services/surfaceflinger/tests/BufferGeneratorShader.h - third_party/android/platform/frameworks/native - Git at Google

 /*
  * Copyright 2018 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #pragma once

 #include <GLES3/gl3.h>
 #include <math/vec2.h>
 #include <math/vec3.h>
 #include <math/vec4.h>

 static const char* VERTEX_SHADER = R"SHADER__(#version 300 es
 precision highp float;

 layout(location = 0) in vec4 mesh_position;

 void main() {
     gl_Position = mesh_position;
 }
 )SHADER__";

 static const char* FRAGMENT_SHADER = R"SHADER__(#version 300 es
 precision highp float;

 layout(location = 0) uniform vec4 resolution;
 layout(location = 1) uniform float time;
 layout(location = 2) uniform vec3[4] SPHERICAL_HARMONICS;

 layout(location = 0) out vec4 fragColor;

 #define saturate(x) clamp(x, 0.0, 1.0)
 #define PI 3.14159265359

 //------------------------------------------------------------------------------
 // Distance field functions
 //------------------------------------------------------------------------------

 float sdPlane(in vec3 p) {
     return p.y;
 }

 float sdSphere(in vec3 p, float s) {
     return length(p) - s;
 }

 float sdTorus(in vec3 p, in vec2 t) {
     return length(vec2(length(p.xz) - t.x, p.y)) - t.y;
 }

 vec2 opUnion(vec2 d1, vec2 d2) {
     return d1.x < d2.x ? d1 : d2;
 }

 vec2 scene(in vec3 position) {
     vec2 scene = opUnion(
           vec2(sdPlane(position), 1.0),
           vec2(sdSphere(position - vec3(0.0, 0.4, 0.0), 0.4), 12.0)
     );
     return scene;
 }

 //------------------------------------------------------------------------------
 // Ray casting
 //------------------------------------------------------------------------------

 float shadow(in vec3 origin, in vec3 direction, in float tmin, in float tmax) {
     float hit = 1.0;

     for (float t = tmin; t < tmax; ) {
         float h = scene(origin + direction * t).x;
         if (h < 0.001) return 0.0;
         t += h;
         hit = min(hit, 10.0 * h / t);
     }

     return clamp(hit, 0.0, 1.0);
 }

 vec2 traceRay(in vec3 origin, in vec3 direction) {
     float tmin = 0.02;
     float tmax = 20.0;

     float material = -1.0;
     float t = tmin;

     for ( ; t < tmax; ) {
         vec2 hit = scene(origin + direction * t);
         if (hit.x < 0.002 || t > tmax) break;
         t += hit.x;
         material = hit.y;
     }

     if (t > tmax) {
         material = -1.0;
     }

     return vec2(t, material);
 }

 vec3 normal(in vec3 position) {
     vec3 epsilon = vec3(0.001, 0.0, 0.0);
     vec3 n = vec3(
           scene(position + epsilon.xyy).x - scene(position - epsilon.xyy).x,
           scene(position + epsilon.yxy).x - scene(position - epsilon.yxy).x,
           scene(position + epsilon.yyx).x - scene(position - epsilon.yyx).x);
     return normalize(n);
 }

 //------------------------------------------------------------------------------
 // BRDF
 //------------------------------------------------------------------------------

 float pow5(float x) {
     float x2 = x * x;
     return x2 * x2 * x;
 }

 float D_GGX(float linearRoughness, float NoH, const vec3 h) {
     // Walter et al. 2007, "Microfacet Models for Refraction through Rough Surfaces"
     float oneMinusNoHSquared = 1.0 - NoH * NoH;
     float a = NoH * linearRoughness;
     float k = linearRoughness / (oneMinusNoHSquared + a * a);
     float d = k * k * (1.0 / PI);
     return d;
 }

 float V_SmithGGXCorrelated(float linearRoughness, float NoV, float NoL) {
     // Heitz 2014, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs"
     float a2 = linearRoughness * linearRoughness;
     float GGXV = NoL * sqrt((NoV - a2 * NoV) * NoV + a2);
     float GGXL = NoV * sqrt((NoL - a2 * NoL) * NoL + a2);
     return 0.5 / (GGXV + GGXL);
 }

