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scale the camera to keep the banana in view #2

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scale the camera to keep the banana in view #2

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15 changes: 13 additions & 2 deletions src/game.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -512,8 +512,19 @@ fn drawGameplay(self: Game) void {

nvg.save();
defer nvg.restore();
const s = self.width / world_width;
nvg.translate(0, self.height - s * world_height);
var s = self.width / world_width;

// the y location where the camera starts scaling to follow the banana
const banana_threshold_y: f32 = 100;
var translate_x: f32 = 0;
if (self.banana_flying and self.banana_y < banana_threshold_y) {
const past_threshold = banana_threshold_y - self.banana_y;
const scale_ratio = 1 + (past_threshold / world_height);
s = s / scale_ratio;
translate_x = (self.width - s * world_width) / 2;
}

nvg.translate(translate_x, self.height - s * world_height);
nvg.scale(s, s);
const screenshake = @sin(self.screenshake_frequency * @intToFloat(f32, self.frame)) * self.screenshake_amplitude;
nvg.translate(screenshake, 0);
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