private void OnCollisionEnter(Collision collision)
{
if (collision.gameObject.layer == 8) // collider layer
{
Debug.Log("Hit Raycast Layer!");
var contacts = collision.contacts;
Vector3 pos = contacts[0].point;
Vector3 nrm = contacts[0].normal;
// we need to fire a ray from contact point into mesh to allow
// for material reaction
Ray r = new Ray(pos + (nrm * 0.01f), -nrm);
APARaycastHit hit;
MaterialStruct mat;
if (MaterialRayCastSystem.RayVsSceneMaterial(r, out hit, out mat))
{
// Depending on material it should maybe shatter?
if (mat.m_breakOnImpact == 1)
{
// Spawn sounds yey
{
GameObject soundSpawn = new GameObject();
soundSpawn.transform.position = transform.position;
var ac = soundSpawn.AddComponent <AudioSource>();
int randIndex = Random.Range(0, m_brokenSoundFX.Count);
ac.clip = m_brokenSoundFX[randIndex];
ac.Play();
}
// Trigger Game Reaction
Vector3 hitWsPosition = hit.point;
Vector3 hitWsNormal = hit.transform.TransformVector(hit.normal);
// Shatter
var particle = Instantiate(m_explosionParticle) as GameObject;
particle.transform.SetPositionAndRotation(hitWsPosition, Quaternion.LookRotation(hitWsNormal, Vector3.up));
m_gameController.GameReaction(hitWsPosition, hitWsNormal, mat);
Destroy(gameObject);
}
}
}
}
private void MeshPreProcessInteractionRoutine()
{
Ray r = m_meshRenderCamera.ScreenPointToRay(Input.mousePosition);
APARaycastHit hit;
MaterialStruct mat;
if (MaterialRayCastSystem.RayVsSceneMaterial(r, out hit, out mat))
{
Vector3 hitWsPosition = hit.point;
Vector3 hitWsNormal = hit.transform.TransformVector(hit.normal);
GameReaction(hitWsPosition, hitWsNormal, mat);
}
else
{
m_uiMaterialColourOutput.color = m_errorColour;
m_uiMaterialTextOutput.text = "No Data / Ray Missed ";
}
}
// Has to be OnPostRender so we can grab render targets safely
private void OnPostRender()
{
if (m_lastWidth != Screen.width || m_lastHeight != Screen.height)
{
OnResize();
}
if (m_rayCastTriggered)
{
m_rayCastTriggered = false;
var zDepth = m_textureOverlay.depthXYZZed;
// Store current RT
RenderTexture currentRT = RenderTexture.active;
// Create new render target to copy
{
RenderTexture.active = m_zedRT;
Graphics.Blit(zDepth, m_zedRT);
Texture2D zedReadable = new Texture2D(zDepth.width, zDepth.height, zDepth.format, false);
zedReadable.ReadPixels(new Rect(0, 0, m_zedRT.width, m_zedRT.height), 0, 0);
zedReadable.Apply();
Vector2 relMousePos = new Vector2();
relMousePos.x = m_mousePositionWhenTriggered.x / Screen.width;
relMousePos.y = m_mousePositionWhenTriggered.y / Screen.height;
Vector2 dPixUv = relMousePos;
dPixUv.y = 1.0f - dPixUv.y;
dPixUv.x *= zedReadable.width;
dPixUv.y *= zedReadable.height;
// this only works for starting camera position and rotation
var depthPixelData = zedReadable.GetPixel((int)dPixUv.x, (int)dPixUv.y);
var matPixelData = new Color(0, 0, 0, 0);
MaterialStruct matFound = null;
if (m_materialColourTexture != null)
{
Vector2 mPixUv = relMousePos;
mPixUv.y = 1.0f - mPixUv.y;
mPixUv.x *= m_materialColourTexture.width;
mPixUv.y *= m_materialColourTexture.height;
matPixelData = m_materialColourTexture.GetPixel((int)mPixUv.x, (int)mPixUv.y);
matFound = MaterialRayCastSystem.FindMaterialStructFromColour(matPixelData);
}
// Need to guard against uninit areas of pixels
// This can happen if camera hasn't been able to do depth properly in area
if (
float.IsNaN(depthPixelData.r) ||
float.IsInfinity(depthPixelData.r) ||
float.IsNaN(depthPixelData.g) ||
float.IsInfinity(depthPixelData.g) ||
float.IsNaN(depthPixelData.b) ||
float.IsInfinity(depthPixelData.b)
)
{
return;
}
// If changed process of getting this position, then remember to udpate for loop at bottom
Vector3 cVsPos = new Vector3(depthPixelData.r, depthPixelData.g, -depthPixelData.b);
// get back into object space
Matrix4x4 inverseView = m_zedCamera.worldToCameraMatrix.inverse;
Vector3 cWsPos = inverseView * new Vector4(cVsPos.x, cVsPos.y, cVsPos.z, 1.0f);
// Now we need to find the normal....
{
// https://stackoverflow.com/questions/37627254/how-to-reconstruct-normal-from-depth-without-artifacts-on-edge
// [ ]
// [ ] [x] [ ]
// [ ]
// 4 samples around edge
// find the closest sample top and bottom, left and right relative to center sample
// then normalise cross product on it? (x dir, y dir)
Vector2[] offsets = new Vector2[4]
{
new Vector2(0, 15),
new Vector2(0, -15),
new Vector2(15, 0),
new Vector2(-15, 0)
};
Vector3[] wsPositions = new Vector3[4];
float[] distToCenter = new float[4];
for (int i = 0; i < 4; i++)
{
Vector2 uvOffset = dPixUv + offsets[i];
Color sample = zedReadable.GetPixel((int)uvOffset.x, (int)uvOffset.y);
Vector4 vsPos = new Vector4(sample.r, sample.g, -sample.b, 1.0f);
// Calculate WS POS
Vector3 sampleWsPos = inverseView * vsPos;
distToCenter[i] = Vector3.Distance(cWsPos, sampleWsPos);
wsPositions[i] = sampleWsPos;
}
int verticalSampleIndex = 0;
int horizontalSampleIndex = 2;
// Find closest vertical sample
if (distToCenter[0] > distToCenter[1])
{
verticalSampleIndex = 1;
}
// Find closest horizontal sample
if (distToCenter[2] > distToCenter[3])
{
horizontalSampleIndex = 3;
}
Vector3 normalGen = Vector3.Cross(wsPositions[verticalSampleIndex] - cWsPos, wsPositions[horizontalSampleIndex] - cWsPos);
normalGen.Normalize();
// Update Game Reaction
m_gameController.GameReaction(cWsPos, normalGen, matFound);
}
}
// Restore original active render texture
RenderTexture.active = currentRT;
}
}