 vec3 F_Schlick(const vec3 f0, float VoH) {
     // Schlick 1994, "An Inexpensive BRDF Model for Physically-Based Rendering"
     return f0 + (vec3(1.0) - f0) * pow5(1.0 - VoH);
 }

 float F_Schlick(float f0, float f90, float VoH) {
     return f0 + (f90 - f0) * pow5(1.0 - VoH);
 }

 float Fd_Burley(float linearRoughness, float NoV, float NoL, float LoH) {
     // Burley 2012, "Physically-Based Shading at Disney"
     float f90 = 0.5 + 2.0 * linearRoughness * LoH * LoH;
     float lightScatter = F_Schlick(1.0, f90, NoL);
     float viewScatter  = F_Schlick(1.0, f90, NoV);
     return lightScatter * viewScatter * (1.0 / PI);
 }

 float Fd_Lambert() {
     return 1.0 / PI;
 }

 //------------------------------------------------------------------------------
 // Indirect lighting
 //------------------------------------------------------------------------------

 vec3 Irradiance_SphericalHarmonics(const vec3 n) {
     return max(
           SPHERICAL_HARMONICS[0]
         + SPHERICAL_HARMONICS[1] * (n.y)
         + SPHERICAL_HARMONICS[2] * (n.z)
         + SPHERICAL_HARMONICS[3] * (n.x)
         , 0.0);
 }

 vec2 PrefilteredDFG_Karis(float roughness, float NoV) {
     // Karis 2014, "Physically Based Material on Mobile"
     const vec4 c0 = vec4(-1.0, -0.0275, -0.572,  0.022);
     const vec4 c1 = vec4( 1.0,  0.0425,  1.040, -0.040);

     vec4 r = roughness * c0 + c1;
     float a004 = min(r.x * r.x, exp2(-9.28 * NoV)) * r.x + r.y;

     return vec2(-1.04, 1.04) * a004 + r.zw;
 }

 //------------------------------------------------------------------------------
 // Tone mapping and transfer functions
 //------------------------------------------------------------------------------

 vec3 Tonemap_ACES(const vec3 x) {
     // Narkowicz 2015, "ACES Filmic Tone Mapping Curve"
     const float a = 2.51;
     const float b = 0.03;
     const float c = 2.43;
     const float d = 0.59;
     const float e = 0.14;
     return (x * (a * x + b)) / (x * (c * x + d) + e);
 }

 vec3 OECF_sRGBFast(const vec3 linear) {
     return pow(linear, vec3(1.0 / 2.2));
 }

 //------------------------------------------------------------------------------
 // Rendering
 //------------------------------------------------------------------------------

 vec3 render(in vec3 origin, in vec3 direction, out float distance) {
     // Sky gradient
     vec3 color = vec3(0.65, 0.85, 1.0) + direction.y * 0.72;

     // (distance, material)
     vec2 hit = traceRay(origin, direction);
     distance = hit.x;
     float material = hit.y;

     // We've hit something in the scene
     if (material > 0.0) {
         vec3 position = origin + distance * direction;

         vec3 v = normalize(-direction);
         vec3 n = normal(position);
         vec3 l = normalize(vec3(0.6, 0.7, -0.7));
         vec3 h = normalize(v + l);
         vec3 r = normalize(reflect(direction, n));

         float NoV = abs(dot(n, v)) + 1e-5;
         float NoL = saturate(dot(n, l));
         float NoH = saturate(dot(n, h));
         float LoH = saturate(dot(l, h));

         vec3 baseColor = vec3(0.0);
         float roughness = 0.0;
         float metallic = 0.0;

         float intensity = 2.0;
         float indirectIntensity = 0.64;

         if (material < 4.0)  {
             // Checkerboard floor
             float f = mod(floor(6.0 * position.z) + floor(6.0 * position.x), 2.0);
             baseColor = 0.4 + f * vec3(0.6);
             roughness = 0.1;
         } else if (material < 16.0) {
             // Metallic objects
             baseColor = vec3(0.3, 0.0, 0.0);
             roughness = 0.2;
         }

         float linearRoughness = roughness * roughness;
         vec3 diffuseColor = (1.0 - metallic) * baseColor.rgb;
         vec3 f0 = 0.04 * (1.0 - metallic) + baseColor.rgb * metallic;

         float attenuation = shadow(position, l, 0.02, 2.5);

