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WiimoteEmu: Improve simulated IR point size accuracy.

This commit is contained in:
Jordan Woyak 2022-10-09 03:28:43 -05:00
parent a056a1366f
commit 3939b32ed6
1 changed files with 15 additions and 10 deletions
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25
Source/Core/Core/HW/WiimoteEmu/Camera.cpp
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@ -75,19 +75,24 @@ CameraLogic::GetCameraPoints(const Common::Matrix44& transform, Common::Vec2 fie
const auto point = camera_view * Vec4(v, 1.0);
// Check if LED is behind camera.
if (point.z > 0)
{
// FYI: Casting down vs. rounding seems to produce more symmetrical output.
const auto x = s32((1 - point.x / point.w) * CAMERA_RES_X / 2);
const auto y = s32((1 - point.y / point.w) * CAMERA_RES_Y / 2);
if (point.z < 0)
return CameraPoint();
const auto point_size = std::lround(MAX_POINT_SIZE / point.w / 2);
// FYI: truncating vs. rounding seems to produce more symmetrical cursor positioning.
const auto x = s32((1 - point.x / point.w) * CAMERA_RES_X / 2);
const auto y = s32((1 - point.y / point.w) * CAMERA_RES_Y / 2);
if (x >= 0 && y >= 0 && x < CAMERA_RES_X && y < CAMERA_RES_Y)
return CameraPoint({u16(x), u16(y)}, u8(point_size));
}
// Check if LED is outside of view.
if (x < 0 || y < 0 || x >= CAMERA_RES_X || y >= CAMERA_RES_Y)
return CameraPoint();
return CameraPoint();
// Curve fit from data using an official WM+ and sensor bar at middle "sensitivity".
// Point sizes at minimum and maximum sensitivity differ by around 0.5 (not implemented).
const auto point_size = 2.37f * std::pow(point.z, -0.778f);
const auto clamped_point_size = std::clamp<s32>(std::lround(point_size), 1, MAX_POINT_SIZE);
return CameraPoint({u16(x), u16(y)}, u8(clamped_point_size));
});
return camera_points;