void SpriteBatch::draw(const Vector3& dst, float width, float height, float u1, float v1, float u2, float v2, const Vector4& color,
const Vector2& rotationPoint, float rotationAngle)
{
// Expand dst by scale into 4 points.
float x2 = dst.x + width;
float y2 = dst.y + height;
Vector2 upLeft(dst.x, dst.y);
Vector2 upRight(x2, dst.y);
Vector2 downLeft(dst.x, y2);
Vector2 downRight(x2, y2);
// Rotate points around rotationAxis by rotationAngle.
Vector2 pivotPoint(rotationPoint);
pivotPoint.x *= width;
pivotPoint.y *= height;
pivotPoint.x += dst.x;
pivotPoint.y += dst.y;
upLeft.rotate(pivotPoint, rotationAngle);
upRight.rotate(pivotPoint, rotationAngle);
downLeft.rotate(pivotPoint, rotationAngle);
downRight.rotate(pivotPoint, rotationAngle);
// Write sprite vertex data.
static SpriteVertex v[4];
ADD_SPRITE_VERTEX(v[0], upLeft.x, upLeft.y, dst.z, u1, v1, color.x, color.y, color.z, color.w);
ADD_SPRITE_VERTEX(v[1], upRight.x, upRight.y, dst.z, u1, v2, color.x, color.y, color.z, color.w);
ADD_SPRITE_VERTEX(v[2], downLeft.x, downLeft.y, dst.z, u2, v1, color.x, color.y, color.z, color.w);
ADD_SPRITE_VERTEX(v[3], downRight.x, downRight.y, dst.z, u2, v2, color.x, color.y, color.z, color.w);
static unsigned short indices[4] = { 0, 1, 2, 3 };
_batch->add(v, 4, indices, 4);
}
void SpriteBatch::draw(float x, float y, float z, float width, float height, float u1, float v1, float u2, float v2, const Vector4& color,
const Vector2& rotationPoint, float rotationAngle, bool positionIsCenter)
{
// Treat the given position as the center if the user specified it as such.
if (positionIsCenter)
{
x -= 0.5f * width;
y -= 0.5f * height;
}
// Expand the destination position by scale into 4 points.
float x2 = x + width;
float y2 = y + height;
Vector2 upLeft(x, y);
Vector2 upRight(x2, y);
Vector2 downLeft(x, y2);
Vector2 downRight(x2, y2);
// Rotate points around rotationAxis by rotationAngle.
if (rotationAngle != 0)
{
Vector2 pivotPoint(rotationPoint);
pivotPoint.x *= width;
pivotPoint.y *= height;
pivotPoint.x += x;
pivotPoint.y += y;
upLeft.rotate(pivotPoint, rotationAngle);
upRight.rotate(pivotPoint, rotationAngle);
downLeft.rotate(pivotPoint, rotationAngle);
downRight.rotate(pivotPoint, rotationAngle);
}
// Write sprite vertex data.
static SpriteVertex v[4];
SPRITE_ADD_VERTEX(v[0], downLeft.x, downLeft.y, z, u1, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[1], upLeft.x, upLeft.y, z, u1, v2, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[2], downRight.x, downRight.y, z, u2, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[3], upRight.x, upRight.y, z, u2, v2, color.x, color.y, color.z, color.w);
static unsigned short indices[4] = { 0, 1, 2, 3 };
_batch->add(v, 4, indices, 4);
}