         // specular BRDF
         float D = D_GGX(linearRoughness, NoH, h);
         float V = V_SmithGGXCorrelated(linearRoughness, NoV, NoL);
         vec3  F = F_Schlick(f0, LoH);
         vec3 Fr = (D * V) * F;

         // diffuse BRDF
         vec3 Fd = diffuseColor * Fd_Burley(linearRoughness, NoV, NoL, LoH);

         color = Fd + Fr;
         color *= (intensity * attenuation * NoL) * vec3(0.98, 0.92, 0.89);

         // diffuse indirect
         vec3 indirectDiffuse = Irradiance_SphericalHarmonics(n) * Fd_Lambert();

         vec2 indirectHit = traceRay(position, r);
         vec3 indirectSpecular = vec3(0.65, 0.85, 1.0) + r.y * 0.72;
         if (indirectHit.y > 0.0) {
             if (indirectHit.y < 4.0)  {
                 vec3 indirectPosition = position + indirectHit.x * r;
                 // Checkerboard floor
                 float f = mod(floor(6.0 * indirectPosition.z) + floor(6.0 * indirectPosition.x), 2.0);
                 indirectSpecular = 0.4 + f * vec3(0.6);
             } else if (indirectHit.y < 16.0) {
                 // Metallic objects
                 indirectSpecular = vec3(0.3, 0.0, 0.0);
             }
         }

         // indirect contribution
         vec2 dfg = PrefilteredDFG_Karis(roughness, NoV);
         vec3 specularColor = f0 * dfg.x + dfg.y;
         vec3 ibl = diffuseColor * indirectDiffuse + indirectSpecular * specularColor;

         color += ibl * indirectIntensity;
     }

     return color;
 }

 //------------------------------------------------------------------------------
 // Setup and execution
 //------------------------------------------------------------------------------

 mat3 setCamera(in vec3 origin, in vec3 target, float rotation) {
     vec3 forward = normalize(target - origin);
     vec3 orientation = vec3(sin(rotation), cos(rotation), 0.0);
     vec3 left = normalize(cross(forward, orientation));
     vec3 up = normalize(cross(left, forward));
     return mat3(left, up, forward);
 }

 void main() {
     // Normalized coordinates
     vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / resolution.xy;
     // Aspect ratio
     p.x *= resolution.x / resolution.y;

     // Camera position and "look at"
     vec3 origin = vec3(0.0, 1.0, 0.0);
     vec3 target = vec3(0.0);

     origin.x += 2.0 * cos(time * 0.2);
     origin.z += 2.0 * sin(time * 0.2);

     mat3 toWorld = setCamera(origin, target, 0.0);
     vec3 direction = toWorld * normalize(vec3(p.xy, 2.0));

     // Render scene
     float distance;
     vec3 color = render(origin, direction, distance);

     // Tone mapping
     color = Tonemap_ACES(color);

     // Exponential distance fog
     color = mix(color, 0.8 * vec3(0.7, 0.8, 1.0), 1.0 - exp2(-0.011 * distance * distance));

     // Gamma compression
     color = OECF_sRGBFast(color);

     fragColor = vec4(color, 1.0);
 }
 )SHADER__";

 static const android::vec3 SPHERICAL_HARMONICS[4] =
         {{0.754554516862612, 0.748542953903366, 0.790921515418539},
          {-0.083856548007422, 0.092533500963210, 0.322764661032516},
          {0.308152705331738, 0.366796330467391, 0.466698181299906},
          {-0.188884931542396, -0.277402551592231, -0.377844212327557}};

 static const android::vec4 TRIANGLE[3] = {{-1.0f, -1.0f, 1.0f, 1.0f},
                                           {3.0f, -1.0f, 1.0f, 1.0f},
                                           {-1.0f, 3.0f, 1.0f, 1.0f}};
	/*
	* Copyright 2018 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#pragma once

