::string::npos || end == std::string::npos) {
+        Logger::error("Invalid include: {}", line);
+        return {};
+    }
+    return line.substr(start + 1, end - start - 1);
+}
+
+void load_shader(std::string& source, const fs::path& file,
+                 std::unordered_set<fs::path>& included) {
+    if (!fs::is_regular_file(file)) {
+        Logger::error("File {} don't Exist!", file.string());
+        return;
+    }
+    auto canon = fs::canonical(file);
+    if (!included.insert(canon).second) {
+        return;
+    }
+    std::ifstream in(file);
+    if (!in.is_open()) {
+        Logger::error("Can't open {}", file.string());
+        return;
+    }
+    std::string line;
+    while (std::getline(in, line)) {
+        if (is_include(line)) {
+
+            auto include_file = file.parent_path() / parse_include(line);
+            source += "// begin include ";
+            source += include_file.string();
+            source += "\n";
+            load_shader(source, include_file, included);
+            source += "// end include ";
+            source += include_file.string();
+            source += "\n";
+        } else {
+            source.append(line + "\n");
+        }
+    }
+}
+
+} // namespace
+
 namespace Tools {
 
 GLuint create_shader_program(const std::string& v_shader_path,
@@ -102,19 +161,9 @@ bool check_opengl_error() {
 
 std::string read_shader_source(const std::string& file_path) {
     std::string content;
-    std::ifstream file_stream(file_path, std::ios::in);
-
-    if (!file_stream.is_open()) {
-        Logger::error("{} not exist", file_path);
-    }
-
-    std::string line = "";
-    while (!file_stream.eof()) {
-
-        getline(file_stream, line);
-        content.append(line + "\n");
-    }
-    file_stream.close();
+    fs::path path(file_path);
+    std::unordered_set<fs::path> included;
+    load_shader(content, path, included);
     return content;
 }