C3D_Mtx* Sprite::getMatrix() {
if (dirtyMatrix) {
dirtyMatrix = false;
Mtx_Identity(&modelview);
Mtx_Scale(&modelview, scaleX, scaleY, 1.f);
Mtx_Translate(&modelview, posX, posY, 0);
}
return &modelview;
}
void Mtx_Translate(C3D_Mtx* mtx, float x, float y, float z)
{
C3D_Mtx tm, om;
Mtx_Identity(&tm);
tm.r[0].w = x;
tm.r[1].w = y;
tm.r[2].w = z;
Mtx_Multiply(&om, mtx, &tm);
Mtx_Copy(mtx, &om);
}
Sprite::Sprite()
: dirtyPixels(true)
, dirtyMatrix(true)
, actualWidth(0)
, actualHeight(0)
, posX(0)
, posY(0)
, scaleX(1.f)
, scaleY(1.f)
{
Mtx_Identity(&modelview);
vertices = (vertex *)linearAlloc(sizeof(vertex) * 4);
}
void Mtx_Ortho(C3D_Mtx* mtx, float left, float right, float top, float bottom, float near, float far) {
C3D_Mtx mp;
Mtx_Zeros(&mp);
// Build standard orthogonal projection matrix
mp.r[0].x = 2.0f / (right - left);
mp.r[0].w = (left + right) / (left - right);
mp.r[1].y = 2.0f / (top - bottom);
mp.r[1].w = (bottom + top) / (bottom - top);
mp.r[2].z = 2.0f / (far - near);
mp.r[2].w = (near + far) / (near - far);
mp.r[3].w = 1.0f;
// Fix depth range to [-1, 0]
C3D_Mtx mp2;
Mtx_Identity(&mp2);
mp2.r[2].z = 0.5;
mp2.r[2].w = -0.5;
Mtx_Multiply(mtx, &mp2, &mp);
}
void OSystem_3DS::updateFocus() {
if (_focusClearTime && getMillis() - _focusClearTime > 5000) {
_focusClearTime = 0;
_focusDirty = true;
_focusRect = Common::Rect(_gameWidth, _gameHeight);
}
if (_focusDirty) {
float duration = 1.f / 20.f; // Focus animation in frame duration
float w = 400.f;
float h = 240.f;
float ratio = _focusRect.width() / _focusRect.height();
if (ratio > w/h) {
_focusTargetScaleX = w / _focusRect.width();
float newHeight = (float)_focusRect.width() / w/h;
_focusTargetScaleY = h / newHeight;
_focusTargetPosX = _focusTargetScaleX * _focusRect.left;
_focusTargetPosY = _focusTargetScaleY * ((float)_focusRect.top - (newHeight - _focusRect.height())/2.f);
} else {
_focusTargetScaleY = h / _focusRect.height();
float newWidth = (float)_focusRect.height() * w/h;
_focusTargetScaleX = w / newWidth;
_focusTargetPosY = _focusTargetScaleY * _focusRect.top;
_focusTargetPosX = _focusTargetScaleX * ((float)_focusRect.left - (newWidth - _focusRect.width())/2.f);
}
if (_focusTargetPosX < 0 && _focusTargetScaleY != 240.f / _gameHeight)
_focusTargetPosX = 0;
if (_focusTargetPosY < 0 && _focusTargetScaleX != 400.f / _gameWidth)
_focusTargetPosY = 0;
_focusStepPosX = duration * (_focusTargetPosX - _focusPosX);
_focusStepPosY = duration * (_focusTargetPosY - _focusPosY);
_focusStepScaleX = duration * (_focusTargetScaleX - _focusScaleX);
_focusStepScaleY = duration * (_focusTargetScaleY - _focusScaleY);
}
if (_focusDirty || _focusPosX != _focusTargetPosX || _focusPosY != _focusTargetPosY ||
_focusScaleX != _focusTargetScaleX || _focusScaleY != _focusTargetScaleY) {
_focusDirty = false;
if ((_focusStepPosX > 0 && _focusPosX > _focusTargetPosX) || (_focusStepPosX < 0 && _focusPosX < _focusTargetPosX))
_focusPosX = _focusTargetPosX;
else if (_focusPosX != _focusTargetPosX)
_focusPosX += _focusStepPosX;
if ((_focusStepPosY > 0 && _focusPosY > _focusTargetPosY) || (_focusStepPosY < 0 && _focusPosY < _focusTargetPosY))
_focusPosY = _focusTargetPosY;
else if (_focusPosY != _focusTargetPosY)
_focusPosY += _focusStepPosY;
if ((_focusStepScaleX > 0 && _focusScaleX > _focusTargetScaleX) || (_focusStepScaleX < 0 && _focusScaleX < _focusTargetScaleX))
_focusScaleX = _focusTargetScaleX;
else if (_focusScaleX != _focusTargetScaleX)
_focusScaleX += _focusStepScaleX;
if ((_focusStepScaleY > 0 && _focusScaleY > _focusTargetScaleY) || (_focusStepScaleY < 0 && _focusScaleY < _focusTargetScaleY))
_focusScaleY = _focusTargetScaleY;
else if (_focusScaleY != _focusTargetScaleY)
_focusScaleY += _focusStepScaleY;
Mtx_Identity(&_focusMatrix);
Mtx_Translate(&_focusMatrix, -_focusPosX, -_focusPosY, 0);
Mtx_Scale(&_focusMatrix, _focusScaleX, _focusScaleY, 1.f);
}
}
