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[SOLVED] Change block properties in an if statement.


Flayr

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Thanks for the response, at this point I was already planning on making it check weather the player is holding the staff in the EntityRenderer but I could not find a way to implement the code I used in the block class (it needs the world object as an input to check for players holding the staff). Do you have any ideas for the actual code that I could put in LightRenderer.java that checks if the player is holding the staff?

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Hi

 

You could try

 

if (Minecraft.getMinecraft().thePlayer().getHeldItem().getItem().itemID == myLightStaffID) {

  // staff is held so render

}

 

This must be in the renderer only, i.e. it can only work on the client side.  If it works at all, which I'm not sure :-P

 

-TGG

That doesnt work, thePlayer does not exist in Minecraft, the problem I have is how to refer to the correct player from within the renderer code. Do you know how to do that?

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Hi

 

You mean, thePlayer() doesn't exist in Minecraft class. But thePlayer exists in Minecraft class

 

:-[ oops!

 

This time I'll type it into my code and make sure it compiles!....

 

if (Minecraft.getMinecraft().thePlayer.getHeldItem().getItem().itemID == myLightStaffID) {
      // staff is held so render it
    }

 

-TGG

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Hi

 

You mean, thePlayer() doesn't exist in Minecraft class. But thePlayer exists in Minecraft class

 

:-[ oops!

 

This time I'll type it into my code and make sure it compiles!....

 

if (Minecraft.getMinecraft().thePlayer.getHeldItem().getItem().itemID == myLightStaffID) {
      // staff is held so render it
    }

 

-TGG

 

Okay so if I spawn in lightInv it is invisible and in I make lightInv with the staff it is visible, but whenever I change equip or unequipped the staff respectively it crashes.

 

package flayr.magiclights.tileentities;

import java.util.List;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import flayr.magiclights.MagicLights;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;

public class LightInvRenderer extends TileEntitySpecialRenderer{
@SideOnly(Side.CLIENT)
    public void renderTileEntityAt(TileEntity tileentity, double x, double y, double z, float f) {

	if (Minecraft.getMinecraft().thePlayer.getHeldItem().getItem().itemID == MagicLights.lightStaff.itemID) {

	ResourceLocation rl = new ResourceLocation("magiclights:textures/blocks/lightInv.png");
	Minecraft.getMinecraft().renderEngine.bindTexture(rl);

	Tessellator tessellator = Tessellator.instance;
        GL11.glPushMatrix();
        GL11.glTranslated(x+0.5, y+0.5, z+0.5);
        GL11.glNormal3f(0.0F, 10.0F, 0.0F);
        GL11.glRotatef(-this.tileEntityRenderer.playerYaw, 0.0F, 1.0F, 0.0F);
        GL11.glRotatef(this.tileEntityRenderer.playerPitch, 1.0F, 0.0F, 0.0F);
        
        tessellator.startDrawingQuads();
        
        tessellator.addVertexWithUV(-0.5, 0.5, 0, 1, 0);
        tessellator.addVertexWithUV(0.5, 0.5, 0, 1, 1);
        tessellator.addVertexWithUV(-0.5, -0.5, 0, 0, 0);
        tessellator.addVertexWithUV(0.5, -0.5, 0, 0, 1);
        
        tessellator.addVertexWithUV(0.5, -0.5, 0, 1, 0);
        tessellator.addVertexWithUV(-0.5, -0.5, 0, 0, 0);
        tessellator.addVertexWithUV(0.5, 0.5, 0, 1, 1);
        tessellator.addVertexWithUV(-0.5, 0.5, 0, 0, 1);

        tessellator.draw();
        GL11.glPopMatrix();
	}
}
}

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Hi

 

It would help if you showed us the crash error message... :-)

 

If it's only just started when you added the renderer code, it's probably a Null Pointer Exception on the item, try

 

ItemStack heldItem = Minecraft.getMinecraft().thePlayer.getHeldItem();

if (heldItem != null && heldItem.getItem().itemID == myLightStaffID) {

 

-TGG

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