	#include <GLES3/gl3.h>
	#include <math/vec2.h>
	#include <math/vec3.h>
	#include <math/vec4.h>

	static const char* VERTEX_SHADER = R"SHADER__(#version 300 es
	precision highp float;

	layout(location = 0) in vec4 mesh_position;

	void main() {
	gl_Position = mesh_position;
	}
	)SHADER__";

	static const char* FRAGMENT_SHADER = R"SHADER__(#version 300 es
	precision highp float;

	layout(location = 0) uniform vec4 resolution;
	layout(location = 1) uniform float time;
	layout(location = 2) uniform vec3[4] SPHERICAL_HARMONICS;

	layout(location = 0) out vec4 fragColor;

	#define saturate(x) clamp(x, 0.0, 1.0)
	#define PI 3.14159265359

	//------------------------------------------------------------------------------
	// Distance field functions
	//------------------------------------------------------------------------------

	float sdPlane(in vec3 p) {
	return p.y;
	}

	float sdSphere(in vec3 p, float s) {
	return length(p) - s;
	}

	float sdTorus(in vec3 p, in vec2 t) {
	return length(vec2(length(p.xz) - t.x, p.y)) - t.y;
	}

	vec2 opUnion(vec2 d1, vec2 d2) {
	return d1.x < d2.x ? d1 : d2;
	}

	vec2 scene(in vec3 position) {
	vec2 scene = opUnion(
	vec2(sdPlane(position), 1.0),
	vec2(sdSphere(position - vec3(0.0, 0.4, 0.0), 0.4), 12.0)
	);
	return scene;
	}

	//------------------------------------------------------------------------------
	// Ray casting
	//------------------------------------------------------------------------------

	float shadow(in vec3 origin, in vec3 direction, in float tmin, in float tmax) {
	float hit = 1.0;

	for (float t = tmin; t < tmax; ) {
	float h = scene(origin + direction * t).x;
	if (h < 0.001) return 0.0;
	t += h;
	hit = min(hit, 10.0 * h / t);
	}

	return clamp(hit, 0.0, 1.0);
	}

	vec2 traceRay(in vec3 origin, in vec3 direction) {
	float tmin = 0.02;
	float tmax = 20.0;

	float material = -1.0;
	float t = tmin;

	for ( ; t < tmax; ) {
	vec2 hit = scene(origin + direction * t);
	if (hit.x < 0.002 \|\| t > tmax) break;
	t += hit.x;
	material = hit.y;
	}

	if (t > tmax) {
	material = -1.0;
	}

	return vec2(t, material);
	}

	vec3 normal(in vec3 position) {
	vec3 epsilon = vec3(0.001, 0.0, 0.0);
	vec3 n = vec3(
	scene(position + epsilon.xyy).x - scene(position - epsilon.xyy).x,
	scene(position + epsilon.yxy).x - scene(position - epsilon.yxy).x,
	scene(position + epsilon.yyx).x - scene(position - epsilon.yyx).x);
	return normalize(n);
	}

	//------------------------------------------------------------------------------
	// BRDF
	//------------------------------------------------------------------------------

	float pow5(float x) {
	float x2 = x * x;
	return x2 * x2 * x;
	}

	float D_GGX(float linearRoughness, float NoH, const vec3 h) {
	// Walter et al. 2007, "Microfacet Models for Refraction through Rough Surfaces"
	float oneMinusNoHSquared = 1.0 - NoH * NoH;
	float a = NoH * linearRoughness;
	float k = linearRoughness / (oneMinusNoHSquared + a * a);
	float d = k * k * (1.0 / PI);
	return d;
	}

	float V_SmithGGXCorrelated(float linearRoughness, float NoV, float NoL) {
	// Heitz 2014, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs"
	float a2 = linearRoughness * linearRoughness;
	float GGXV = NoL * sqrt((NoV - a2 * NoV) * NoV + a2);
	float GGXL = NoV * sqrt((NoL - a2 * NoL) * NoL + a2);
	return 0.5 / (GGXV + GGXL);
	}

