326 lines
11 KiB
C++
326 lines
11 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 2015-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "material.h"
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#include <3d_math.h>
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#include <wx/debug.h>
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int MATERIAL::m_defaultRefractionRayCount = 4;
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int MATERIAL::m_defaultReflectionRayCount = 3;
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int MATERIAL::m_defaultRefractionRecursionCount = 2;
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int MATERIAL::m_defaultFeflectionRecursionCount = 3;
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// This may be a good value if based on nr of lights
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// that contribute to the illumination of that point
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#define AMBIENT_FACTOR (1.0f / 6.0f)
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#define SPECULAR_FACTOR 1.0f
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MATERIAL::MATERIAL()
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{
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m_ambientColor = SFVEC3F( 0.2f, 0.2f, 0.2f );
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m_emissiveColor = SFVEC3F( 0.0f, 0.0f, 0.0f );
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m_specularColor = SFVEC3F( 1.0f, 1.0f, 1.0f );
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m_reflectivity = 50.2f;
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m_transparency = 0.0f; // completely opaque
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m_castShadows = true;
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m_reflection = 0.0f;
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m_absorbance = 1.0f;
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m_refractionRayCount = m_defaultRefractionRayCount;
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m_reflectionRayCount = m_defaultReflectionRayCount;
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m_refractionRecursionCount = m_defaultRefractionRecursionCount;
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m_reflectionRecursionCount = m_defaultFeflectionRecursionCount;
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m_generator = nullptr;
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}
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MATERIAL::MATERIAL( const SFVEC3F& aAmbient, const SFVEC3F& aEmissive, const SFVEC3F& aSpecular,
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float aShinness, float aTransparency, float aReflection )
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{
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wxASSERT( aReflection >= 0.0f );
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wxASSERT( aReflection <= 1.0f );
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wxASSERT( aTransparency >= 0.0f );
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wxASSERT( aTransparency <= 1.0f );
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wxASSERT( aShinness >= 0.0f );
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wxASSERT( aShinness <= 180.0f );
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m_ambientColor = aAmbient * SFVEC3F(AMBIENT_FACTOR);
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m_emissiveColor = aEmissive;
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m_specularColor = aSpecular;
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m_reflectivity = aShinness;
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m_transparency = glm::clamp( aTransparency, 0.0f, 1.0f );
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m_absorbance = 1.0f;
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m_reflection = aReflection;
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m_castShadows = true;
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m_refractionRayCount = m_defaultRefractionRayCount;
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m_reflectionRayCount = m_defaultReflectionRayCount;
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m_refractionRecursionCount = m_defaultRefractionRecursionCount;
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m_reflectionRecursionCount = m_defaultFeflectionRecursionCount;
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m_generator = nullptr;
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}
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void MATERIAL::Generate( SFVEC3F& aNormal, const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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if( m_generator )
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{
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aNormal = aNormal + m_generator->Generate( aRay, aHitInfo );
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aNormal = glm::normalize( aNormal );
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}
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}
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// https://en.wikipedia.org/wiki/Blinn%E2%80%93Phong_shading_model
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SFVEC3F BLINN_PHONG_MATERIAL::Shade( const RAY& aRay, const HITINFO& aHitInfo, float NdotL,
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const SFVEC3F& aDiffuseObjColor, const SFVEC3F& aDirToLight,
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const SFVEC3F& aLightColor,
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float aShadowAttenuationFactor ) const
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{
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wxASSERT( NdotL >= FLT_EPSILON );
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// This is a hack to get some kind of fake ambient illumination
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// There is no logic behind this, just pure artistic experimentation
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if( aShadowAttenuationFactor > FLT_EPSILON )
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{
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// Calculate the diffuse light factoring in light color,
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// power and the attenuation
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const SFVEC3F diffuse = NdotL * aLightColor;
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// Calculate the half vector between the light vector and the view vector.
