[1.10.2] Changing render "origin" of a baked model...

[OreCruncher]

Currently my render can render an existing baked model for a block (for example Dirt) at a point in the world.  However, when I rotate the model (GlStateManager.rotate) it rotates relative to one of it's corners.  What I want to do is shift the origin from the corner to the center of the block so that when I do the rotations it will behave the way I want.

 

I am hoping for something easy.  I really don't want to dust off my old math texts to do some fancy math.  I am getting to old for that.

[Leviathan143]

Can we please see the code you are using to render the baked model?

[OreCruncher]

	public void renderParticle(VertexBuffer worldRendererIn, Entity entityIn, float partialTicks, float rotationX,
		float rotationZ, float rotationYZ, float rotationXY, float rotationXZ) {

	final float x = ((float) (this.prevPosX + (this.posX - this.prevPosX) * partialTicks - interpPosX));
	final float y = ((float) (this.prevPosY + (this.posY - this.prevPosY) * partialTicks - interpPosY));
	final float z = ((float) (this.prevPosZ + (this.posZ - this.prevPosZ) * partialTicks - interpPosZ));

	final float xRotation = MathStuff.wrapDegrees(this.xPeriod + this.xRotationRate * partialTicks);
	final float yRotation = MathStuff.wrapDegrees(this.yPeriod + this.yRotationRate * partialTicks);
	final float zRotation = MathStuff.wrapDegrees(this.zPeriod + this.zRotationRate * partialTicks);

	Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);

        GlStateManager.enableRescaleNormal();
	GlStateManager.pushMatrix();
	GlStateManager.pushAttrib();

	GlStateManager.translate(x, y, z);
	GlStateManager.scale(this.scale, this.scale, this.scale);

	GlStateManager.rotate(xRotation, 1.0F, 0, 0);
	GlStateManager.rotate(yRotation, 0, 1.0F, 0);
	GlStateManager.rotate(zRotation, 0, 0, 1.0F);
        
        final int i = this.getBrightnessForRender(partialTicks);
        final int j = i % 65536;
        final int k = i / 65536;
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, (float)j, (float)k);
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
        final BlockRendererDispatcher blockrendererdispatcher = Minecraft.getMinecraft().getBlockRendererDispatcher();
        blockrendererdispatcher.renderBlockBrightness(this.state, 1.0F);
        
        GlStateManager.color(1, 1, 1, 1);
	GlStateManager.popAttrib();
	GlStateManager.popMatrix();
        GlStateManager.disableRescaleNormal();
}

 

This all works except the render "origin" of the block is one of it's corners.  I just want to convince the model that it's actually been shifted so instead of rendering along an axis "0..10" it's something like "-5..5".

[Draco18s]

translate(-0.5,-0.5,-0.5)

rotate(x,y,z,w)

translate(0.5,0.5,0.5)

[OreCruncher]

*Picks himself off the floor - blinks*

 

OK.  Got that working.  What I think happened is that I tried something similar to this but one of the values for the translation was off.  Maybe I need to stop writing code at such late hours of the evening.

 

For posterity here is the updated code:

 

	public void renderParticle(VertexBuffer worldRendererIn, Entity entityIn, float partialTicks, float rotationX,
		float rotationZ, float rotationYZ, float rotationXY, float rotationXZ) {

	final float x = ((float) (this.prevPosX + (this.posX - this.prevPosX) * partialTicks - interpPosX));
	final float y = ((float) (this.prevPosY + (this.posY - this.prevPosY) * partialTicks - interpPosY));
	final float z = ((float) (this.prevPosZ + (this.posZ - this.prevPosZ) * partialTicks - interpPosZ));

	final float pitch = MathStuff.wrapDegrees(this.currentPitch + this.pitchRate * partialTicks);
	final float yaw = MathStuff.wrapDegrees(this.currentYaw + this.yawRate * partialTicks);
	final float roll = MathStuff.wrapDegrees(this.currentRoll + this.rollRate * partialTicks);

	Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);

	GlStateManager.enableRescaleNormal();
	GlStateManager.pushMatrix();
	GlStateManager.pushAttrib();

	GlStateManager.translate(x, y, z);
	GlStateManager.scale(this.scale, this.scale, this.scale);

	GlStateManager.rotate(roll, 0, 0, 1.0F);
	GlStateManager.rotate(pitch, 1.0F, 0, 0);
	GlStateManager.rotate(yaw, 0, 1.0F, 0);
	GlStateManager.translate(-0.5F, -0.5F, 0.5F);

	final int i = this.getBrightnessForRender(partialTicks);
	final int j = i % 65536;
	final int k = i / 65536;
	OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, (float) j, (float) k);

	GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
	final BlockRendererDispatcher blockrendererdispatcher = Minecraft.getMinecraft().getBlockRendererDispatcher();
	blockrendererdispatcher.renderBlockBrightness(this.state, 1.0F);

	GlStateManager.color(1, 1, 1, 1);
	GlStateManager.popAttrib();
	GlStateManager.popMatrix();
	GlStateManager.disableRescaleNormal();
}