From 8f91ed81c58fd5cdbeda4db5478649bd677712da Mon Sep 17 00:00:00 2001 From: raysan5 Date: Tue, 31 May 2016 20:08:36 +0200 Subject: Updated Oculus sample to Oculus SDK 1.4 Still working on the sample but almost finished. Some rlgl internals redesign required and it will be ready! --- examples/oculus_glfw_sample/raymath.h | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'examples/oculus_glfw_sample/raymath.h') diff --git a/examples/oculus_glfw_sample/raymath.h b/examples/oculus_glfw_sample/raymath.h index 52e92b50..2e055e9f 100644 --- a/examples/oculus_glfw_sample/raymath.h +++ b/examples/oculus_glfw_sample/raymath.h @@ -73,7 +73,7 @@ //---------------------------------------------------------------------------------- #if defined(RAYMATH_STANDALONE) - // Vector2 type + // Vector2 type typedef struct Vector2 { float x; float y; @@ -158,6 +158,7 @@ RMDEF void PrintMatrix(Matrix m); // Print matrix ut //------------------------------------------------------------------------------------ RMDEF float QuaternionLength(Quaternion quat); // Compute the length of a quaternion RMDEF void QuaternionNormalize(Quaternion *q); // Normalize provided quaternion +RMDEF void QuaternionInvert(Quaternion *quat); // Invert provided quaternion RMDEF Quaternion QuaternionMultiply(Quaternion q1, Quaternion q2); // Calculate two quaternion multiplication RMDEF Quaternion QuaternionSlerp(Quaternion q1, Quaternion q2, float slerp); // Calculates spherical linear interpolation between two quaternions RMDEF Quaternion QuaternionFromMatrix(Matrix matrix); // Returns a quaternion for a given rotation matrix @@ -908,6 +909,23 @@ RMDEF void QuaternionNormalize(Quaternion *q) q->w *= ilength; } +// Invert provided quaternion +RMDEF void QuaternionInvert(Quaternion *quat) +{ + float length = QuaternionLength(*quat); + float lengthSq = length*length; + + if (lengthSq != 0.0) + { + float i = 1.0f/lengthSq; + + quat->x *= -i; + quat->y *= -i; + quat->z *= -i; + quat->w *= i; + } +} + // Calculate two quaternion multiplication RMDEF Quaternion QuaternionMultiply(Quaternion q1, Quaternion q2) { -- cgit v1.2.3