Getting the block a player is looking at?

[sytone]

I am trying to determine if a player is looking at a chest or not, I have looked through the Entity and the Look helper but I have not seen anything that helps. Is there anything that helps determine what a player is looking at in the code or do I have to get the player facing direction and eye height and mathematically walk the line of site and test for a block at each point until I hit !air or chest.

 

If so any examples as I am being lazy and my trig is rusty

[Draco18s]

float f = 1.0F;
                        float f1 = p.prevRotationPitch + (p.rotationPitch - p.prevRotationPitch) * f;
                        float f2 = p.prevRotationYaw + (p.rotationYaw - p.prevRotationYaw) * f;
                        double d0 = p.prevPosX + (p.posX - p.prevPosX) * (double)f;
                        double d1 = p.prevPosY + (p.posY - p.prevPosY) * (double)f + 1.62D - (double)p.yOffset;
                        double d2 = p.prevPosZ + (p.posZ - p.prevPosZ) * (double)f;
                        Vec3 vec3 = world.getWorldVec3Pool().getVecFromPool(d0, d1, d2);
                        float f3 = MathHelper.cos(-f2 * 0.017453292F - (float)Math.PI);
                        float f4 = MathHelper.sin(-f2 * 0.017453292F - (float)Math.PI);
                        float f5 = -MathHelper.cos(-f1 * 0.017453292F);
                        float f6 = MathHelper.sin(-f1 * 0.017453292F);
                        float f7 = f4 * f5;
                        float f8 = f3 * f5;
                        double d3 = 5.0D;
                        Vec3 vec31 = vec3.addVector((double)f7 * d3, (double)f6 * d3, (double)f8 * d3);
                        MovingObjectPosition movingobjectposition = world.rayTraceBlocks_do_do(vec3, vec31, false, true);
                        if (movingobjectposition == null) {
                        	return;
                        }
                        if (movingobjectposition.typeOfHit == EnumMovingObjectType.TILE)
                        {
                            int ix = movingobjectposition.blockX;
                            int iy = movingobjectposition.blockY;
                            int iz = movingobjectposition.blockZ;
                            //block is at ix, iy, iz
                        }

[sytone]

Flipin awesome! That saved some math

 

I had a sinking feeling that this would have been needed and I would be pulling out my old 3d math logic

 

 

[Draco18s]

Flipin awesome! That saved some math

 

I had a sinking feeling that this would have been needed and I would be pulling out my old 3d math logic

 

TBH, I yoinked that out of the....boat code.