C++ SineWave函数代码示例

	void Render(double time)
	{
		static const Mat4f reflection(
			Vec4f( 1.0, 0.0, 0.0, 0.0),
			Vec4f( 0.0,-1.0, 0.0, 0.0),
			Vec4f( 0.0, 0.0, 1.0, 0.0),
			Vec4f( 0.0, 0.0, 0.0, 1.0)
		);

		auto camera = CamMatrixf::Orbiting(
			Vec3f(),
			GLfloat(7.0 + SineWave(time / 12.0)*2.5),
			FullCircles(time / 10.0),
			Degrees(45.0 - SineWave(time / 7.0)*35.0)
		);

		shape_prog.Use();
		shape.Bind();

		gl.Enable(Capability::CullFace);
		gl.FrontFace(make_shape.FaceWinding());

		// render into the off-screen framebuffer
		fbo.Bind(Framebuffer::Target::Draw);
		gl.Viewport(
			(width - refl_tex_side) / 2,
			(height - refl_tex_side) / 2,
			refl_tex_side, refl_tex_side
		);
		gl.Clear().ColorBuffer().DepthBuffer();

		shape_camera_matrix.Set(
			camera *
			ModelMatrixf::Translation(0.0f, -1.0f, 0.0f) *
			reflection
		);

		gl.CullFace(Face::Front);
		shape_instr.Draw(shape_indices);

		gl.Bind(Framebuffer::Target::Draw, DefaultFramebuffer());
		gl.Viewport(width, height);
		gl.Clear().ColorBuffer().DepthBuffer();

		shape_camera_matrix.Set(camera);

		gl.CullFace(Face::Back);
		shape_instr.Draw(shape_indices);

		gl.Disable(Capability::CullFace);

		// Render the plane
		plane_prog.Use();
		plane.Bind();

		plane_camera_matrix.Set(camera);
		plane_camera_position.Set(camera.Position());

		plane_instr.Draw(plane_indices);
	}

//--------------------------------------------------------------
void testApp::setup(){

    ofSoundStreamSetup(2, 0, this, 44100, 256, 4);
    
    // create a new oscillator which we'll use for the actual audio signal
    SineWave tone = SineWave();
    
    // create a sine wave we'll use for some vibrato
    SineWave vibratoOsc = SineWave();
    vibratoOsc.freq(1);
    
    // you can use the regular arithmatic operators on Generators and their subclasses (SineWave extends Generator)
    float basePitch = 400;
    Generator frequency = basePitch + (vibratoOsc * basePitch * 0.01);
    
    // plug that frequency generator into the frequency slot of the main audio-producing sine wave
    tone.freq(frequency);
    
    ControlGenerator envelopeTrigger = synth.addParameter("trigger");
    Generator env = ADSR().attack(0.01).decay(0.5).sustain(0).release(0).trigger(envelopeTrigger);
    
    
    // set the synth's final output generator
    synth.setOutputGen( tone * env );
    
}

    void RenderImage(double time) {
        gl.Clear().ColorBuffer().DepthBuffer();
        //

        Mat4f perspective =
          CamMatrixf::PerspectiveX(Degrees(48), width, height, 1, 100);

        auto camera = CamMatrixf::Orbiting(
          Vec3f(0, 0, 0),
          GLfloat(4.0 - SineWave(time / 14.0)),
          FullCircles(time / 26.0),
          Degrees(45 + SineWave(time / 17.0) * 40));
        Vec3f camera_position = camera.Position();

        metal_prog.Use();
        metal_prog.camera_position.Set(camera_position);
        metal_prog.camera_matrix.Set(perspective * camera);

        plane.Use();
        plane.Draw();

        blob_prog.Use();
        blob_prog.camera_position.Set(camera_position);
        blob_prog.camera_matrix.Set(perspective * camera);

        grid.Use();

        int side = 1;
        for(int z = -side; z != side; ++z)
            for(int y = -side; y != side; ++y)
                for(int x = -side; x != side; ++x) {
                    blob_prog.grid_offset.Set(x, y, z);
                    grid.Draw();
                }
    }

