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package me.djtheredstoner.perspectivemod.asm.transformers;
import me.djtheredstoner.perspectivemod.asm.ITransformer;
import org.objectweb.asm.tree.*;
import java.util.Iterator;
import static org.objectweb.asm.Opcodes.*;
/**
* @see net.minecraft.client.renderer.EntityRenderer
*/
public class EntityRendererTransformer implements ITransformer {
private static final String HOOK_CLASS = "me/djtheredstoner/perspectivemod/asm/hooks/EntityRendererHook";
@Override
public String[] getClassName() {
return new String[]{"net.minecraft.client.renderer.EntityRenderer"};
}
@Override
public void transform(ClassNode classNode, String name) {
for (MethodNode method : classNode.methods) {
String methodName = mapMethodName(classNode, method);
if (methodName.equals("orientCamera") || methodName.equals("func_78467_g")) {
Iterator<AbstractInsnNode> iterator = method.instructions.iterator();
while (iterator.hasNext()) {
AbstractInsnNode next = iterator.next();
if(next.getOpcode() == GETFIELD) {
FieldInsnNode insn = (FieldInsnNode)next;
String ownerName = mapClassName(insn.owner);
String fieldName = mapFieldNameFromNode(insn);
if(ownerName.equals("net/minecraft/entity/Entity" ) && insn.desc.equals("F")) {
InsnList insnList = null;
switch (fieldName) {
case "rotationYaw":
case "field_70177_z":
insnList = insertRotationHook("rotationYaw");
break;
case "prevRotationYaw":
case "field_70126_B":
insnList = insertRotationHook("prevRotationYaw");
break;
case "rotationPitch":
case "field_70125_A":
insnList = insertRotationHook("rotationPitch");
break;
case "prevRotationPitch":
case "field_70127_C":
insnList = insertRotationHook("prevRotationPitch");
break;
}
if(insnList != null) {
method.instructions.insertBefore(insn, insnList);
method.instructions.remove(insn);
}
}
} /*else if (next.getOpcode() == DLOAD) {
VarInsnNode insn = (VarInsnNode) next;
if(insn.getPrevious().getOpcode() == FCONST_0 && insn.getNext().getOpcode() == DNEG) {
method.instructions.insert(insn, insertDistanceHook());
}
}*/
}
} else if (methodName.equals("updateCameraAndRender") || methodName.equals("func_181560_a")) {
Iterator<AbstractInsnNode> iterator = method.instructions.iterator();
while (iterator.hasNext()) {
AbstractInsnNode next = iterator.next();
if(next.getOpcode() == GETFIELD) {
FieldInsnNode insn = (FieldInsnNode)next;
String ownerName = mapClassName(insn.owner);
String fieldName = mapFieldNameFromNode(insn);
if(ownerName.equals("net/minecraft/client/Minecraft") && (fieldName.equals("inGameHasFocus") || fieldName.equals("field_71415_G")) && insn.desc.equals("Z")
&& insn.getNext().getNext().getNext().getOpcode() == IFEQ) {
method.instructions.insertBefore(insn, insertMouseHook());
method.instructions.remove(insn);
}
}
}
}
//Poggers Ultra FPS Praseodymium mode.
/* else if (methodName.equals("renderWorldPass") || methodName.equals("func_175068_a")) {
method.instructions.insert(method.instructions.getFirst(), new InsnNode(RETURN));
}*/
}
}
private InsnList insertRotationHook(String field) {
InsnList list = new InsnList();
list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, field + "Hook", "(Lnet/minecraft/entity/Entity;)F", false));
return list;
}
private InsnList insertMouseHook() {
InsnList list = new InsnList();
list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, "mouseHook", "(Lnet/minecraft/client/Minecraft;)Z", false));
return list;
}
private InsnList insertDistanceHook() {
InsnList list = new InsnList();
list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, "distanceHook", "(D)D", false));
return list;
}
}
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