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examples: texture-light: more instances, rotate camera by default, make movement independent of frame-rate

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-04-21 04:23:09 -07:00 • committed by Stephen Gutekanst
parent e7609c76a2
commit 9ec8553cf8
1 changed files with 9 additions and 10 deletions
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19
examples/texture-light/main.zig
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@ -86,7 +86,7 @@ fn frame(app: *App, params: *FrameParams) !void {
}
// move camera
const speed = zm.f32x4s(0.2);
const speed = zm.f32x4s(@floatCast(f32, app.delta_time * 5));
const fwd = zm.normalize3(params.camera.target - params.camera.eye);
const right = zm.normalize3(zm.cross3(fwd, params.camera.up));
@ -96,16 +96,15 @@ fn frame(app: *App, params: *FrameParams) !void {
if (params.keys & FrameParams.down != 0)
params.camera.eye -= fwd * speed;
if (params.keys & FrameParams.right != 0)
params.camera.eye += right * speed;
if (params.keys & FrameParams.left != 0)
params.camera.eye -= right * speed;
if (params.keys & FrameParams.right != 0) params.camera.eye += right * speed
else if (params.keys & FrameParams.left != 0) params.camera.eye -= right * speed
else params.camera.eye += right * (speed * @Vector(4, f32){0.5, 0.5, 0.5, 0.5});
params.camera.update(params.queue);
// move light
params.light.update(params.queue);
const light_speed = @floatCast(f32, app.delta_time * 2.5);
params.light.update(params.queue, light_speed);
const back_buffer_view = app.swap_chain.?.getCurrentTextureView();
defer back_buffer_view.release();
@ -268,7 +267,7 @@ const Cube = struct {
instance: Buffer,
texture: Texture,
const IPR = 10; // instances per row
const IPR = 20; // instances per row
const SPACING = 2; // spacing between cubes
const DISPLACEMENT = vec3u(IPR * SPACING / 2, 0, IPR * SPACING / 2);
@ -745,10 +744,10 @@ const Light = struct {
};
}
fn update(self: *Self, queue: gpu.Queue) void {
fn update(self: *Self, queue: gpu.Queue, delta: f32) void {
const old = self.uniform;
const new = Light.Uniform {
.position = zm.qmul(zm.quatFromAxisAngle(vec3u(0, 1, 0), 0.05), old.position),
.position = zm.qmul(zm.quatFromAxisAngle(vec3u(0, 1, 0), delta), old.position),
.color = old.color,
};
queue.writeBuffer(self.buffer.buffer, 0, Light.Uniform, &.{new});