219 lines
8.4 KiB
C#
219 lines
8.4 KiB
C#
/*******************************************************************************************
|
|
*
|
|
* raylib [models] example - rlgl solar system
|
|
*
|
|
* Example complexity rating: [★★★★] 4/4
|
|
*
|
|
* NOTE: This example uses [rlgl] module functionality (pseudo-OpenGL 1.1 style coding)
|
|
*
|
|
* Example originally created with raylib 2.5, last time updated with raylib 4.0
|
|
*
|
|
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
|
|
* BSD-like license that allows static linking with closed source software
|
|
*
|
|
* Copyright (c) 2018-2025 Ramon Santamaria (@raysan5)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
using System;
|
|
using System.Numerics;
|
|
using static Raylib_cs.Raylib;
|
|
|
|
namespace Examples.Models;
|
|
|
|
public partial class SolarSystem : IExample
|
|
{
|
|
private const int screenWidth = 800;
|
|
private const int screenHeight = 450;
|
|
|
|
private const float sunRadius = 4.0f;
|
|
private const float earthRadius = 0.6f;
|
|
private const float earthOrbitRadius = 8.0f;
|
|
private const float moonRadius = 0.16f;
|
|
private const float moonOrbitRadius = 1.5f;
|
|
|
|
public string Name => "Models / Solar System";
|
|
|
|
public string Title => "raylib [models] example - rlgl solar system";
|
|
|
|
private Camera3D camera;
|
|
|
|
private float rotationSpeed;
|
|
|
|
private float earthRotation;
|
|
private float earthOrbitRotation;
|
|
private float moonRotation;
|
|
private float moonOrbitRotation;
|
|
|
|
public void Init()
|
|
{
|
|
// Define the camera to look into our 3d world
|
|
camera = new();
|
|
camera.Position = new Vector3(16.0f, 16.0f, 16.0f); // Camera position
|
|
camera.Target = new Vector3(0.0f, 0.0f, 0.0f); // Camera looking at point
|
|
camera.Up = new Vector3(0.0f, 1.0f, 0.0f); // Camera up vector (rotation towards target)
|
|
camera.FovY = 45.0f; // Camera field-of-view Y
|
|
camera.Projection = CameraProjection.Perspective; // Camera projection type
|
|
|
|
rotationSpeed = 0.2f; // General system rotation speed
|
|
|
|
earthRotation = 0.0f; // Rotation of earth around itself (days) in degrees
|
|
earthOrbitRotation = 0.0f; // Rotation of earth around the Sun (years) in degrees
|
|
moonRotation = 0.0f; // Rotation of moon around itself
|
|
moonOrbitRotation = 0.0f; // Rotation of moon around earth in degrees
|
|
}
|
|
|
|
public void Update()
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
earthRotation += (5.0f * rotationSpeed);
|
|
earthOrbitRotation += (365 / 360.0f * (5.0f * rotationSpeed) * rotationSpeed);
|
|
moonRotation += (2.0f * rotationSpeed);
|
|
moonOrbitRotation += (8.0f * rotationSpeed);
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
ClearBackground(Color.RayWhite);
|
|
|
|
BeginMode3D(camera);
|
|
|
|
Rlgl.PushMatrix();
|
|
// Scale Sun
|
|
Rlgl.Scalef(sunRadius, sunRadius, sunRadius);
|
|
// Draw the Sun
|
|
DrawSphereBasic(Color.Gold);
|
|
Rlgl.PopMatrix();
|
|
|
|
Rlgl.PushMatrix();
|
|
// Rotation for Earth orbit around Sun
|
|
Rlgl.Rotatef(earthOrbitRotation, 0.0f, 1.0f, 0.0f);
|
|
// Translation for Earth orbit
|
|
Rlgl.Translatef(earthOrbitRadius, 0.0f, 0.0f);
|
|
|
|
Rlgl.PushMatrix();
|
|
// Rotation for Earth itself
|
|
Rlgl.Rotatef(earthRotation, 0.25f, 1.0f, 0.0f);
|
|
// Scale Earth
|
|
Rlgl.Scalef(earthRadius, earthRadius, earthRadius);
|
|
|