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const SFVEC3F H = glm::normalize( aDirToLight - aRay.m_Dir );
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//Intensity of the specular light
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const float NdotH = glm::dot( H, aHitInfo.m_HitNormal );
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const float intensitySpecular = glm::pow( glm::max( NdotH, 0.0f ), m_reflectivity );
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return m_ambientColor +
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aShadowAttenuationFactor * ( diffuse * aDiffuseObjColor + SPECULAR_FACTOR *
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aLightColor * intensitySpecular * m_specularColor );
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}
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return m_ambientColor;
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}
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MATERIAL_GENERATOR::MATERIAL_GENERATOR()
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{
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}
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static PerlinNoise s_perlinNoise = PerlinNoise( 0 );
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BOARD_NORMAL::BOARD_NORMAL( float aScale ) : MATERIAL_GENERATOR()
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{
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m_scale = ( 2.0f * glm::pi<float>() ) / aScale;
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}
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SFVEC3F BOARD_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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const SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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// http://www.fooplot.com/#W3sidHlwZSI6MCwiZXEiOiJzaW4oc2luKHNpbih4KSoxLjkpKjEuNSkiLCJjb2xvciI6IiMwMDAwMDAifSx7InR5cGUiOjEwMDAsIndpbmRvdyI6WyItMC45NjIxMDU3MDgwNzg1MjYyIiwiNy45NzE0MjYyNjc2MDE0MyIsIi0yLjUxNzYyMDM1MTQ4MjQ0OSIsIjIuOTc5OTM3Nzg3Mzk3NTMwMyJdLCJzaXplIjpbNjQ2LDM5Nl19XQ--
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// Implement a texture as the "measling crazing blistering" method of FR4
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const float x = glm::sin( glm::sin( hitPos.x ) * 1.5f ) * 0.06f;
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const float y = glm::sin( glm::sin( hitPos.y ) * 1.5f ) * 0.03f;
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const float z = -(x + y) + glm::sin( hitPos.z ) * 0.06f;
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const float noise1 = s_perlinNoise.noise( hitPos.x * 1.0f, hitPos.y * 0.7f ) - 0.5f;
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const float noise2 = s_perlinNoise.noise( hitPos.x * 0.7f, hitPos.y * 1.0f ) - 0.5f;
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const float noise3 = s_perlinNoise.noise( hitPos.x * 0.3f, hitPos.z * 1.0f ) - 0.5f;
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return ( SFVEC3F( noise1, noise2, -( noise3 ) ) * 0.3f + SFVEC3F( x, y, z ) );
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}
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COPPER_NORMAL::COPPER_NORMAL( float aScale, const MATERIAL_GENERATOR* aBoardNormalGenerator )
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{
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m_board_normal_generator = aBoardNormalGenerator;
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m_scale = 1.0f / aScale;
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}
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SFVEC3F COPPER_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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if( m_board_normal_generator )
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{
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const SFVEC3F boardNormal = m_board_normal_generator->Generate( aRay, aHitInfo );
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SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise =
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( s_perlinNoise.noise( hitPos.x + boardNormal.y + aRay.m_Origin.x * 0.2f,
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hitPos.y + boardNormal.x ) - 0.5f ) * 2.0f;
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float scratchPattern =
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( s_perlinNoise.noise( noise + hitPos.x / 100.0f, hitPos.y * 100.0f ) - 0.5f );
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const float x = scratchPattern * 0.14f;
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const float y = (noise + noise * scratchPattern) * 0.14f;
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return SFVEC3F( x, y, - ( x + y ) ) + boardNormal * 0.25f;
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}
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else
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{
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return SFVEC3F( 0.0f );
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}
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}
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SOLDER_MASK_NORMAL::SOLDER_MASK_NORMAL( const MATERIAL_GENERATOR* aCopperNormalGenerator )
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{
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m_copper_normal_generator = aCopperNormalGenerator;
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}
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SFVEC3F SOLDER_MASK_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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if( m_copper_normal_generator )
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{
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const SFVEC3F copperNormal = m_copper_normal_generator->Generate( aRay, aHitInfo );
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return copperNormal * 0.05f;
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}
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else