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();
		//
		liquid_prog.time = time;


		auto camera = CamMatrixf::Orbiting(
			Vec3f(0, 0, 0),
			4.5 - SineWave(time / 14.0),
			FullCircles(time / 26.0),
			Degrees(55 + SineWave(time / 14.0) * 30)
		);
		Vec3f camera_position = camera.Position();

		liquid_prog.camera_position = camera_position;
		liquid_prog.camera_matrix = perspective*camera;

		for(int z=-grid_repeat; z!=grid_repeat; ++z)
		for(int x=-grid_repeat; x!=grid_repeat; ++x)
		{
			liquid_prog.grid_offset.Set(x, -0.5, z);
			grid.Draw();
		}

	}

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();
		//
		// set the matrix for camera orbiting the origin
		camera_matrix.Set(
			CamMatrixf::Orbiting(
				Vec3f(),
				4.0 - SineWave(time / 6.0) * 2.0,
				FullCircles(time * 0.4),
				Degrees(SineWave(time / 30.0) * 90)
			)
		);

		// set the model matrix
		model_matrix.Set(
			ModelMatrixf::RotationZ(FullCircles(time * 0.1))
		);

		cube.Bind();
		gl.CullFace(Face::Front);
		cube_instr.Draw(cube_indices);
		gl.CullFace(Face::Back);
		cube_instr.Draw(cube_indices);
	}

    void Render(double time) {
        const double day_duration = 67.0;
        auto sun =
          Vec3f(0.000, 1.000, 0.000) * 1e10 * SineWave(time / day_duration) +
          Vec3f(0.000, 0.000, -1.000) * 1e10 * CosineWave(time / day_duration);

        auto camera = CamMatrixf::Orbiting(
          Vec3f(),
          5.0,
          FullCircles(-0.10 - time / 27.0),
          Degrees(-20 - SineWave(time / 17.0) * 30));

        auto model = ModelMatrixf::RotationA(
          Vec3f(1.0, 1.0, 1.0), FullCircles(time / 13.0));

        gl.Clear().ColorBuffer().DepthBuffer();

        sky_box.Use();
        sky_box_prog.Use();
        sky_box_camera_matrix.Set(camera);
        sky_box_sun_position.Set(sun);
        sky_box.Draw();

        shape.Use();
        shape_prog.Use();
        shape_model_matrix.Set(model);
        shape_camera_matrix.Set(camera);
        shape_camera_position.Set(camera.Position());
        shape_sun_position.Set(sun);
        shape.Draw();
    }

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();

		auto camera = CamMatrixf::Orbiting(
			Vec3f(),
			field.Radius()*(1.4 + SineWave(time / 6.0) * 0.2),
			FullCircles(time * 0.1),
			Degrees(SineWave(time / 30.0) * 90)
		);

		auto light = CamMatrixf::Orbiting(
			Vec3f(),
			field.Radius()*1.6,
			FullCircles(0.33-time * 0.07),
			Degrees(SineWave(time / 31.0) * 80)
		);

		prog.camera_matrix.Set(camera);
		prog.light_position.Set(light.Position());

		GLfloat fade_coef = 1.1*(1.0-CosineWave01(time / 90.0));
		prog.fade_coef.Set(fade_coef);

		field.Draw();
	}

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();
		//
		// set the matrix for camera orbiting the origin
		camera_matrix.Set(
			CamMatrixf::Orbiting(
				Vec3f(),
				4.5 - SineWave(time / 16.0) * 2.0,
				FullCircles(time / 12.0),
				Degrees(SineWave(time / 30.0) * 90)
			)
		);

