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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 // 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 fwd = zm.normalize3(params.camera.target - params.camera.eye);
const right = zm.normalize3(zm.cross3(fwd, params.camera.up)); 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) if (params.keys & FrameParams.down != 0)
params.camera.eye -= fwd * speed; params.camera.eye -= fwd * speed;
if (params.keys & FrameParams.right != 0) if (params.keys & FrameParams.right != 0) params.camera.eye += right * speed
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});
if (params.keys & FrameParams.left != 0)
params.camera.eye -= right * speed;
params.camera.update(params.queue); params.camera.update(params.queue);
// move light // 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(); const back_buffer_view = app.swap_chain.?.getCurrentTextureView();
defer back_buffer_view.release(); defer back_buffer_view.release();
@ -268,7 +267,7 @@ const Cube = struct {
instance: Buffer, instance: Buffer,
texture: Texture, texture: Texture,
const IPR = 10; // instances per row const IPR = 20; // instances per row
const SPACING = 2; // spacing between cubes const SPACING = 2; // spacing between cubes
const DISPLACEMENT = vec3u(IPR * SPACING / 2, 0, IPR * SPACING / 2); 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 old = self.uniform;
const new = Light.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, .color = old.color,
}; };
queue.writeBuffer(self.buffer.buffer, 0, Light.Uniform, &.{new}); queue.writeBuffer(self.buffer.buffer, 0, Light.Uniform, &.{new});