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package makamys.lodmod.mixin;
import java.util.ArrayList;
import java.util.List;
import org.lwjgl.opengl.GL11;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.Redirect;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
import makamys.lodmod.LODMod;
import makamys.lodmod.ducks.IWorldRenderer;
import makamys.lodmod.renderer.ChunkMesh;
import makamys.lodmod.renderer.FarChunkCache;
import makamys.lodmod.renderer.FarWorldRenderer;
import makamys.lodmod.renderer.LODRenderer;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.WorldRenderer;
import net.minecraft.client.renderer.entity.RenderItem;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.world.ChunkCache;
import net.minecraft.world.World;
@Mixin(WorldRenderer.class)
abstract class MixinWorldRenderer implements IWorldRenderer {
@Shadow
public int posX;
@Shadow
public int posY;
@Shadow
public int posZ;
@Shadow
private boolean isInFrustum;
@Shadow
public boolean[] skipRenderPass;
@Shadow
private int glRenderList;
@Shadow
public boolean needsUpdate;
boolean savedDrawnStatus;
public List<ChunkMesh> chunkMeshes;
@Redirect(method = "setPosition", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/renderer/entity/RenderItem;renderAABB(Lnet/minecraft/util/AxisAlignedBB;)V"))
private void redirectRenderAABB(AxisAlignedBB p1) {
if(!FarWorldRenderer.class.isInstance(this.getClass())) {
RenderItem.renderAABB(p1);
}
}
@Redirect(method = "updateRenderer", at = @At(value = "NEW", target = "Lnet/minecraft/world/ChunkCache;"))
private ChunkCache redirectConstructChunkCache(World p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8) {
if(!FarWorldRenderer.class.isInstance(this.getClass())) {
return new ChunkCache(p1, p2, p3, p4, p5, p6, p7, p8);
} else {
return new FarChunkCache(p1, p2, p3, p4, p5, p6, p7, p8);
}
}
@Inject(method = "updateRenderer", at = @At(value = "HEAD"))
private void preUpdateRenderer(CallbackInfo ci) {
saveDrawnStatus();
if(LODMod.isActive()) {
if(needsUpdate) {
if(chunkMeshes != null) {
chunkMeshes.clear();
} else {
chunkMeshes = new ArrayList<>();
}
} else {
chunkMeshes = null;
}
}
}
@Inject(method = "updateRenderer", at = @At(value = "RETURN"))
private void postUpdateRenderer(CallbackInfo ci) {
notifyIfDrawnStatusChanged();
if(LODMod.isActive()) {
if(chunkMeshes != null) {
LODMod.renderer.onWorldRendererPost(WorldRenderer.class.cast(this));
chunkMeshes.clear();
}
}
}
@Inject(method = "postRenderBlocks", at = @At(value = "HEAD"))
private void prePostRenderBlocks(int pass, EntityLivingBase entity, CallbackInfo ci) {
if(LODMod.isActive() && !LODMod.disableChunkMeshes) {
if(chunkMeshes != null) {
chunkMeshes.add(ChunkMesh.fromTessellator(pass, WorldRenderer.class.cast(this), Tessellator.instance));
}
}
}
@Redirect(method = "postRenderBlocks", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/renderer/Tessellator;draw()I"))
private int redirectPostRenderBlocksDraw() {
if(!FarWorldRenderer.class.isInstance(this.getClass())) {
return Tessellator.instance.draw();
} else {
Tessellator.instance.reset();
return 0;
}
}
// There's probably a nicer way to do this
@Redirect(method = "postRenderBlocks", at = @At(value = "INVOKE", target = "Lorg/lwjgl/opengl/GL11;glPopMatrix()V"))
private void redirectPostRenderBlocksGL1() {
if(!FarWorldRenderer.class.isInstance(this.getClass())) {
GL11.glPopMatrix();
}
}
@Redirect(method = "postRenderBlocks", at = @At(value = "INVOKE", target = "Lorg/lwjgl/opengl/GL11;glEndList()V"))
private void redirectPostRenderBlocksGL2() {
if(!FarWorldRenderer.class.isInstance(this.getClass())) {
GL11.glEndList();
}
}
// XXX this is inconsistent, Forge callbacks are preserved in postRenderBlocks but not preRenderBlocks
@Inject(method = "preRenderBlocks", at = @At(value = "HEAD"))
private void preRenderBlocksInjector(CallbackInfo ci) {
if(FarWorldRenderer.class.isInstance(this.getClass())) {
Tessellator.instance.setTranslation((double)(-this.posX), (double)(-this.posY), (double)(-this.posZ));
ci.cancel();
}
}
@Inject(method = "setDontDraw", at = @At(value = "HEAD"))
private void preSetDontDraw(CallbackInfo ci) {
if(LODMod.isActive()) {
LODMod.renderer.onWorldRendererChanged(WorldRenderer.class.cast(this), LODRenderer.WorldRendererChange.DELETED);
}
}
@Override
public List<ChunkMesh> getChunkMeshes() {
return chunkMeshes;
}
@Inject(method = "updateInFrustum", at = @At(value = "HEAD"))
private void preUpdateInFrustum(CallbackInfo ci) {
saveDrawnStatus();
}
@Inject(method = "updateInFrustum", at = @At(value = "RETURN"))
private void postUpdateInFrustum(CallbackInfo ci) {
notifyIfDrawnStatusChanged();
}
private void saveDrawnStatus() {
savedDrawnStatus = isDrawn();
}
private void notifyIfDrawnStatusChanged() {
boolean drawn = isDrawn();
if(LODMod.isActive() && drawn != savedDrawnStatus) {
LODMod.renderer.onWorldRendererChanged(WorldRenderer.class.cast(this), drawn ? LODRenderer.WorldRendererChange.VISIBLE : LODRenderer.WorldRendererChange.INVISIBLE);
}
}
private boolean isDrawn() {
return isInFrustum && (!skipRenderPass[0] || !skipRenderPass[1]);
}
}
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