From 13a96413922ce46e32e03bb1606a8512117521bf Mon Sep 17 00:00:00 2001
From: "@clasher113" <kizinvanya@gmail.com>
Date: Wed, 22 Nov 2023 19:15:26 +0200
Subject: [PATCH] BlocksRenderer light conpressing & fix

---
 res/shaders/main.glslv          | 19 ++++++++++++++-----
 src/graphics/BlocksRenderer.cpp | 19 +++++++++++++------
 src/window/Window.cpp           |  1 +
 3 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/res/shaders/main.glslv b/res/shaders/main.glslv
index b1412148..ccd89eaa 100644
--- a/res/shaders/main.glslv
+++ b/res/shaders/main.glslv
@@ -2,7 +2,7 @@
 
 layout (location = 0) in vec3 v_position;
 layout (location = 1) in vec2 v_texCoord;
-layout (location = 2) in vec4 v_light;
+layout (location = 2) in float v_light;
 
 out vec4 a_color;
 out vec2 a_texCoord;
@@ -18,18 +18,27 @@ uniform float u_gamma;
 uniform vec3 u_torchlightColor;
 uniform float u_torchlightDistance;
 
+vec4 decompress_light(float compressed_light) {
+	vec4 result;
+    int compressed = floatBitsToInt(compressed_light);
+    result.r = ((compressed >> 24) & 0xFF) / 255.f;
+    result.g = ((compressed >> 16) & 0xFF) / 255.f;
+    result.b = ((compressed >> 8) & 0xFF) / 255.f;
+    result.a = (compressed & 0xFF) / 255.f;
+	return result;
+}
+
 void main(){
 	vec2 pos2d = (u_model * vec4(v_position, 1.0)).xz-u_cameraPos.xz;
 	vec4 modelpos = u_model * vec4(v_position+vec3(0,pow(length(pos2d)*0.0, 3.0),0), 1.0);
 	vec4 viewmodelpos = u_view * modelpos;
-	vec3 light = v_light.rgb * 1.6;
+	vec4 decomp_light = decompress_light(v_light);
+	vec3 light = decomp_light.rgb * 1.6;
 	float torchlight = max(0.0, 1.0-distance(u_cameraPos, modelpos.xyz)/u_torchlightDistance);
 	light += torchlight * u_torchlightColor;
 	a_color = vec4(pow(light, vec3(u_gamma)),1.0f);
 	a_texCoord = v_texCoord;
-	a_color.r = max(a_color.r, u_skyLightColor.r*v_light.a);
-	a_color.g = max(a_color.g, u_skyLightColor.g*v_light.a);
-	a_color.b = max(a_color.b, u_skyLightColor.b*v_light.a);
+	a_color.rgb = max(a_color.rgb, u_skyLightColor.rgb*decomp_light.a);
 	a_distance = length(viewmodelpos);
 	gl_Position = u_proj * viewmodelpos;
 }
diff --git a/src/graphics/BlocksRenderer.cpp b/src/graphics/BlocksRenderer.cpp
index 4caabf92..a11ea203 100644
--- a/src/graphics/BlocksRenderer.cpp
+++ b/src/graphics/BlocksRenderer.cpp
@@ -17,7 +17,7 @@ using glm::ivec3;
 using glm::vec3;
 using glm::vec4;
 
-#define VERTEX_SIZE 9
+#define VERTEX_SIZE 6
 
 BlocksRenderer::BlocksRenderer(size_t capacity, 
 							   const Content* content, 
@@ -50,10 +50,17 @@ void BlocksRenderer::vertex(const vec3& coord,
 	vertexBuffer[vertexOffset++] = u;
 	vertexBuffer[vertexOffset++] = v;
 
-	vertexBuffer[vertexOffset++] = light.r;
-	vertexBuffer[vertexOffset++] = light.g;
-	vertexBuffer[vertexOffset++] = light.b;
-	vertexBuffer[vertexOffset++] = light.a;
+	union {
+		float floating;
+		uint32_t integer;
+	} compressed;
+
+	compressed.integer = (uint32_t(light.r * 255) & 0xff) << 24;
+	compressed.integer |= (uint32_t(light.g * 255) & 0xff) << 16;
+	compressed.integer |= (uint32_t(light.b * 255) & 0xff) << 8;
+	compressed.integer |= (uint32_t(light.a * 255) & 0xff);
+
+	vertexBuffer[vertexOffset++] = compressed.floating;
 }
 
 void BlocksRenderer::index(int a, int b, int c, int d, int e, int f) {
@@ -353,7 +360,7 @@ Mesh* BlocksRenderer::render(const Chunk* chunk, int atlas_size, const ChunksSto
 	const voxel* voxels = chunk->voxels;
 	render(voxels, atlas_size);
 
-	const vattr attrs[]{ {3}, {2}, {4}, {0} };
+	const vattr attrs[]{ {3}, {2}, {1}, {0} };
 	Mesh* mesh = new Mesh(vertexBuffer, vertexOffset / VERTEX_SIZE, indexBuffer, indexSize, attrs);
 	return mesh;
 }
diff --git a/src/window/Window.cpp b/src/window/Window.cpp
index c60be618..562e6f67 100644
--- a/src/window/Window.cpp
+++ b/src/window/Window.cpp
@@ -38,6 +38,7 @@ void mouse_button_callback(GLFWwindow*, int button, int action, int) {
 }
 
 void key_callback(GLFWwindow*, int key, int scancode, int action, int /*mode*/) {
+	if (key == GLFW_KEY_UNKNOWN) return;
 	if (action == GLFW_PRESS) {
 		Events::_keys[key] = true;
 		Events::_frames[key] = Events::_current;