void Camera::UpdateVisibility(const Collider& Collider)
{
using std::sort;
using std::unique;
for (auto&& buf : m_Buffers) {
buf.clear();
}
const Vec2i LeftUpper = -m_CurTranslation - Vec2f(1.f, 1.f);
const Vec2i RightLower =
-m_CurTranslation + m_ViewHalfSize * 2.f + Vec2f(1.f, 1.f);
m_CollisionsEnd = Collider.CopyColliding(
LeftUpper, RightLower, m_CollisionsBuffer.begin());
sort(m_CollisionsBuffer.begin(), m_CollisionsEnd);
m_CollisionsEnd = unique(m_CollisionsBuffer.begin(), m_CollisionsEnd);
for (auto CollisionsIter = m_CollisionsBuffer.begin();
CollisionsIter != m_CollisionsEnd; ++CollisionsIter) {
const int TextureDescr = (*CollisionsIter)->GetTextureDescriptor();
if (TextureDescr != -1) {
m_Buffers[TextureDescr].push_back(*CollisionsIter);
}
}
}
void Camera::DrawBack()
{
using namespace ci;
m_Back.enableAndBind();
Rectf rect(0.f, 0.f, m_ViewHalfSize.x * 2.f, m_ViewHalfSize.y * 2.f);
glEnableClientState(GL_VERTEX_ARRAY);
GLfloat verts[8];
glVertexPointer(2, GL_FLOAT, 0, verts);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
GLfloat texCoords[8];
glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
verts[0 * 2 + 0] = rect.getX2();
verts[0 * 2 + 1] = rect.getY1();
verts[1 * 2 + 0] = rect.getX1();
verts[1 * 2 + 1] = rect.getY1();
verts[2 * 2 + 0] = rect.getX2();
verts[2 * 2 + 1] = rect.getY2();
verts[3 * 2 + 0] = rect.getX1();
verts[3 * 2 + 1] = rect.getY2();
const Vec2f LeftUpper = -m_CurTranslation - Vec2f(1.f, 1.f);
const Vec2f RightLower =
-m_CurTranslation + m_ViewHalfSize * 2.f + Vec2f(1.f, 1.f);
const Vec2f TextureSize = m_Back.getSize();
const float x1 = LeftUpper.x / TextureSize.x;
const float x2 = RightLower.x / TextureSize.x;
const float y1 = LeftUpper.y / TextureSize.y;
const float y2 = RightLower.y / TextureSize.y;
texCoords[0 * 2 + 0] = x2;
texCoords[0 * 2 + 1] = y1;
texCoords[1 * 2 + 0] = x1;
texCoords[1 * 2 + 1] = y1;
texCoords[2 * 2 + 0] = x2;
texCoords[2 * 2 + 1] = y2;
texCoords[3 * 2 + 0] = x1;
texCoords[3 * 2 + 1] = y2;
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
void Particles::
update_from_grid(void)
{
int p;
int i, ui, j, vj;
float fx, ufx, fy, vfy;
for(p=0; p<np; ++p){
grid.bary_x(x[p][0], ui, ufx);
grid.bary_x_centre(x[p][0], i, fx);
grid.bary_y(x[p][1], vj, vfy);
grid.bary_y_centre(x[p][1], j, fy);
//u[p]+=Vec2f(grid.du.bilerp(ui, j, ufx, fy), grid.dv.bilerp(i, vj, fx, vfy)); // FLIP
u[p]=Vec2f(grid.u.bilerp(ui, j, ufx, fy), grid.v.bilerp(i, vj, fx, vfy)); // PIC
}
}
Texture TextureFromAsset(const string& Id)
{
using ci::loadImage;
using ci::app::loadAsset;
return loadImage(loadAsset(Id));
}
Vec2i Camera::GetSize() const { return Vec2i(m_HorizBounds.y, m_VertBounds.y); }
ci::Rectf ToRect(const AABB Box)
{
using ci::Rectf;
return Rectf(Box.m_Center - Box.m_HalfSize, Box.m_Center + Box.m_HalfSize);
}
