Begin basic HUDElement system

Need to allow moving and such by specifying a clickable area

Will probably have the element override getClickableArea() and return a default. We'll then set that to new values after being moved.

src/main/java/WayofTime/bloodmagic/client/hud/HUDElement.java

@@ -0,0 +1,58 @@
+package WayofTime.bloodmagic.client.hud;
+
+import WayofTime.bloodmagic.util.handler.event.ClientHandler;
+import lombok.Getter;
+import lombok.Setter;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.ScaledResolution;
+import net.minecraft.client.renderer.Tessellator;
+import net.minecraft.client.renderer.VertexBuffer;
+import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
+import net.minecraftforge.client.event.RenderGameOverlayEvent;
+
+@Getter
+@Setter
+public abstract class HUDElement {
+
+    private int xOffset;
+    private int yOffset;
+    private final int xOffsetDefault;
+    private final int yOffsetDefault;
+    private final RenderGameOverlayEvent.ElementType elementType;
+
+    public HUDElement(int xOffset, int yOffset, RenderGameOverlayEvent.ElementType elementType) {
+        this.xOffset = xOffset;
+        this.xOffsetDefault = xOffset;
+        this.yOffset = yOffset;
+        this.yOffsetDefault = yOffset;
+        this.elementType = elementType;
+
+        ClientHandler.hudElements.add(this);
+    }
+
+    public abstract void render(Minecraft minecraft, ScaledResolution resolution, float partialTicks);
+
+    public abstract boolean shouldRender(Minecraft minecraft);
+
+    public void onPositionChanged() {
+
+    }
+
+    public void resetToDefault() {
+        this.xOffset = xOffsetDefault;
+        this.yOffset = yOffsetDefault;
+    }
+
+    public void drawTexturedModalRect(int x, int y, int textureX, int textureY, int width, int height) {
+        float f = 0.00390625F;
+        float f1 = 0.00390625F;
+        Tessellator tessellator = Tessellator.getInstance();
+        VertexBuffer vertexbuffer = tessellator.getBuffer();
+        vertexbuffer.begin(7, DefaultVertexFormats.POSITION_TEX);
+        vertexbuffer.pos((double)(x + 0), (double)(y + height), 0).tex((double)((float)(textureX + 0) * f), (double)((float)(textureY + height) * f1)).endVertex();
+        vertexbuffer.pos((double)(x + width), (double)(y + height), 0).tex((double)((float)(textureX + width) * f), (double)((float)(textureY + height) * f1)).endVertex();
+        vertexbuffer.pos((double)(x + width), (double)(y + 0), 0).tex((double)((float)(textureX + width) * f), (double)((float)(textureY + 0) * f1)).endVertex();
+        vertexbuffer.pos((double)(x + 0), (double)(y + 0), 0).tex((double)((float)(textureX + 0) * f), (double)((float)(textureY + 0) * f1)).endVertex();
+        tessellator.draw();
+    }
+}