I am trying to render fluid inside a tank block with a TESR. The fluid I am trying to render in my tests is either water or lava.

 

This is my TESR:

    public void renderTileEntityAt(TileEntityFluidTank te, double x, double y, double z, float partialTicks, int destroyStage)
    {
        GlStateManager.pushMatrix();
        int capacity = te.getFluidHandler().getCapacity();
        FluidStack fluid = te.getFluidHandler().getFluid();
        if (fluid != null)
        {
            Tessellator tess = Tessellator.getInstance();
            VertexBuffer buffer = tess.getBuffer();

            buffer.setTranslation(x, y, z);

            bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);
            TextureAtlasSprite still = Minecraft.getMinecraft().getTextureMapBlocks().getAtlasSprite(fluid.getFluid().getStill().toString());
            TextureAtlasSprite flow =  Minecraft.getMinecraft().getTextureMapBlocks().getAtlasSprite(fluid.getFluid().getFlowing().toString());

            double posY = .1 + (.8 * ((float) fluid.amount / (float) capacity));
            float[] color = ClientUtils.getRGBAFloatArrayFromHexColor(fluid.getFluid().getColor(fluid));

            buffer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX_COLOR);
            buffer.pos( 4/16, posY,  4/16).tex(still.getInterpolatedU( 4), still.getInterpolatedV( 4)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos(12/16, posY,  4/16).tex(still.getInterpolatedU(12), still.getInterpolatedV( 4)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos(12/16, posY, 12/16).tex(still.getInterpolatedU(12), still.getInterpolatedV(12)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos( 4/16, posY, 12/16).tex(still.getInterpolatedU( 4), still.getInterpolatedV(12)).color(color[0], color[1], color[2], color[3]).endVertex();
            tess.draw();

            buffer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX_COLOR);
            buffer.pos(12/16, 1/16, 12/16).tex(flow.getInterpolatedU(12), flow.getInterpolatedV(15)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos(12/16, posY, 12/16).tex(flow.getInterpolatedU(12), flow.getInterpolatedV( 1)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos( 4/16, posY, 12/16).tex(flow.getInterpolatedU( 4), flow.getInterpolatedV( 1)).color(color[0], color[1], color[2], color[3]).endVertex();
            buffer.pos( 4/16, 1/16, 12/16).tex(flow.getInterpolatedU( 4), flow.getInterpolatedV(15)).color(color[0], color[1], color[2], color[3]).endVertex();
            tess.draw();

            buffer.setTranslation(0, 0, 0);
        }
        GlStateManager.popMatrix();
    }

 

This code currently only renders two sides of the five sides that need to be rendered (or at least it should). Instead of rendering the water or lava texture, it renders nothing.

Two things, did you bind the TESR, and the next being did you let the client know that there is a fluid inside of it.

The client is properly updated. I will recheck if I bound it correctly, I might have forgotten that this time  .

I checked again and the TESR is properly bound and the call even enters into the if statement. So there must be something off with my use of the tesselator.

You are using integer division everywhere (

12/16

), which will always be rounded down (12/16 = 0.75 = 0). To do proper division with decimals, use

floats

(12F/16F = 0.75F).

Oh, right, face palm  . Let's see if that fixes it.

That fixed it, thank you.