From 64f6f1738616f747a5956e4c4f023fb34e329f74 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Tue, 5 Dec 2023 10:25:43 +0300
Subject: [PATCH] AABB blocks rotation support (WIP part 3)

---
 src/content/Content.cpp         | 24 ++++++++++--------------
 src/graphics/BlocksRenderer.cpp |  6 ------
 src/voxels/Block.cpp            |  1 +
 src/voxels/Block.h              |  5 +++--
 src/voxels/Chunks.cpp           | 11 +++++++----
 5 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/src/content/Content.cpp b/src/content/Content.cpp
index 64d986d0..5322a98d 100644
--- a/src/content/Content.cpp
+++ b/src/content/Content.cpp
@@ -27,20 +27,14 @@ Content* ContentBuilder::build() {
         // Generating runtime info
         def->rt.id = blockDefsIndices.size();
         def->rt.emissive = *((uint32_t*)def->emission);
-        
-        // building hitbox grid 3d for raycasts
-        const AABB& hitbox = def->hitbox;
-        for (uint gy = 0; gy < BLOCK_AABB_GRID; gy++) {
-            for (uint gz = 0; gz < BLOCK_AABB_GRID; gz++) {
-                for (uint gx = 0; gx < BLOCK_AABB_GRID; gx++) {
-                    float x = gx / float(BLOCK_AABB_GRID);
-                    float y = gy / float(BLOCK_AABB_GRID);
-                    float z = gz / float(BLOCK_AABB_GRID);
-                    bool flag = hitbox.inside({x, y, z});
-                    if (!flag)
-                        def->rt.solid = false;
-                    def->rt.hitboxGrid[gy][gz][gx] = flag;
-                }
+        def->rt.solid = def->model == BlockModel::block;
+
+        if (def->rotatable) {
+            const AABB& hitbox = def->hitbox;
+            for (uint i = 0; i < BlockRotProfile::MAX_COUNT; i++) {
+                AABB aabb = hitbox;
+                def->rotations.variants[i].transform(aabb);
+                def->rt.hitboxes[i] = aabb;
             }
         }
 
@@ -48,6 +42,8 @@ Content* ContentBuilder::build() {
         if (groups->find(def->drawGroup) == groups->end()) {
             groups->insert(def->drawGroup);
         }
+
+
     }
     ContentIndices* indices = new ContentIndices(blockDefsIndices);
     return new Content(indices, groups, blockDefs);
diff --git a/src/graphics/BlocksRenderer.cpp b/src/graphics/BlocksRenderer.cpp
index f9a9f573..fcd72ad8 100644
--- a/src/graphics/BlocksRenderer.cpp
+++ b/src/graphics/BlocksRenderer.cpp
@@ -372,7 +372,6 @@ vec4 BlocksRenderer::pickSoftLight(float x, float y, float z,
 	return pickSoftLight({int(round(x)), int(round(y)), int(round(z))}, right, up);
 }
 
-#include <iostream>
 void BlocksRenderer::render(const voxel* voxels) {
 	int begin = chunk->bottom * (CHUNK_W * CHUNK_D);
 	int end = chunk->top * (CHUNK_W * CHUNK_D);
@@ -410,14 +409,9 @@ void BlocksRenderer::render(const voxel* voxels) {
 				AABB hitbox = def.hitbox;
 				hitbox.a = vec3(1.0f)-hitbox.a;
 				hitbox.b = vec3(1.0f)-hitbox.b;
-				std::cout << hitbox.a.x << " " << hitbox.a.y << " " << hitbox.a.z << " --- ";
-				std::cout << hitbox.b.x << " " << hitbox.b.y << " " << hitbox.b.z << std::endl;
 
 				vec3 size = hitbox.size();
-
-				std::cout << "s " << size.x << " " << size.y << " " << size.z << std::endl;
 				vec3 off = hitbox.min();
-				std::cout << "m " << off.x << " " << off.y << " " << off.z << std::endl;
 				blockCubeShaded(ivec3(x,y,z), off, size, texfaces, &def, vox.states);
 				break;
 			}
diff --git a/src/voxels/Block.cpp b/src/voxels/Block.cpp
index 085646ed..d794cfbc 100644
--- a/src/voxels/Block.cpp
+++ b/src/voxels/Block.cpp
@@ -30,4 +30,5 @@ Block::Block(std::string name)
 
 Block::Block(std::string name, std::string texture) : name(name),
 		textureFaces{texture,texture,texture,texture,texture,texture} {
+	rotations = BlockRotProfile::PIPE;
 }
diff --git a/src/voxels/Block.h b/src/voxels/Block.h
index fa6002db..8aa90ed1 100644
--- a/src/voxels/Block.h
+++ b/src/voxels/Block.h
@@ -28,7 +28,8 @@ struct CoordSystem {
 };
 
 struct BlockRotProfile {
-	CoordSystem variants[16];
+	static const int MAX_COUNT = 16;
+	CoordSystem variants[MAX_COUNT];
 
 	/* Wood logs, pillars, pipes
 	   3 orientations supported
@@ -65,7 +66,7 @@ public:
 		blockid_t id;
 		bool solid = true;
 		bool emissive = false;
-		bool hitboxGrid[BLOCK_AABB_GRID][BLOCK_AABB_GRID][BLOCK_AABB_GRID];
+		AABB hitboxes[BlockRotProfile::MAX_COUNT];
 	} rt;
 
 	Block(std::string name);
diff --git a/src/voxels/Chunks.cpp b/src/voxels/Chunks.cpp
index c98781c6..698e6385 100644
--- a/src/voxels/Chunks.cpp
+++ b/src/voxels/Chunks.cpp
@@ -73,11 +73,14 @@ const AABB* Chunks::isObstacle(float x, float y, float z){
 		return nullptr;
 	const Block* def = contentIds->getBlockDef(v->id);
 	if (def->obstacle) {
+		const AABB& hitbox = def->rotatable 
+							 ? def->rt.hitboxes[v->states & BLOCK_ROT_MASK] 
+							 : def->hitbox;
 		if (def->rt.solid) {
-			return &def->hitbox;
+			return &hitbox;
 		} else {
-			if (def->hitbox.inside({x - ix, y - iy, z - iz}))
-				return &def->hitbox;
+			if (hitbox.inside({x - ix, y - iy, z - iz}))
+				return &hitbox;
 			return nullptr;
 		}
 	}
@@ -222,7 +225,7 @@ voxel* Chunks::rayCast(vec3 start,
 			// TODO: replace this dumb solution with something better
 			if (def && !def->rt.solid) {
 				const int gridSize = BLOCK_AABB_GRID * 2;
-				const AABB& box = def->hitbox;
+				const AABB& box = def->rotatable ? def->rt.hitboxes[voxel->states & BLOCK_ROT_MASK] : def->hitbox;
 				const int subs = gridSize;
 				iend = vec3(ix, iy, iz);
 				end -= iend;