I am Trying to run thor::animation example that was provided with the download but i am getting a strange error. It says:
Assertion Failed: !mFrames.empty() in FrameAnimation.hpp line 115.It Seems that the frames are not being added to mFrames but I don't know how that could happen.
The part of code where I am getting this error:
void FrameAnimation::operator() (Animated& target, float progress) const
{
assert(!mFrames.empty());
assert(progress >= 0.f && progress <= 1.f);
ensureNormalized();
AURORA_FOREACH(const detail::Frame& frame, mFrames)
{
progress -= frame.duration;
if (progress < 0.f)
{
target.setTextureRect(frame.subrect);
break;
}
}
}
The code is same as in example file
#include <Thor/Animation.hpp>
#include <SFML/Graphics.hpp>
// Adds a range of frames, assuming they are aligned as rectangles in the texture.
// animation: FrameAnimation to modify
// x: Column index of the texture rectangle
// [yFirst,yLast]: Bounds for row indices (if yLast < yFirst, add frames in reverse order)
// duration: Relative duration of current frame (1 by default)
void addFrames(thor::FrameAnimation& animation, int x, int yFirst, int yLast, float duration = 1.f)
{
const int step = (yFirst < yLast) ? +1 : -1;
yLast += step; // so yLast is excluded in the range
for (int y = yFirst; y != yLast; y += step)
animation.addFrame(duration, sf::IntRect(36*x, 39*y, 36, 39));
}
int main()
{
sf::RenderWindow window(sf::VideoMode(300, 200), "Thor Animation");
window.setVerticalSyncEnabled(true);
window.setKeyRepeatEnabled(false);
sf::Font font;
if (!font.loadFromFile("../data/fonts/Primitive.ttf"))
return 1;
// Instruction text
sf::Text instructions(
"W: Play walk animation (loop)\n"
"A: Play attack animation\n"
"S: Stop current animation\n"
"Esc: Quit",
font, 12);
sf::Text animationText("", font, 12);
animationText.setPosition(100.f, 150.f);
// Load image that contains animation steps
sf::Image image;
if (!image.loadFromFile("../data/graphics/animation.png"))
return 1;
image.createMaskFromColor(sf::Color::White);
// Create texture based on sf::Image
sf::Texture texture;
if (!texture.loadFromImage(image))
return 1;
// Create sprite which is animated
sf::Sprite sprite(texture);
sprite.setPosition(100.f, 100.f);
// Define walk animation
thor::FrameAnimation walk;
addFrames(walk, 0, 0, 7); // Frames 0..7 Right leg moves forward
addFrames(walk, 0, 6, 0); // Frames 6..0 Right leg moves backward
// Define attack animation
thor::FrameAnimation attack;
addFrames(attack, 1, 0, 3); // Frames 0..3 Lift gun
addFrames(attack, 1, 4, 4, 5.f); // Frame 4 Aim (5 times normal frame duration)
for (int i = 0; i < 3; ++i)
addFrames(attack, 1, 5, 7); // Frame 5..7 Fire (repeat 3 times)
addFrames(attack, 1, 4, 4, 5.f); // Frame 4 Wait
addFrames(attack, 1, 3, 0); // Frame 3..1 Lower gun
// Define static frame for stand animation
thor::FrameAnimation stand;
addFrames(stand, 0, 0, 0);
// Register animations with their corresponding durations
thor::Animator<sf::Sprite, std::string> animator;
animator.addAnimation("walk", walk, sf::seconds(1.f));
animator.addAnimation("stand", stand, sf::seconds(1.f));
animator.addAnimation("attack", attack, sf::seconds(1.f));
// Create clock to measure frame time
sf::Clock frameClock;
// Main loop
for (;;)
{
// Handle events
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::KeyPressed)
{
switch (event.key.code)
{
case sf::Keyboard::W: animator.playAnimation("walk", true); break;
case sf::Keyboard::A: animator.playAnimation("attack"); break;
case sf::Keyboard::S: animator.stopAnimation(); break;
case sf::Keyboard::Escape: return 0;
}
}
else if (event.type == sf::Event::Closed)
{
return 0;
}
}
// If no other animation is playing, play stand animation
if (!animator.isPlayingAnimation())
animator.playAnimation("stand");
// Output playing animation (general case; at the moment an animation is always playing)
if (animator.isPlayingAnimation())
animationText.setString("Animation: " + animator.getPlayingAnimation());
else
animationText.setString("");
// Update animator and apply current animation state to the sprite
animator.update(frameClock.restart());
animator.animate(sprite);
// Draw everything
window.clear(sf::Color(50, 50, 50));
window.draw(instructions);
window.draw(animationText);
window.draw(sprite);
window.display();
}
}