		// set the model matrix
		model_matrix.Set(
			ModelMatrixf::RotationA(
				Vec3f(1.0f, 1.0f, 1.0f),
				FullCircles(time / 10.0)
			)
		);

		shape.Bind();
		shape_instr.Draw(shape_indices);
	}

	double Draw(double time)
	{
		assert(!shapes.empty());
		assert(ishape != shapes.end());
		shapes::ShapeWrapper& shape = *ishape;


		const double interval = 11.0;
		double segment = time - shape_time;
		double fade = segment*(interval-segment);
		fade -= 1.0;
		if(fade < 0.0) fade = 0.0;
		fade = std::sqrt(fade/interval);
		if(fade > 1.0) fade = 1.0;

		if(segment > interval)
		{
			if(++ishape == shapes.end())
			{
				ishape = shapes.begin();
			}
			shape_time = time;
		}

		gl.Clear().DepthBuffer();

		float dist = (1.0+SineWave(time / 13.0))*2.5;

		projection_matrix.Set(
			CamMatrixf::PerspectiveX(
				Degrees(45),
				1.0,
				1.0+dist,
				shape.BoundingSphere().Radius()*2.0+1.0+dist
			)
		);

		camera_matrix.Set(
			CamMatrixf::Orbiting(
				Vec3f(),
				shape.BoundingSphere().Radius()+1.5+dist,
				FullCircles(time / 27.0),
				Degrees(SineWave(time / 23.0) * 89)
			)
		);
		model_matrix.Set(
			ModelMatrixf::RotationA(
				Vec3f(1,1,1),
				FullCircles(time /-37.0)
			)
		);

		prog.Use();
		shape.Use();
		shape.Draw();

		return fade;
	}

	void Render(double time)
	{
		auto camera =
			CamMatrixf::Roll(Degrees(SineWave(time / 11.0)*7+SineWave(time/13.0)*5))*
			CamMatrixf::Orbiting(
				Vec3f(),
				40.0f,
				Degrees(SineWave(time / 11.0)*10+CosineWave(time/19.0)*10-90),
				Degrees(SineWave(time / 17.0)*10+SineWave(time/13.0)*10)
			);

		auto mm_identity = ModelMatrixf();
		auto mm_rotation = ModelMatrixf::RotationZ(FullCircles(time / 7.0));

		Uniform<Mat4f>* model_matrix = nullptr;

		GLuint drawing_fan = fan_index;
		auto drawing_driver =
			[
				&model_matrix,
				&mm_identity,
				&mm_rotation,
				&drawing_fan
			](GLuint phase) -> bool
			{
				if(phase == drawing_fan)
					model_matrix->Set(mm_rotation);
				else model_matrix->Set(mm_identity);
				return true;
			};

		// render the light mask
		light_fbo.Bind(Framebuffer::Target::Draw);

		gl.Clear().ColorBuffer().DepthBuffer();

		mask_vao.Bind();
		mask_prog.Use();
		mask_prog.camera_matrix.Set(camera);
		model_matrix = &mask_prog.model_matrix;

		meshes.Draw(drawing_driver);

		// render the final image
		DefaultFramebuffer().Bind(Framebuffer::Target::Draw);

		gl.Clear().ColorBuffer().DepthBuffer();

		draw_vao.Bind();
		draw_prog.Use();
		Vec4f lsp = projection * camera * Vec4f(light_position, 1.0);
		draw_prog.light_screen_pos = lsp.xyz()/lsp.w();
		draw_prog.camera_matrix.Set(camera);
		model_matrix = &draw_prog.model_matrix;

		meshes.Draw(drawing_driver);
	}

	Mat4f CameraMat(double time)
	{
		return CamMatrixf::Orbiting(
			Vec3f(0, 0, 0),
			5.0 - SineWave(time / 11.0),
			FullCircles(time / 23.0),
			Degrees(SineWave(time / 17.0) * 80)
		);
	}

	void Render(ExampleClock& clock)
	{
		positions.clear();
		ages.clear();

