[examples] Use logarithmic scaling for 2d examples with zoom functionality #3977
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You can also implement something similar with powf, like here: This way you also get natural feeling increments. This solution seems more straightforward to me, but maybe the expf solution has some advantages that I fail to see. |
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@rmn20 Personally I prefer this solution, it seems more simple to me. Also, I prefer to apply it to only one of the examples ( |
Basically, the EDIT: Actually, we can avoid float scaleFactor = 1.0f + (0.25f * fabsf(wheel));
if (wheel < 0) scaleFactor = 1.0f / scaleFactor;
camera.zoom = Clamp(camera.zoom * scaleFactor, 0.125, 64); |
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If it's just the one example that this change is being applied to, I'd also like to propose using a click-and-drag motion instead of the mouse wheel: @@ -48,9 +48,8 @@ int main ()
camera.target = Vector2Add(camera.target, delta);
}
- // Zoom based on mouse wheel
- float wheel = GetMouseWheelMove();
- if (wheel != 0)
+ // Zoom based on mouse left click
+ if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
{
// Get the world point that is under the mouse
Vector2 mouseWorldPos = GetScreenToWorld2D(GetMousePosition(), camera);
@@ -61,10 +60,13 @@ int main ()
// Set the target to match, so that the camera maps the world space point
// under the cursor to the screen space point under the cursor at any zoom
camera.target = mouseWorldPos;
-
+ }
+ if (IsMouseButtonDown(MOUSE_BUTTON_LEFT))
+ {
// Zoom increment
- float scaleFactor = 1.0f + (0.25f * fabsf(wheel));
- if (wheel < 0) scaleFactor = 1.0f / scaleFactor;
+ float deltaX = GetMouseDelta().x;
+ float scaleFactor = 1.0f + (0.01f * fabsf(deltaX));
+ if (deltaX < 0) scaleFactor = 1.0f / scaleFactor;
camera.zoom = Clamp(camera.zoom * scaleFactor, 0.125, 64);
} |
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@myQwil Actually examples are intended for users to learn so we can add several approaches to show users the different possibilities. I'm merging this PR and adding the proposed alternative. |
Makes zoom increments feel more natural. Otherwise, increments can feel too small when zoomed in, or too big when zoomed out.