From 994d2c93eae660345c1d74d329303a55e58e270e Mon Sep 17 00:00:00 2001
From: IntegratedQuantum <jahe788@gmail.com>
Date: Mon, 25 Nov 2024 17:52:49 +0100
Subject: [PATCH] Allow breaking single torches and carpets from a given block,
 instead of breaking all at once.

fixes #798
---
 src/rotation.zig | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/rotation.zig b/src/rotation.zig
index 739193333..afab3fa2a 100644
--- a/src/rotation.zig
+++ b/src/rotation.zig
@@ -680,20 +680,33 @@ pub const RotationModes = struct {
 			return true;
 		}
 
-		pub fn rayIntersection(block: Block, _: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) ?RayIntersectionResult {
+		fn closestRay(comptime typ: enum{bit, intersection}, block: Block, _: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) if(typ == .intersection) ?RayIntersectionResult else u16 {
 			var result: ?RayIntersectionResult = null;
+			var resultBit: u16 = 0;
 			for([_]u16{1, 2, 4, 8, 16}) |bit| {
 				if(block.data & bit != 0) {
 					const modelIndex = blocks.meshes.modelIndexStart(block) + bit - 1;
 					if(RotationMode.DefaultFunctions.rayModelIntersection(modelIndex, relativePlayerPos, playerDir)) |intersection| {
 						if(result == null or result.?.distance > intersection.distance) {
 							result = intersection;
+							resultBit = bit;
 						}
 					}
 				}
 			}
+			if(typ == .bit) return resultBit;
 			return result;
 		}
+
+		pub fn rayIntersection(block: Block, item: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) ?RayIntersectionResult {
+			return closestRay(.intersection, block, item, relativePlayerPos, playerDir);
+		}
+
+		pub fn onBlockBreaking(item: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f, currentData: *Block) void {
+			const bit = closestRay(.bit, currentData.*, item, relativePlayerPos, playerDir);
+			currentData.data &= ~bit;
+			if(currentData.data == 0) currentData.typ = 0;
+		}
 	};
 	pub const Carpet = struct { // MARK: Carpet
 		pub const id: []const u8 = "carpet";
@@ -823,20 +836,33 @@ pub const RotationModes = struct {
 			return true;
 		}
 
-		pub fn rayIntersection(block: Block, _: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) ?RayIntersectionResult {
+		fn closestRay(comptime typ: enum{bit, intersection}, block: Block, _: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) if(typ == .intersection) ?RayIntersectionResult else u16 {
 			var result: ?RayIntersectionResult = null;
+			var resultBit: u16 = 0;
 			for([_]u16{1, 2, 4, 8, 16, 32}) |bit| {
 				if(block.data & bit != 0) {
 					const modelIndex = blocks.meshes.modelIndexStart(block) + bit - 1;
 					if(RotationMode.DefaultFunctions.rayModelIntersection(modelIndex, relativePlayerPos, playerDir)) |intersection| {
 						if(result == null or result.?.distance > intersection.distance) {
 							result = intersection;
+							resultBit = bit;
 						}
 					}
 				}
 			}
+			if(typ == .bit) return resultBit;
 			return result;
 		}
+
+		pub fn rayIntersection(block: Block, item: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f) ?RayIntersectionResult {
+			return closestRay(.intersection, block, item, relativePlayerPos, playerDir);
+		}
+
+		pub fn onBlockBreaking(item: ?main.items.Item, relativePlayerPos: Vec3f, playerDir: Vec3f, currentData: *Block) void {
+			const bit = closestRay(.bit, currentData.*, item, relativePlayerPos, playerDir);
+			currentData.data &= ~bit;
+			if(currentData.data == 0) currentData.typ = 0;
+		}
 	};
 };