From d47a806c64e8d1711ad448af169f98463feb1c4d Mon Sep 17 00:00:00 2001 From: William Moberg Date: Mon, 29 Feb 2016 15:49:23 +0100 Subject: [PATCH] Made a easy hack to solve jittering when standing still. Jittering should still be present when moving, but at least it is less prominent when moving. --- src/Engine/Collision/CollisionSystem.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/Engine/Collision/CollisionSystem.cpp b/src/Engine/Collision/CollisionSystem.cpp index 9689bf13..95609ea6 100644 --- a/src/Engine/Collision/CollisionSystem.cpp +++ b/src/Engine/Collision/CollisionSystem.cpp @@ -12,6 +12,7 @@ void CollisionSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& c if (!boundingBox) { return; } + ComponentWrapper& cTransform = entity["Transform"]; EntityAABB& boxA = *boundingBox; bool everHitTheGround = false; @@ -86,10 +87,12 @@ void CollisionSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& c glm::mat4 modelMatrix = Transform::ModelMatrix(boxB.Entity); glm::vec3 inOutVelocity = (glm::vec3)cPhysics["Velocity"]; + bool notMovingxz = glm::all(glm::lessThan(glm::abs(glm::vec2(inOutVelocity.x, inOutVelocity.z)), glm::vec2(0.01f))) && prevPosIt != m_PrevPositions.end(); bool isOnGround = (bool)cPhysics["IsOnGround"]; float verticalStepHeight = (float)(double)cPhysics["VerticalStepHeight"]; if (Collision::AABBvsTriangles(boxA, model->Vertices(), model->m_Indices, modelMatrix, inOutVelocity, verticalStepHeight, isOnGround, resolutionVector)) { - (glm::vec3&)cTransform["Position"] += resolutionVector; + //Move the position to previous position if it is not moving in the xz-plane, else resolve with the resolution vector. + (glm::vec3&)cTransform["Position"] += notMovingxz ? prevPosIt->second - boxA.Origin() : resolutionVector; boxA = *Collision::EntityAbsoluteAABB(entity); cPhysics["Velocity"] = inOutVelocity; if (isOnGround) {