void SpriteBatch::addSprite(float x, float y, float width, float height, float u1, float v1, float u2, float v2, const Vector4& color, SpriteBatch::SpriteVertex* vertices)
{
GP_ASSERT(vertices);
const float x2 = x + width;
const float y2 = y + height;
SPRITE_ADD_VERTEX(vertices[0], x, y, 0, u1, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[1], x, y2, 0, u1, v2, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[2], x2, y, 0, u2, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[3], x2, y2, 0, u2, v2, color.x, color.y, color.z, color.w);
}
void SpriteBatch::addSprite(float x, float y, float width, float height, float u1, float v1, float u2, float v2, const Vector4& color, const Rectangle& clip, SpriteBatch::SpriteVertex* vertices)
{
GP_ASSERT(vertices);
// Only add a sprite if at least part of the sprite is within the clip region.
if (clipSprite(clip, x, y, width, height, u1, v1, u2, v2))
{
const float x2 = x + width;
const float y2 = y + height;
SPRITE_ADD_VERTEX(vertices[0], x, y, 0, u1, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[1], x, y2, 0, u1, v2, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[2], x2, y, 0, u2, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(vertices[3], x2, y2, 0, u2, v2, color.x, color.y, color.z, color.w);
}
}
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);
}
void SpriteBatch::draw(float x, float y, float z, float width, float height, float u1, float v1, float u2, float v2, const Vector4& color, 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;
}
// Write sprite vertex data.
const float x2 = x + width;
const float y2 = y + height;
static SpriteVertex v[4];
SPRITE_ADD_VERTEX(v[0], x, y, z, u1, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[1], x, y2, z, u1, v2, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[2], x2, y, z, u2, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[3], x2, y2, 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(const Vector3& position, const Vector3& right, const Vector3& forward, float width, float height,
float u1, float v1, float u2, float v2, const Vector4& color, const Vector2& rotationPoint, float rotationAngle)
{
// Calculate the vertex positions.
Vector3 tRight(right);
tRight *= width * 0.5f;
Vector3 tForward(forward);
tForward *= height * 0.5f;
Vector3 p0 = position;
p0 -= tRight;
p0 -= tForward;
Vector3 p1 = position;
p1 += tRight;
p1 -= tForward;
tForward = forward;
tForward *= height;
Vector3 p2 = p0;
p2 += tForward;
Vector3 p3 = p1;
p3 += tForward;
// Calculate the rotation point.
Vector3 rp = p0;
tRight = right;
tRight *= width * rotationPoint.x;
tForward *= rotationPoint.y;
rp += tRight;
rp += tForward;
// Rotate all points the specified amount about the given point (about the up vector).
static Vector3 u;
Vector3::cross(right, forward, &u);
static Matrix rotation;
Matrix::createRotation(u, rotationAngle, &rotation);
p0 -= rp;
p0 *= rotation;
p0 += rp;
p1 -= rp;
p1 *= rotation;
p1 += rp;
p2 -= rp;
p2 *= rotation;
p2 += rp;
p3 -= rp;
p3 *= rotation;
p3 += rp;
// Add the sprite vertex data to the batch.
static SpriteVertex v[4];
SPRITE_ADD_VERTEX(v[0], p0.x, p0.y, p0.z, u1, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[1], p1.x, p1.y, p1.z, u2, v1, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[2], p2.x, p2.y, p2.z, u1, v2, color.x, color.y, color.z, color.w);
SPRITE_ADD_VERTEX(v[3], p3.x, p3.y, p3.z, u2, v2, color.x, color.y, color.z, color.w);
static const unsigned short indices[4] = { 0, 1, 2, 3 };
_batch->add(v, 4, const_cast<unsigned short*>(indices), 4);
}
