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example/interaction: chores++

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Hermet Park 2025-01-22 13:22:24 +09:00
parent fdd760a34f
commit 97f85d44cb
2 changed files with 12 additions and 4 deletions
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5
examples/Example.h
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@ -71,6 +71,11 @@ struct Example
virtual void populate(const char* path) {} virtual void populate(const char* path) {}
virtual ~Example() {} virtual ~Example() {}
float timestamp()
{
return float(SDL_GetTicks()) * 0.001f;
}
void scandir(const char* path) void scandir(const char* path)
{ {
char buf[PATH_MAX]; char buf[PATH_MAX];

11
examples/Interaction.cpp
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@ -29,6 +29,7 @@
struct UserExample : tvgexam::Example struct UserExample : tvgexam::Example
{ {
unique_ptr<tvg::Animation> animation; unique_ptr<tvg::Animation> animation;
float begin = 0.0f;
bool hitting(const tvg::Paint* paint, int32_t x, int32_t y, float segment1, float segment2) bool hitting(const tvg::Paint* paint, int32_t x, int32_t y, float segment1, float segment2)
{ {
@ -36,7 +37,8 @@ struct UserExample : tvgexam::Example
tvgexam::verify(paint->bounds(&px, &py, &pw, &ph, true)); tvgexam::verify(paint->bounds(&px, &py, &pw, &ph, true));
if (x >= px && x <= px + pw && y >= py && y <= py + ph) { if (x >= px && x <= px + pw && y >= py && y <= py + ph) {
tvgexam::verify(animation->segment(segment1, segment2)); tvgexam::verify(animation->segment(segment1, segment2));
elapsed = 0.0f; elapsed = 0;
begin = timestamp();
return true; return true;
} }
return false; return false;
@ -122,12 +124,13 @@ struct UserExample : tvgexam::Example
{ {
if (!canvas) return false; if (!canvas) return false;
auto progress = tvgexam::progress(elapsed, animation->duration()); auto progress = (timestamp() - begin) / animation->duration();
//Default is a stopped motion //Default is a stopped motion
if (progress > 0.95f) { if (progress > 1.0f) {
animation->segment(0.0f, 0.0f); animation->segment(0.0f, 0.0f);
elapsed = progress = 0.0f; this->elapsed = 0;
progress = 0.0f;
} }
//Update animation frame only when it's changed //Update animation frame only when it's changed