/*
 * Decompiled with CFR 0.152.
 * 
 * Could not load the following classes:
 *  org.joml.Matrix4f
 *  org.joml.Vector3f
 */
package net.minecraft.client.renderer.feature;

import com.mojang.blaze3d.vertex.VertexConsumer;
import net.minecraft.client.renderer.MultiBufferSource;
import net.minecraft.client.renderer.SubmitNodeCollection;
import net.minecraft.client.renderer.SubmitNodeStorage;
import net.minecraft.client.renderer.entity.state.EntityRenderState;
import net.minecraft.client.renderer.rendertype.RenderType;
import net.minecraft.client.renderer.rendertype.RenderTypes;
import net.minecraft.client.renderer.texture.OverlayTexture;
import net.minecraft.resources.Identifier;
import net.minecraft.util.ARGB;
import net.minecraft.world.phys.AABB;
import org.joml.Matrix4f;
import org.joml.Vector3f;

public class ShadowFeatureRenderer {
    private static final RenderType SHADOW_RENDER_TYPE = RenderTypes.entityShadow(Identifier.withDefaultNamespace("textures/misc/shadow.png"));

    public void render(SubmitNodeCollection nodeCollection, MultiBufferSource.BufferSource bufferSource) {
        VertexConsumer buffer = bufferSource.getBuffer(SHADOW_RENDER_TYPE);
        for (SubmitNodeStorage.ShadowSubmit submit : nodeCollection.getShadowSubmits()) {
            for (EntityRenderState.ShadowPiece piece : submit.pieces()) {
                AABB aabb = piece.shapeBelow().bounds();
                float x01 = piece.relativeX() + (float)aabb.minX;
                float x11 = piece.relativeX() + (float)aabb.maxX;
                float y01 = piece.relativeY() + (float)aabb.minY;
                float z01 = piece.relativeZ() + (float)aabb.minZ;
                float z11 = piece.relativeZ() + (float)aabb.maxZ;
                float radius = submit.radius();
                float u0 = -x01 / 2.0f / radius + 0.5f;
                float u1 = -x11 / 2.0f / radius + 0.5f;
                float v0 = -z01 / 2.0f / radius + 0.5f;
                float v1 = -z11 / 2.0f / radius + 0.5f;
                int color = ARGB.white(piece.alpha());
                ShadowFeatureRenderer.shadowVertex(submit.pose(), buffer, color, x01, y01, z01, u0, v0);
                ShadowFeatureRenderer.shadowVertex(submit.pose(), buffer, color, x01, y01, z11, u0, v1);
                ShadowFeatureRenderer.shadowVertex(submit.pose(), buffer, color, x11, y01, z11, u1, v1);
                ShadowFeatureRenderer.shadowVertex(submit.pose(), buffer, color, x11, y01, z01, u1, v0);
            }
        }
    }

    private static void shadowVertex(Matrix4f pose, VertexConsumer buffer, int color, float x, float y, float z, float u, float v) {
        Vector3f position = pose.transformPosition(x, y, z, new Vector3f());
        buffer.addVertex(position.x(), position.y(), position.z(), color, u, v, OverlayTexture.NO_OVERLAY, 0xF000F0, 0.0f, 1.0f, 0.0f);
    }
}