		// update the emitters and get the particle data
		for(auto i=emitters.begin(), e=emitters.end(); i!=e; ++i)
		{
			i->Update(clock);
			i->Upload(positions, ages);
		}
		assert(positions.size() == ages.size());

		// make a camera matrix
		auto cameraMatrix = CamMatrixf::Orbiting(
			Vec3f(),
			38.0 - SineWave(clock.Now().Seconds() / 6.0) * 17.0,
			FullCircles(clock.Now().Seconds() * 0.1),
			Degrees(SineWave(clock.Now().Seconds() / 20.0) * 60)
		);

		std::vector<float> depths(positions.size());
		std::vector<GLuint> indices(positions.size());
		// calculate the depths of the particles
		for(GLuint i=0, n=positions.size(); i!=n; ++i)
		{
			depths[i] = (cameraMatrix * Vec4f(positions[i], 1.0)).z();
			indices[i] = i;
		}

		// sort the indices by the depths
		std::sort(
			indices.begin(),
			indices.end(),
			[&depths](GLuint i, GLuint j)
			{
				return depths[i] < depths[j];
			}
		);

		// upload the particle positions
		pos_buf.Bind(Buffer::Target::Array);
		Buffer::Data(Buffer::Target::Array, positions, BufferUsage::DynamicDraw);
		// upload the particle ages
		age_buf.Bind(Buffer::Target::Array);
		Buffer::Data(Buffer::Target::Array, ages, BufferUsage::DynamicDraw);

		gl.Clear().ColorBuffer().DepthBuffer();
		camera_matrix.Set(cameraMatrix);
		// use the indices to draw the particles
		gl.DrawElements(
			PrimitiveType::Points,
			indices.size(),
			indices.data()
		);
	}

	void Render(double time)
	{
		float o = 2;
		float s = 24;
		prog.offset.Set(
			GLfloat(CosineWave(time/59.0)*o),
			GLfloat(SineWave(time/61.0)*o)
		);
		prog.scale.Set(GLfloat(s + 1 + SineWave(time / 19.0)*s));

		screen.Draw();
	}

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();

		CamMatrixf camera = CamMatrixf::Orbiting(
			Vec3f(),
			4.5f + float(SineWave(time / 25.0)),
			FullCircles(time / 30.0),
			Degrees(SineWave(time / 19.0) * 20)
		);
		light_prog.camera_matrix.Set(camera);
		flare_prog.camera_matrix.Set(camera);
		shape_prog.camera_matrix.Set(camera);
		shape_prog.camera_position.Set(camera.Position());

		shape_prog.model_matrix.Set(
			ModelMatrixf::RotationX(FullCircles(time / 30.0))
		);

		shape_prog.Use();
		shape.Draw();
		NoProgram().Use();

		lights.Bind();

		light_prog.Use();

		for(GLuint l=0; l!=n_flares; ++l)
		{
			queries[l].Begin(Query::Target::SamplesPassed);
			gl.DrawArrays(PrimitiveType::Points, l, 1);
			queries[l].End(Query::Target::SamplesPassed);
		}

		gl.Enable(Capability::Blend);
		gl.Disable(Capability::DepthTest);
		flare_prog.Use();
		for(GLuint l=0; l!=n_flares; ++l)
		{
			GLint samples = 0;
			queries[l].WaitForResult(samples);
			if(samples != 0)
			{
				flare_prog.samples = samples;
				gl.DrawArrays(PrimitiveType::Points, l, 1);
			}
		}
		gl.Enable(Capability::DepthTest);
		gl.Disable(Capability::Blend);
	}

	void Render(double time)
	{
		gl.Clear().ColorBuffer().DepthBuffer();

		camera_matrix.Set(
			CamMatrixf::Orbiting(
				Vec3f(),
				3.5 + SineWave(time / 6.0)*0.5,
				FullCircles(time * 0.2),
				Degrees(SineWave(time / 20.0) * 80)
			)
		);
		gl.DrawArrays(PrimitiveType::Points, 0, 1);
	}