Main hand item use animation plays when using offhand (3rd person mode)

Confirmed

Confirmed for 15w44b.

Still an issue in 15w47c.

Not fixed.

Still an issue in 1.9-pre2. Particularly odd when using a bow in the off-hand.

not fixed in <insert minecraft version here>
or
confirmed for <insert minecraft version here>
are usefull
no fix :/
isn't as usefull at all

Confirmed for

• 1.9-pre3

Please link to this comment in the description

The following is based on decompiled version of Minecraft 1.9 using MCP 9.24 beta. All method and class names are the names used in the decompiled version.

The reason why this happens is because the method net.minecraft.client.model.ModelBiped.setRotationAngles(float, float, float, float, float, float, Entity) is using the method net.minecraft.client.model.ModelBiped.getMainHand(Entity) to determine the hand the animation should play for, which is as the name suggests always the mainhand.

/**
 * Sets the model's various rotation angles. For bipeds, par1 and par2 are used for animating the movement of arms
 * and legs, where par1 represents the time(so that arms and legs swing back and forth) and par2 represents how
 * "far" arms and legs can swing at most.
 */
public void setRotationAngles(float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch, float scaleFactor, Entity entityIn)
{
    //...

    if (this.swingProgress > 0.0F)
    {
        EnumHandSide enumhandside = this.getMainHand(entityIn);
        
        // Added this
        if (entityIn instanceof EntityLivingBase && !(((EntityLivingBase) entityIn).field_184622_au == EnumHand.MAIN_HAND)) {
            enumhandside = enumhandside.opposite();
        }
        
        //...
    }
    
    //...
}

Confirmed for 1.9.3-pre3

Confirmed for 16w21b