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BIG CHANGE: REDESIGNED: Vr device simulator #1582

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Vr simulator has been moved to core module and completely redesigned. Now user is in charge of stereo-render fbo and also in full control of distortion shader. Code is a bit more complex but better aligned with other raylib examples.
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Ray 2021-03-20 18:36:25 +01:00
parent 4fba09794f
commit a76fcaba3e
5 changed files with 300 additions and 403 deletions
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90
examples/core/core_vr_simulator.c
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@ -2,10 +2,10 @@
*
* raylib [core] example - VR Simulator (Oculus Rift CV1 parameters)
*
* This example has been created using raylib 1.7 (www.raylib.com)
* This example has been created using raylib 3.6-dev (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2017 Ramon Santamaria (@raysan5)
* Copyright (c) 2017-2021 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
@ -25,40 +25,55 @@ int main(void)
const int screenHeight = 450;
// NOTE: screenWidth/screenHeight should match VR device aspect ratio
SetConfigFlags(FLAG_MSAA_4X_HINT);
InitWindow(screenWidth, screenHeight, "raylib [core] example - vr simulator");
// VR device parameters definition
VrDeviceInfo device = {
// Oculus Rift CV1 parameters for simulator
.hResolution = 2160, // Horizontal resolution in pixels
.vResolution = 1200, // Vertical resolution in pixels
.hScreenSize = 0.133793f, // Horizontal size in meters
.vScreenSize = 0.0669f, // Vertical size in meters
.vScreenCenter = 0.04678f, // Screen center in meters
.eyeToScreenDistance = 0.041f, // Distance between eye and display in meters
.lensSeparationDistance = 0.07f, // Lens separation distance in meters
.interpupillaryDistance = 0.07f, // IPD (distance between pupils) in meters
// 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
.lensDistortionValues[0] = 1.0f, // Lens distortion constant parameter 0
.lensDistortionValues[1] = 0.22f, // Lens distortion constant parameter 1
.lensDistortionValues[2] = 0.24f, // Lens distortion constant parameter 2
.lensDistortionValues[3] = 0.0f, // Lens distortion constant parameter 3
.chromaAbCorrection[0] = 0.996f, // Chromatic aberration correction parameter 0
.chromaAbCorrection[1] = -0.004f, // Chromatic aberration correction parameter 1
.chromaAbCorrection[2] = 1.014f, // Chromatic aberration correction parameter 2
.chromaAbCorrection[3] = 0.0f, // Chromatic aberration correction parameter 3
};
// Init VR simulator (Oculus Rift CV1 parameters)
InitVrSimulator();
VrDeviceInfo hmd = { 0 }; // VR device parameters (head-mounted-device)
// Oculus Rift CV1 parameters for simulator
hmd.hResolution = 2160; // HMD horizontal resolution in pixels
hmd.vResolution = 1200; // HMD vertical resolution in pixels
hmd.hScreenSize = 0.133793f; // HMD horizontal size in meters
hmd.vScreenSize = 0.0669f; // HMD vertical size in meters
hmd.vScreenCenter = 0.04678f; // HMD screen center in meters
hmd.eyeToScreenDistance = 0.041f; // HMD distance between eye and display in meters
hmd.lensSeparationDistance = 0.07f; // HMD lens separation distance in meters
hmd.interpupillaryDistance = 0.07f; // HMD IPD (distance between pupils) in meters
// 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.
hmd.lensDistortionValues[0] = 1.0f; // HMD lens distortion constant parameter 0
hmd.lensDistortionValues[1] = 0.22f; // HMD lens distortion constant parameter 1
hmd.lensDistortionValues[2] = 0.24f; // HMD lens distortion constant parameter 2
hmd.lensDistortionValues[3] = 0.0f; // HMD lens distortion constant parameter 3
hmd.chromaAbCorrection[0] = 0.996f; // HMD chromatic aberration correction parameter 0
hmd.chromaAbCorrection[1] = -0.004f; // HMD chromatic aberration correction parameter 1
hmd.chromaAbCorrection[2] = 1.014f; // HMD chromatic aberration correction parameter 2
hmd.chromaAbCorrection[3] = 0.0f; // HMD chromatic aberration correction parameter 3
InitVrSimulator(device);
// Get Vr stereo config parameters for device parameters
VrStereoConfig config = GetVrConfig(device);
// Distortion shader (uses device lens distortion and chroma)
Shader distortion = LoadShader(0, TextFormat("resources/distortion%i.fs", GLSL_VERSION));
// Update distortion shader with lens and distortion-scale parameters
SetShaderValue(distortion, GetShaderLocation(distortion, "leftLensCenter"), config.leftLensCenter, SHADER_UNIFORM_VEC2);
SetShaderValue(distortion, GetShaderLocation(distortion, "rightLensCenter"), config.rightLensCenter, SHADER_UNIFORM_VEC2);
SetShaderValue(distortion, GetShaderLocation(distortion, "leftScreenCenter"), config.leftScreenCenter, SHADER_UNIFORM_VEC2);
SetShaderValue(distortion, GetShaderLocation(distortion, "rightScreenCenter"), config.rightScreenCenter, SHADER_UNIFORM_VEC2);
SetVrConfiguration(hmd, distortion); // Set Vr device parameters for stereo rendering
SetShaderValue(distortion, GetShaderLocation(distortion, "scale"), config.scale, SHADER_UNIFORM_VEC2);
SetShaderValue(distortion, GetShaderLocation(distortion, "scaleIn"), config.scaleIn, SHADER_UNIFORM_VEC2);
SetShaderValue(distortion, GetShaderLocation(distortion, "deviceWarpParam"), device.lensDistortionValues, SHADER_UNIFORM_VEC4);
SetShaderValue(distortion, GetShaderLocation(distortion, "chromaAbParam"), device.chromaAbCorrection, 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
Camera camera = { 0 };
@ -81,8 +96,6 @@ int main(void)
// Update
//----------------------------------------------------------------------------------
UpdateCamera(&camera); // Update camera (simulator mode)
if (IsKeyPressed(KEY_SPACE)) ToggleVrMode(); // Toggle VR mode
//----------------------------------------------------------------------------------
// Draw
@ -91,8 +104,7 @@ int main(void)
ClearBackground(RAYWHITE);
BeginVrDrawing();
BeginVrDrawing(target);
BeginMode3D(camera);
DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
@ -101,8 +113,11 @@ int main(void)
DrawGrid(40, 1.0f);
EndMode3D();
EndVrDrawing();
BeginShaderMode(distortion);
DrawTextureRec(target.texture, (Rectangle){ 0, 0, target.texture.width, -target.texture.height }, (Vector2){ 0.0f, 0.0f }, WHITE);
EndShaderMode();
DrawFPS(10, 10);
@ -112,11 +127,12 @@ int main(void)
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(distortion); // Unload distortion shader
UnloadRenderTexture(target); // Unload stereo render fbo
UnloadShader(distortion); // Unload distortion shader
CloseVrSimulator(); // Close VR simulator
CloseVrSimulator(); // Close VR simulator
CloseWindow(); // Close window and OpenGL context
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;