	vec3 F_Schlick(const vec3 f0, float VoH) {
	// Schlick 1994, "An Inexpensive BRDF Model for Physically-Based Rendering"
	return f0 + (vec3(1.0) - f0) * pow5(1.0 - VoH);
	}

	float F_Schlick(float f0, float f90, float VoH) {
	return f0 + (f90 - f0) * pow5(1.0 - VoH);
	}

	float Fd_Burley(float linearRoughness, float NoV, float NoL, float LoH) {
	// Burley 2012, "Physically-Based Shading at Disney"
	float f90 = 0.5 + 2.0 * linearRoughness * LoH * LoH;
	float lightScatter = F_Schlick(1.0, f90, NoL);
	float viewScatter = F_Schlick(1.0, f90, NoV);
	return lightScatter * viewScatter * (1.0 / PI);
	}

	float Fd_Lambert() {
	return 1.0 / PI;
	}

	//------------------------------------------------------------------------------
	// Indirect lighting
	//------------------------------------------------------------------------------

	vec3 Irradiance_SphericalHarmonics(const vec3 n) {
	return max(
	SPHERICAL_HARMONICS[0]
	+ SPHERICAL_HARMONICS[1] * (n.y)
	+ SPHERICAL_HARMONICS[2] * (n.z)
	+ SPHERICAL_HARMONICS[3] * (n.x)
	, 0.0);
	}

	vec2 PrefilteredDFG_Karis(float roughness, float NoV) {
	// Karis 2014, "Physically Based Material on Mobile"
	const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
	const vec4 c1 = vec4( 1.0, 0.0425, 1.040, -0.040);

	vec4 r = roughness * c0 + c1;
	float a004 = min(r.x * r.x, exp2(-9.28 * NoV)) * r.x + r.y;

	return vec2(-1.04, 1.04) * a004 + r.zw;
	}

	//------------------------------------------------------------------------------
	// Tone mapping and transfer functions
	//------------------------------------------------------------------------------

	vec3 Tonemap_ACES(const vec3 x) {
	// Narkowicz 2015, "ACES Filmic Tone Mapping Curve"
	const float a = 2.51;
	const float b = 0.03;
	const float c = 2.43;
	const float d = 0.59;
	const float e = 0.14;
	return (x * (a * x + b)) / (x * (c * x + d) + e);
	}

	vec3 OECF_sRGBFast(const vec3 linear) {
	return pow(linear, vec3(1.0 / 2.2));
	}

	//------------------------------------------------------------------------------
	// Rendering
	//------------------------------------------------------------------------------

	vec3 render(in vec3 origin, in vec3 direction, out float distance) {
	// Sky gradient
	vec3 color = vec3(0.65, 0.85, 1.0) + direction.y * 0.72;

	// (distance, material)
	vec2 hit = traceRay(origin, direction);
	distance = hit.x;
	float material = hit.y;

	// We've hit something in the scene
	if (material > 0.0) {
	vec3 position = origin + distance * direction;

	vec3 v = normalize(-direction);
	vec3 n = normal(position);
	vec3 l = normalize(vec3(0.6, 0.7, -0.7));
	vec3 h = normalize(v + l);
	vec3 r = normalize(reflect(direction, n));

	float NoV = abs(dot(n, v)) + 1e-5;
	float NoL = saturate(dot(n, l));
	float NoH = saturate(dot(n, h));
	float LoH = saturate(dot(l, h));

	vec3 baseColor = vec3(0.0);
	float roughness = 0.0;
	float metallic = 0.0;

	float intensity = 2.0;
	float indirectIntensity = 0.64;

	if (material < 4.0) {
	// Checkerboard floor
	float f = mod(floor(6.0 * position.z) + floor(6.0 * position.x), 2.0);
	baseColor = 0.4 + f * vec3(0.6);
	roughness = 0.1;
	} else if (material < 16.0) {
	// Metallic objects
	baseColor = vec3(0.3, 0.0, 0.0);
	roughness = 0.2;
	}

	float linearRoughness = roughness * roughness;
	vec3 diffuseColor = (1.0 - metallic) * baseColor.rgb;
	vec3 f0 = 0.04 * (1.0 - metallic) + baseColor.rgb * metallic;

	float attenuation = shadow(position, l, 0.02, 2.5);

