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Update/merge examples back into main repo (#192)

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Chris Dill
2023-08-25 08:08:32 +01:00
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Examples/Core/VrSimulator.cs Normal file
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/*******************************************************************************************
*
* raylib [core] example - VR Simulator (Oculus Rift CV1 parameters)
*
* This example has been created using raylib 1.7 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2017 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
using System;
using System.Numerics;
using static Raylib_cs.Raylib;
namespace Examples.Core;
public class VrSimulator
{
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 1080;
const int screenHeight = 600;
SetConfigFlags(ConfigFlags.FLAG_MSAA_4X_HINT);
InitWindow(screenWidth, screenHeight, "raylib [core] example - vr simulator");
// VR device parameters definition
VrDeviceInfo device = new VrDeviceInfo
{
// Oculus Rift CV1 parameters for simulator
HResolution = 2160,
VResolution = 1200,
HScreenSize = 0.133793f,
VScreenSize = 0.0669f,
VScreenCenter = 0.04678f,
EyeToScreenDistance = 0.041f,
LensSeparationDistance = 0.07f,
InterpupillaryDistance = 0.07f,
};
// NOTE: CV1 uses a Fresnel-hybrid-asymmetric lenses with specific distortion compute shaders.
// Following parameters are an approximation to distortion stereo rendering but results differ from actual
// device.
unsafe
{
device.LensDistortionValues[0] = 1.0f;
device.LensDistortionValues[1] = 0.22f;
device.LensDistortionValues[2] = 0.24f;
device.LensDistortionValues[3] = 0.0f;
device.ChromaAbCorrection[0] = 0.996f;
device.ChromaAbCorrection[1] = -0.004f;
device.ChromaAbCorrection[2] = 1.014f;
device.ChromaAbCorrection[3] = 0.0f;
}
// Load VR stereo config for VR device parameteres (Oculus Rift CV1 parameters)
VrStereoConfig config = LoadVrStereoConfig(device);
// Distortion shader (uses device lens distortion and chroma)
Shader distortion = LoadShader(null, "resources/distortion330.fs");
// Update distortion shader with lens and distortion-scale parameters
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "leftLensCenter"),
config.LeftLensCenter,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "rightLensCenter"),
config.RightLensCenter,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "leftScreenCenter"),
config.LeftScreenCenter,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "rightScreenCenter"),
config.RightScreenCenter,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "scale"),
config.Scale,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
Raylib.SetShaderValue(
distortion,
GetShaderLocation(distortion, "scaleIn"),
config.ScaleIn,
ShaderUniformDataType.SHADER_UNIFORM_VEC2
);
unsafe
{
SetShaderValue(
distortion,
GetShaderLocation(distortion, "deviceWarpParam"),
device.LensDistortionValues,
ShaderUniformDataType.SHADER_UNIFORM_VEC4
);
SetShaderValue(
distortion,
GetShaderLocation(distortion, "chromaAbParam"),
device.ChromaAbCorrection,
ShaderUniformDataType.SHADER_UNIFORM_VEC4
);
}
// Initialize framebuffer for stereo rendering
// NOTE: Screen size should match HMD aspect ratio
RenderTexture2D target = LoadRenderTexture(GetScreenWidth(), GetScreenHeight());
// Define the camera to look into our 3d world
Camera3D camera;
camera.Position = new Vector3(5.0f, 2.0f, 5.0f);
camera.Target = new Vector3(0.0f, 2.0f, 0.0f);
camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
camera.FovY = 60.0f;
camera.Projection = CameraProjection.CAMERA_PERSPECTIVE;
Vector3 cubePosition = new(0.0f, 0.0f, 0.0f);
SetTargetFPS(90); // Set our game to run at 90 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose())
{
// Update
//----------------------------------------------------------------------------------
UpdateCamera(ref camera, CameraMode.CAMERA_FIRST_PERSON);
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RAYWHITE);
BeginTextureMode(target);
ClearBackground(Color.RAYWHITE);
BeginVrStereoMode(config);
BeginMode3D(camera);
DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, Color.RED);
DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, Color.MAROON);
DrawGrid(40, 1.0f);
EndMode3D();
EndVrStereoMode();
EndTextureMode();
BeginShaderMode(distortion);
DrawTextureRec(
target.Texture,
new Rectangle(0, 0, (float)target.Texture.Width, (float)-target.Texture.Height),
new Vector2(0.0f, 0.0f),
Color.WHITE
);
EndShaderMode();
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadVrStereoConfig(config);
UnloadRenderTexture(target);
UnloadShader(distortion);
CloseWindow();
//--------------------------------------------------------------------------------------
return 0;
}
}