Minecraft Forums

Hello guys,

I am getting really confused now...

I need someone who can explain me OpenGL Rendering. I already have an entity which extends EntityThrowable.

The only thing I have right now is this code (copied it from there out of the method "renderBoomerang"): https://github.com/Ckathode/balkons-weaponmod/blob/master/src/main/java/ckathode/weaponmod/render/RenderBoomerang.java

Can someone explain me the basics of OpenGL programming? The only things I know are those:
GL11.glPushMatrix(); is the beginning of OpenGL Rendering, GL11.glPopMatrix(); is the end

and some things

What I need to know:
What does those methods do:
addVertexWithUV(...)

glNormal3f(...)

startDrawingQuads(...)

setColorOpaque_F(...)

GL11.glTranslatef(...)
GL11.glColor3f

and the parameters of the renderBoomerang(...)

and last but not least: What should I do, when I want to render a cube (I mean an entity with the form of a cube)

I am really looking forward to your answer! I need every help!

Other websites don't explain it the way I understand...

Direct work with OpenGL can be a bit of a pain. I don't know a lot about it but here is a good start.

http://greyminecraftcoder.blogspot.co.at/2014/12/the-tessellator-and-worldrenderer-18.html

Minecraft has some wrapper methods for gl11 I believe, it might be good to use those in the event of an OpenGL or lwjgl change in the future. Looking through some of the vanilla classes, especially in the client.renderer.entity folder has helped me out in the past. When you can, use techne to create models, minecraft will do all the hard stuff for you. Sorry this isn't a lot, but it's better than none.

I a,ready knew this link, but thanks anyway. I will definetly look through the vanilla classes. But could you explain me more about techne? I had it installed already, but i can only use it fornormal entities i believe. Because when I save a java code, it extends some mob classes.

Techne? It is basically just a helper for vertices and normals. Instead of doing

GL11.glPushMatrix():

GL11.glRotatef(....);

GL11.glRotatef(....);

GL11.glRotatef(....);

WorldRenderer.addVericies to make a square Kinda like this but without all the try and catch

Tessellator.instance.draw(); (why mc? Why do I have to use 2 classes at the same time to render stuff in 1.8?)

GL11.glPopMatrix():

you can do

box.setRotationAngles(....);

box.draw();

Yeah, techne only really helps for basic mob shapes, cubes and such. Not quite sure what the class you gave a link to is trying to do... If you are trying to make an entity throwable minecraft has a render class for you to use, you just pass in the item (and metadata in 1.7).

The class adds a Renderer for a boomerang...

I tried to use my techne model for my EntityThrowable... But I can't get it working. Here is my code (under java/org/silvercatcher/reforged/render/ModelBulletMusket): https://github.com/ThexXTURBOXx/Reforged/

What part isn't working?

Edit: I tired it and everything seems to work.

I already fixed my code It was 5 days ago. But thanks anyway, friend ^^