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[1.15.2] Checking if entity or player is looking at another entity


SSilvamc

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I've seen some ways on how to go about doing this for extended sword reach (checks entities in surrounding AABB, checks if the length of the vector from the player's eye to an entity is within said range, checks the angle, then hits the entity). I found an example of this being applied in the Aether mod's source code (here) which with just a few changes works well in 1.15.2.

The thing is, I was trying to think of another ways to make this work. For instance, I'd like to use the player's eyesight vector and ray trace from there to a certain length (say, 8 blocks' distance) and check if the ray hits an entity's bounding box. This way, I wouldn't need to check all the surrounding entities.

Endermen use the canEntityBeSeen method, and that one draws a vector and checks that it doesn't collide with any blocks. The problem is, this method already knows the position of both the enderman in question and the player.

One option was to use a method found in the Minecraft class, but of course, that would only work client-side.

 

Also, by the way, is there any replacement for onEntitySwing on 1.15.2? I've been using onItemRightClick for now to test, but I want to check for entities using it (so a skeleton, for instance, can use it as a sword). Which method would I have to override?

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Figured I'd use one vector for the player's look, and then a second vector which is a scaling of the first based on the distance I want. This works in order to create a RayTraceResult for blocks, but how would I go about doing this on entities?

Also, is ray tracing only client-side?

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up to 2147483648 bytes (2048 MiB)       CPUs: 16       Processor Vendor: GenuineIntel       Processor Name: 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz       Identifier: Intel64 Family 6 Model 141 Stepping 1       Microarchitecture: unknown       Frequency (GHz): 2.30       Number of physical packages: 1       Number of physical CPUs: 8       Number of logical CPUs: 16       Graphics card #0 name: Intel(R) UHD Graphics       Graphics card #0 vendor: Intel Corporation (0x8086)       Graphics card #0 VRAM (MB): 1024.00       Graphics card #0 deviceId: 0x9a60       Graphics card #0 versionInfo: DriverVersion=31.0.101.1999       Graphics card #1 name: NVIDIA GeForce RTX 3060 Laptop GPU       Graphics card #1 vendor: NVIDIA (0x10de)       Graphics card #1 VRAM (MB): 4095.00       Graphics card #1 deviceId: 0x2560       Graphics card #1 versionInfo: DriverVersion=31.0.15.2892       Memory slot #0 capacity (MB): 8192.00       Memory slot #0 clockSpeed (GHz): 3.20       Memory slot #0 type: 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Client (map_client.txt)       Graphics mode: fast       Render Distance: 12/12 chunks       Resource Packs:       Current Language: en_us       Locale: en_US       CPU: 16x 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz       ModLauncher: 10.1.2       ModLauncher launch target: forge_client       ModLauncher naming: srg       ModLauncher services:             / slf4jfixer PLUGINSERVICE             / runtimedistcleaner PLUGINSERVICE             / runtime_enum_extender PLUGINSERVICE             / object_holder_definalize PLUGINSERVICE             / capability_token_subclass PLUGINSERVICE             / accesstransformer PLUGINSERVICE             / eventbus PLUGINSERVICE             / mixin PLUGINSERVICE             / fml TRANSFORMATIONSERVICE             / mixin TRANSFORMATIONSERVICE       FML Language Providers:             minecraft@1.0             lowcodefml@49             javafml@49.0.30       Mod List:             forge-1.20.4-49.0.30-client.jar                   |Minecraft                     |minecraft                     |1.20.4              |COMMON_SET|Manifest: NOSIGNATURE             forge-1.20.4-49.0.30-universal.jar                |Forge                         |forge                         |49.0.30             |COMMON_SET|Manifest: NOSIGNATURE       Crash Report UUID: 5380853b-d030-466a-8c5e-5c81ce00053c       FML: 0.0       Forge: net.minecraftforge:49.0.30
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