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using System;

using System.Numerics;

using R3D_cs;

using Raylib_cs;

using static Raylib_cs.Raylib;

namespace Examples;

public static class Decal

{

public static int Main()

{

// Initialize window

InitWindow(800, 450, "[r3d] - Decal example");

SetTargetFPS(60);

// Initialize R3D

R3D.Init(GetScreenWidth(), GetScreenHeight());

// Create meshes

var plane = R3D.GenMeshPlane(5.0f, 5.0f, 1, 1);

var sphere = R3D.GenMeshSphere(0.5f, 64, 64);

var cylinder = R3D.GenMeshCylinder(0.5f, 0.5f, 1, 64);

var material = R3D.GetDefaultMaterial();

material.Albedo.Color = Color.Gray;

// Create decal

var decal = R3D.DECAL_BASE;

R3D.SetTextureFilter(TextureFilter.Bilinear);

decal.Albedo = R3D.LoadAlbedoMap("resources/images/decal.png", Color.White);

decal.Normal = R3D.LoadNormalMap("resources/images/decal_normal.png", 1.0f);

decal.NormalThreshold = 45.0f;

decal.FadeWidth = 20.0f;

// Create data for instanced drawing

var instances = R3D.LoadInstanceBuffer(3, InstanceFlags.Position);

var positions = R3D.MapInstances<Vector3>(instances, InstanceFlags.Position);

positions[0] = new Vector3(-1.25f, 0, 1);

positions[1] = new Vector3(0, 0, 1);

positions[2] = new Vector3(1.25f, 0, 1);

R3D.UnmapInstances(instances, InstanceFlags.Position);

// Setup environment

R3D.SetEnvironmentEx((ref env) => env.Ambient.Color = new Color(10, 10, 10, 255));

// Create light

var light = R3D.CreateLight(LightType.Dir);

R3D.SetLightDirection(light, new Vector3(0.5f, -1, -0.5f));

R3D.SetShadowDepthBias(light, 0.005f);

R3D.EnableShadow(light);

R3D.SetLightActive(light, true);

// Setup camera

var camera = new Camera3D

{

Position = new Vector3(0, 3, 3),

Target = new Vector3(0, 0, 0),

Up = new Vector3(0, 1, 0),

FovY = 60

};

// Capture mouse

DisableCursor();

// Main loop

while (!WindowShouldClose())

{

UpdateCamera(ref camera, CameraMode.Free);

BeginDrawing();

ClearBackground(Color.RayWhite);

R3D.Begin(camera);

R3D.DrawMesh(plane, material, Vector3.Zero, 1.0f);

R3D.DrawMesh(sphere, material, new Vector3(-1, 0.5f, -1), 1.0f);

R3D.DrawMeshEx(cylinder, material, new Vector3(1, 0.5f, -1), Quaternion.CreateFromYawPitchRoll(0, 0, MathF.PI/2), Vector3.One);

R3D.DrawDecal(decal, new Vector3(-1, 1, -1), 1.0f);

R3D.DrawDecalEx(decal, new Vector3(1, 0.5f, -0.5f), Quaternion.CreateFromYawPitchRoll(0, MathF.PI/2, 0), new Vector3(1.25f, 1.25f, 1.25f));

R3D.DrawDecalInstanced(decal, instances, 3);

R3D.End();

EndDrawing();

}

// Cleanup

R3D.UnloadMesh(plane);

R3D.UnloadMesh(sphere);

R3D.UnloadMesh(cylinder);

R3D.UnloadMaterial(material);

R3D.UnloadDecalMaps(decal);

R3D.Close();

CloseWindow();

return 0;

}

}