|
// Draw the Earth
|
|
DrawSphereBasic(Color.Blue);
|
|
Rlgl.PopMatrix();
|
|
|
|
// Rotation for Moon orbit around Earth
|
|
Rlgl.Rotatef(moonOrbitRotation, 0.0f, 1.0f, 0.0f);
|
|
// Translation for Moon orbit
|
|
Rlgl.Translatef(moonOrbitRadius, 0.0f, 0.0f);
|
|
// Rotation for Moon itself
|
|
Rlgl.Rotatef(moonRotation, 0.0f, 1.0f, 0.0f);
|
|
// Scale Moon
|
|
Rlgl.Scalef(moonRadius, moonRadius, moonRadius);
|
|
|
|
// Draw the Moon
|
|
DrawSphereBasic(Color.LightGray);
|
|
Rlgl.PopMatrix();
|
|
|
|
// Some reference elements (not affected by previous matrix transformations)
|
|
DrawCircle3D(
|
|
new Vector3(0.0f, 0.0f, 0.0f),
|
|
earthOrbitRadius,
|
|
new Vector3(1, 0, 0),
|
|
90.0f,
|
|
Fade(Color.Red, 0.5f)
|
|
);
|
|
DrawGrid(20, 1.0f);
|
|
|
|
EndMode3D();
|
|
|
|
DrawText("EARTH ORBITING AROUND THE SUN!", 400, 10, 20, Color.Maroon);
|
|
DrawFPS(10, 10);
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|
|
|
|
public void Unload()
|
|
{
|
|
}
|
|
|
|
// Draw sphere without any matrix transformation
|
|
// NOTE: Sphere is drawn in world position ( 0, 0, 0 ) with radius 1.0f
|
|
private static void DrawSphereBasic(Color color)
|
|
{
|
|
var rings = 16;
|
|
var slices = 16;
|
|
|
|
Rlgl.Begin(DrawMode.Triangles);
|
|
Rlgl.Color4ub(color.R, color.G, color.B, color.A);
|
|
|
|
for (var i = 0; i < (rings + 2); i++)
|
|
{
|
|
for (var j = 0; j < slices; j++)
|
|
{
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * i)) * MathF.Sin(DEG2RAD * (j * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * i)),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * i)) * MathF.Cos(DEG2RAD * (j * 360 / slices))
|
|
);
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Sin(DEG2RAD * ((j + 1) * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Cos(DEG2RAD * ((j + 1) * 360 / slices))
|
|
);
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Sin(DEG2RAD * (j * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Cos(DEG2RAD * (j * 360 / slices))
|
|
);
|
|
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * i)) * MathF.Sin(DEG2RAD * (j * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * i)),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * i)) * MathF.Cos(DEG2RAD * (j * 360 / slices))
|
|
);
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i))) * MathF.Sin(DEG2RAD * ((j + 1) * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * (i))),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i))) * MathF.Cos(DEG2RAD * ((j + 1) * 360 / slices))
|
|
);
|
|
Rlgl.Vertex3f(
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Sin(DEG2RAD * ((j + 1) * 360 / slices)),
|
|
MathF.Sin(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))),
|
|
MathF.Cos(DEG2RAD * (270 + (180 / (rings + 1)) * (i + 1))) * MathF.Cos(DEG2RAD * ((j + 1) * 360 / slices))
|
|
);
|
|
}
|
|
}
|
|
Rlgl.End();
|
|
}
|
|
|
|
public static int Main()
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
InitWindow(screenWidth, screenHeight, "raylib [models] example - rlgl solar system");
|
|
|
|
SetTargetFPS(60);
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
var game = new SolarSystem();
|
|
game.Init();
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose()) // Detect window close button or ESC key
|
|
{
|
|
game.Update();
|
|
}
|
|
|
|
game.Unload();
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|
|
}
|