RenderBlockArrows.java 文件源码

private void drawArrow(float progress) {
    double arrowBaseWidth = 0.4D;
    double arrowBaseLength = 0.8D;
    double arrowLength = 1.5D;
    double arrowWidth = 0.7D;
    double scale = 0.1D;
    GL11.glPushMatrix();
    GL11.glScaled(scale, scale, scale);
    GL11.glTranslatef(0, progress * 4, 0);
    BufferBuilder wr = Tessellator.getInstance().getBuffer();
    wr.begin(GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION);
    wr.pos(-arrowBaseWidth, -arrowLength * 0.5D, 0).endVertex();
    wr.pos(-arrowBaseWidth, -arrowLength * 0.5D + arrowBaseLength, 0).endVertex();
    wr.pos(-arrowWidth, -arrowLength * 0.5D + arrowBaseLength, 0).endVertex();
    wr.pos(0, arrowLength * 0.5D, 0).endVertex();
    wr.pos(arrowWidth, -arrowLength * 0.5D + arrowBaseLength, 0).endVertex();
    wr.pos(arrowBaseWidth, -arrowLength * 0.5D + arrowBaseLength, 0).endVertex();
    wr.pos(arrowBaseWidth, -arrowLength * 0.5D, 0).endVertex();
    Tessellator.getInstance().draw();
    GL11.glPopMatrix();
}