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{
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return SFVEC3F( 0.0f );
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}
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}
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SFVEC3F PLATED_COPPER_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise1 = ( s_perlinNoise.noise( hitPos.x, hitPos.y ) - 0.5f );
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const float noise2 = ( s_perlinNoise.noise( hitPos.y, hitPos.x ) - 0.5f );
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return SFVEC3F( noise1, noise2, -( noise1 + noise2 ) ) * 0.02f;
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}
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PLASTIC_NORMAL::PLASTIC_NORMAL( float aScale )
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{
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m_scale = 1.0f / aScale;
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}
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SFVEC3F PLASTIC_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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const SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise1 = s_perlinNoise.noise( hitPos.x * 1.0f, hitPos.y * 1.1f,
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hitPos.z * 1.2f ) - 0.5f;
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const float noise2 = s_perlinNoise.noise( hitPos.x * 1.3f, hitPos.y * 1.0f,
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hitPos.z * 1.5f ) - 0.5f;
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const float noise3 = s_perlinNoise.noise( hitPos.x * 1.0f, hitPos.y * 1.0f,
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hitPos.z * 1.8f ) - 0.5f;
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const float distanceReduction = 1.0f / ( aHitInfo.m_tHit + 0.5f );
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return SFVEC3F( noise1, noise2, noise3 ) * SFVEC3F( distanceReduction );
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}
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PLASTIC_SHINE_NORMAL::PLASTIC_SHINE_NORMAL( float aScale )
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{
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m_scale = 1.0f / aScale;
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}
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SFVEC3F PLASTIC_SHINE_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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const SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise1 = s_perlinNoise.noise( hitPos.x * 0.01f, hitPos.y * 0.01f,
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hitPos.z * 0.01f ) - 0.5f;
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const float noise2 = s_perlinNoise.noise( hitPos.x * 1.0f, hitPos.y * 1.0f,
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hitPos.z * 1.6f ) - 0.5f;
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float noise3 = s_perlinNoise.noise( hitPos.x * 1.5f, hitPos.y * 1.5f,
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hitPos.z * 1.0f ) - 0.5f;
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noise3 = noise3 * noise3 * noise3;
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return SFVEC3F( noise1, noise2, noise3 ) * SFVEC3F( 0.1f, 0.2f, 1.0f );
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}
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BRUSHED_METAL_NORMAL::BRUSHED_METAL_NORMAL( float aScale )
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{
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m_scale = 1.0f / aScale;
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}
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SFVEC3F BRUSHED_METAL_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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const SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise1 = s_perlinNoise.noise( hitPos.x * 1.0f, hitPos.y * 1.1f,
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hitPos.z * 1.2f ) - 0.5f;
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const float noise2 = s_perlinNoise.noise( hitPos.x * 1.3f, hitPos.y * 1.4f,
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hitPos.z * 1.5f ) - 0.5f;
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const float noise3 = s_perlinNoise.noise( hitPos.x * 0.1f, hitPos.y * 0.1f,
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hitPos.z * 1.0f ) - 0.5f;
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return SFVEC3F( noise1 * 0.15f + noise3 * 0.35f, noise2 * 0.25f, noise1 * noise2 * noise3 );
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}
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SILK_SCREEN_NORMAL::SILK_SCREEN_NORMAL( float aScale )
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{
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m_scale = 1.0f / aScale;
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}
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SFVEC3F SILK_SCREEN_NORMAL::Generate( const RAY& aRay, const HITINFO& aHitInfo ) const
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{
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const SFVEC3F hitPos = aHitInfo.m_HitPoint * m_scale;
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const float noise1 = s_perlinNoise.noise( hitPos.x * 2.0f, hitPos.y * 2.0f, hitPos.z );
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const float noise2 = s_perlinNoise.noise( hitPos.x * 0.6f, hitPos.y * 0.6f, hitPos.z );
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SFVEC3F t = SFVEC3F( noise1, noise2, 0.0f ) - 0.5f;
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SFVEC3F tt = t * t;
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t = t * tt * tt * 100.0f; // this factor controls the intensity of the effect
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t.z = 0.0f; // this will keep untouch the original z component of the normal
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return t;
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}
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