Did someone say ASM Rewrite???!!!

3 files changed, 238 insertions, 0 deletions

diff --git a/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/EntityRendererTransformer.java b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/EntityRendererTransformer.java
new file mode 100644
index 0000000..dadb1e0
--- /dev/null
+++ b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/EntityRendererTransformer.java
@@ -0,0 +1,110 @@
+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 (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);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public 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;
+    }
+
+    public InsnList insertMouseHook() {
+        InsnList list = new InsnList();
+
+        list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, "mouseHook", "(Lnet/minecraft/client/Minecraft;)Z", false));
+
+        return list;
+    }
+}
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/MinecraftTransformer.java b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/MinecraftTransformer.java
new file mode 100644
index 0000000..2a98619
--- /dev/null
+++ b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/MinecraftTransformer.java
@@ -0,0 +1,56 @@
+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.Minecraft
+ */
+public class MinecraftTransformer implements ITransformer {
+
+    private static final String HOOK_CLASS = "me/djtheredstoner/perspectivemod/asm/hooks/MinecraftHook";
+
+    @Override
+    public String[] getClassName() {
+        return new String[]{"net.minecraft.client.Minecraft"};
+    }
+
+    @Override
+    public void transform(ClassNode classNode, String name) {
+        for (MethodNode method : classNode.methods) {
+            String methodName = mapMethodName(classNode, method);
+
+            if (methodName.equals("runTick") || methodName.equals("func_71407_l")) {
+                Iterator<AbstractInsnNode> iterator = method.instructions.iterator();
+
+                while (iterator.hasNext()) {
+                    AbstractInsnNode next = iterator.next();
+
+                    if (next.getOpcode() == PUTFIELD) {
+                        FieldInsnNode insn = (FieldInsnNode) next;
+
+                        String ownerName = mapClassName(insn.owner);
+                        String fieldName = mapFieldNameFromNode(insn);
+
+                        if (ownerName.equals("net/minecraft/client/settings/GameSettings") && (fieldName.equals("thirdPersonView") || fieldName.equals("field_74320_O")) && insn.desc.equals("I")) {
+                            method.instructions.insertBefore(insn, insertThirdPersonHook());
+                            method.instructions.remove(insn);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public InsnList insertThirdPersonHook() {
+        InsnList list = new InsnList();
+
+        list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, "thirdPersonHook", "(Lnet/minecraft/client/settings/GameSettings;I)V", false));
+
+        return list;
+    }
+}
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/RenderManagerTransformer.java b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/RenderManagerTransformer.java
new file mode 100644
index 0000000..fee214a
--- /dev/null
+++ b/src/main/java/me/djtheredstoner/perspectivemod/asm/transformers/RenderManagerTransformer.java
@@ -0,0 +1,72 @@
+package me.djtheredstoner.perspectivemod.asm.transformers;
+
+import me.djtheredstoner.perspectivemod.asm.ITransformer;
+import net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper;
+import org.objectweb.asm.tree.*;
+
+import java.util.Iterator;
+
+import static org.objectweb.asm.Opcodes.*;
+
+/**
+ * @see net.minecraft.client.renderer.entity.RenderManager
+ */
+public class RenderManagerTransformer implements ITransformer {
+    private static final String HOOK_CLASS = "me/djtheredstoner/perspectivemod/asm/hooks/RenderManagerHook";
+
+    @Override
+    public String[] getClassName() {
+        return new String[]{"net.minecraft.client.renderer.entity.RenderManager"};
+    }
+
+    @Override
+    public void transform(ClassNode classNode, String name) {
+        for (MethodNode method : classNode.methods) {
+            String methodName = mapMethodName(classNode, method);
+
+            if (methodName.equals("cacheActiveRenderInfo") || methodName.equals("func_180597_a")) {
+                Iterator<AbstractInsnNode> iterator = method.instructions.iterator();
+
+                while (iterator.hasNext()) {
+                    AbstractInsnNode next = iterator.next();
+
+                    if (next.getOpcode() == PUTFIELD) {
+                        FieldInsnNode insn = (FieldInsnNode)next;
+
+                        String ownerName = mapClassName(insn.owner);
+                        String fieldName = mapFieldNameFromNode(insn);
+
+                        if (ownerName.equals("net/minecraft/client/renderer/entity/RenderManager") && insn.desc.equals("F")) {
+
+                            InsnList insnList = null;
+
+                            switch (fieldName) {
+                                case "playerViewX":
+                                case "field_78732_j":
+                                    insnList = insertRotationHook("playerViewX");
+                                    break;
+                                case "playerViewY":
+                                case "field_78735_i":
+                                    insnList = insertRotationHook("playerViewY");
+                                    break;
+                            }
+
+                            if(insnList != null) {
+                                method.instructions.insertBefore(insn, insnList);
+                                method.instructions.remove(insn);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public InsnList insertRotationHook(String field) {
+        InsnList list = new InsnList();
+
+        list.add(new MethodInsnNode(INVOKESTATIC, HOOK_CLASS, field + "Hook", "(Lnet/minecraft/client/renderer/entity/RenderManager;F)V", false));
+
+        return list;
+    }
+}