	// specular BRDF
	float D = D_GGX(linearRoughness, NoH, h);
	float V = V_SmithGGXCorrelated(linearRoughness, NoV, NoL);
	vec3 F = F_Schlick(f0, LoH);
	vec3 Fr = (D * V) * F;

	// diffuse BRDF
	vec3 Fd = diffuseColor * Fd_Burley(linearRoughness, NoV, NoL, LoH);

	color = Fd + Fr;
	color = (intensity attenuation * NoL) * vec3(0.98, 0.92, 0.89);

	// diffuse indirect
	vec3 indirectDiffuse = Irradiance_SphericalHarmonics(n) * Fd_Lambert();

	vec2 indirectHit = traceRay(position, r);
	vec3 indirectSpecular = vec3(0.65, 0.85, 1.0) + r.y * 0.72;
	if (indirectHit.y > 0.0) {
	if (indirectHit.y < 4.0) {
	vec3 indirectPosition = position + indirectHit.x * r;
	// Checkerboard floor
	float f = mod(floor(6.0 * indirectPosition.z) + floor(6.0 * indirectPosition.x), 2.0);
	indirectSpecular = 0.4 + f * vec3(0.6);
	} else if (indirectHit.y < 16.0) {
	// Metallic objects
	indirectSpecular = vec3(0.3, 0.0, 0.0);
	}
	}

	// indirect contribution
	vec2 dfg = PrefilteredDFG_Karis(roughness, NoV);
	vec3 specularColor = f0 * dfg.x + dfg.y;
	vec3 ibl = diffuseColor * indirectDiffuse + indirectSpecular * specularColor;

	color += ibl * indirectIntensity;
	}

	return color;
	}

	//------------------------------------------------------------------------------
	// Setup and execution
	//------------------------------------------------------------------------------

	mat3 setCamera(in vec3 origin, in vec3 target, float rotation) {
	vec3 forward = normalize(target - origin);
	vec3 orientation = vec3(sin(rotation), cos(rotation), 0.0);
	vec3 left = normalize(cross(forward, orientation));
	vec3 up = normalize(cross(left, forward));
	return mat3(left, up, forward);
	}

	void main() {
	// Normalized coordinates
	vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / resolution.xy;
	// Aspect ratio
	p.x *= resolution.x / resolution.y;

	// Camera position and "look at"
	vec3 origin = vec3(0.0, 1.0, 0.0);
	vec3 target = vec3(0.0);

	origin.x += 2.0 * cos(time * 0.2);
	origin.z += 2.0 * sin(time * 0.2);

	mat3 toWorld = setCamera(origin, target, 0.0);
	vec3 direction = toWorld * normalize(vec3(p.xy, 2.0));

	// Render scene
	float distance;
	vec3 color = render(origin, direction, distance);

	// Tone mapping
	color = Tonemap_ACES(color);

	// Exponential distance fog
	color = mix(color, 0.8 * vec3(0.7, 0.8, 1.0), 1.0 - exp2(-0.011 * distance * distance));

	// Gamma compression
	color = OECF_sRGBFast(color);

	fragColor = vec4(color, 1.0);
	}
	)SHADER__";

	static const android::vec3 SPHERICAL_HARMONICS[4] =
	{{0.754554516862612, 0.748542953903366, 0.790921515418539},
	{-0.083856548007422, 0.092533500963210, 0.322764661032516},
	{0.308152705331738, 0.366796330467391, 0.466698181299906},
	{-0.188884931542396, -0.277402551592231, -0.377844212327557}};

	static const android::vec4 TRIANGLE[3] = {{-1.0f, -1.0f, 1.0f, 1.0f},
	{3.0f, -1.0f, 1.0f, 1.0f},
	{-1.0f, 3.0f, 1.0f, 1.0f}};