void MOUSE::CalculateMappos(TERRAIN &terrain)
{
//Get Mouse Ray
D3DXMATRIX world;
D3DXMatrixIdentity(&world);
m_pDevice->SetTransform(D3DTS_WORLD, &world);
RAY mRay = GetRay();
float minDistance = 10000.0f;
for(int i=0;i<(int)terrain.m_patches.size();i++)
{
if(mRay.Intersect(terrain.m_patches[i]->m_BBox) > 0.0f)
{
// Collect only the closest intersection
BOOL hit;
DWORD dwFace;
float hitU, hitV, dist;
D3DXIntersect(terrain.m_patches[i]->m_pMesh, &mRay.org, &mRay.dir, &hit, &dwFace, &hitU, &hitV, &dist, NULL, NULL);
if(hit && dist < minDistance)
{
minDistance = dist;
int tiles = dwFace / 2; //Two faces to each map tile
int tilesPerRow = terrain.m_patches[i]->m_mapRect.right - terrain.m_patches[i]->m_mapRect.left;
int y = tiles / tilesPerRow, x = tiles - y * tilesPerRow;
if(dwFace % 2 == 0) //Hit upper left face
{
if(hitU > 0.5f)x++;
else if(hitV > 0.5f)y++;
}
else //Hit lower right face
{
if(hitU + hitV < 0.5f)y++;
else if(hitU > 0.5f)x++;
else {x++;y++;}
}
m_mappos.Set(terrain.m_patches[i]->m_mapRect.left + x, terrain.m_patches[i]->m_mapRect.top + y);
m_ballPos = terrain.GetWorldPos(m_mappos);
}
}
}
}
HRESULT APPLICATION::Render()
{
// Clear the viewport
m_pDevice->Clear(0L, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0x00000000, 1.0f, 0L );
// Begin the scene
if(SUCCEEDED(m_pDevice->BeginScene()))
{
for(int i=0;i<(int)m_objects.size();i++)
m_objects[i].Render();
//Find intersecting object closest to the camera
D3DXMATRIX identity;
D3DXMatrixIdentity(&identity);
int object = -1;
float bestDist = 100000.0f;
for(int i=0;i<(int)m_objects.size() - 1;i++)
{
float dist = -1.0f;
//Do intersection tests
if(m_intersectType == 0)
{
m_pDevice->SetTransform(D3DTS_WORLD, &m_objects[i].m_meshInstance.GetWorldMatrix());
RAY ray = m_mouse.GetRay();
dist = ray.Intersect(m_objects[i].m_meshInstance);
}
else if(m_intersectType == 1)
{
m_pDevice->SetTransform(D3DTS_WORLD, &identity);
RAY ray = m_mouse.GetRay();
dist = ray.Intersect(m_objects[i].m_BBox);
}
else if(m_intersectType == 2)
{
m_pDevice->SetTransform(D3DTS_WORLD, &identity);
RAY ray = m_mouse.GetRay();
dist = ray.Intersect(m_objects[i].m_BSphere);
}
m_objects[i].RenderBoundingVolume(m_intersectType);
if(dist >= 0.0f && dist < bestDist)
{
object = i;
bestDist = dist;
}
}
//Write m_mouse text
if(object != -1)
{
RECT mr[] = {{m_mouse.x + 2, m_mouse.y + 24, 0, 0}, {m_mouse.x, m_mouse.y + 22, 0, 0}};
m_pFontMouse->DrawText(NULL, m_objects[object].m_name.c_str(), -1, &mr[0], DT_LEFT| DT_TOP | DT_NOCLIP, 0xff000000);
m_pFontMouse->DrawText(NULL, m_objects[object].m_name.c_str(), -1, &mr[1], DT_LEFT| DT_TOP | DT_NOCLIP, 0xffff0000);
}
RECT r[] = {{10, 10, 0, 0}, {10, 30, 0, 0}, {10, 50, 0, 0}};
m_pFont->DrawText(NULL, "Mouse Wheel: Change Camera Radius", -1, &r[0], DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
m_pFont->DrawText(NULL, "Arrows: Change Camera Angle", -1, &r[1], DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
m_pFont->DrawText(NULL, "Space: Change Bounding Volume", -1, &r[2], DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
RECT rc = {500, 10, 0, 0};
if(m_intersectType == 0)
m_pFont->DrawText(NULL, "Mesh Intersection Test", -1, &rc, DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
else if(m_intersectType == 1)
m_pFont->DrawText(NULL, "Box Intersection Test", -1, &rc, DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
else if(m_intersectType == 2)
m_pFont->DrawText(NULL, "Sphere Intersection Test", -1, &rc, DT_LEFT| DT_TOP | DT_NOCLIP, 0xffffffff);
//Draw m_mouse
m_mouse.Paint();
// End the scene.
m_pDevice->EndScene();
m_pDevice->Present(0, 0, 0, 0);
}
return S_OK;
}