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Basic model shading (#9374)

This commit is contained in:
Danila Shutov 2020-02-16 22:37:28 +03:00 committed by GitHub
parent 478e753298
commit 6958071f49
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 338 additions and 41 deletions
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131
client/shaders/object_shader/opengl_fragment.glsl Normal file
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@ -0,0 +1,131 @@
uniform sampler2D baseTexture;
uniform sampler2D normalTexture;
uniform sampler2D textureFlags;
uniform vec4 emissiveColor;
uniform vec4 skyBgColor;
uniform float fogDistance;
uniform vec3 eyePosition;
varying vec3 vNormal;
varying vec3 vPosition;
varying vec3 worldPosition;
varying vec3 eyeVec;
varying vec3 lightVec;
varying float vIDiff;
bool normalTexturePresent = false;
bool texTileableHorizontal = false;
bool texTileableVertical = false;
bool texSeamless = false;
const float e = 2.718281828459;
const float BS = 10.0;
const float fogStart = FOG_START;
const float fogShadingParameter = 1 / ( 1 - fogStart);
void get_texture_flags()
{
vec4 flags = texture2D(textureFlags, vec2(0.0, 0.0));
if (flags.r > 0.5) {
normalTexturePresent = true;
}
if (flags.g > 0.5) {
texTileableHorizontal = true;
}
if (flags.b > 0.5) {
texTileableVertical = true;
}
if (texTileableHorizontal && texTileableVertical) {
texSeamless = true;
}
}
float intensity(vec3 color)
{
return (color.r + color.g + color.b) / 3.0;
}
float get_rgb_height(vec2 uv)
{
if (texSeamless) {
return intensity(texture2D(baseTexture, uv).rgb);
} else {
return intensity(texture2D(baseTexture, clamp(uv, 0.0, 0.999)).rgb);
}
}
vec4 get_normal_map(vec2 uv)
{
vec4 bump = texture2D(normalTexture, uv).rgba;
bump.xyz = normalize(bump.xyz * 2.0 - 1.0);
return bump;
}
void main(void)
{
vec3 color;
vec4 bump;
vec2 uv = gl_TexCoord[0].st;
bool use_normalmap = false;
get_texture_flags();
#if USE_NORMALMAPS == 1
if (normalTexturePresent) {
bump = get_normal_map(uv);
use_normalmap = true;
}
#endif
#if GENERATE_NORMALMAPS == 1
if (normalTexturePresent == false) {
float tl = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y + SAMPLE_STEP));
float t = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y - SAMPLE_STEP));
float tr = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y + SAMPLE_STEP));
float r = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y));
float br = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y - SAMPLE_STEP));
float b = get_rgb_height(vec2(uv.x, uv.y - SAMPLE_STEP));
float bl = get_rgb_height(vec2(uv.x -SAMPLE_STEP, uv.y - SAMPLE_STEP));
float l = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y));
float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
bump = vec4(normalize(vec3 (dX, dY, NORMALMAPS_STRENGTH)), 1.0);
use_normalmap = true;
}
#endif
vec4 base = texture2D(baseTexture, uv).rgba;
#ifdef ENABLE_BUMPMAPPING
if (use_normalmap) {
vec3 L = normalize(lightVec);
vec3 E = normalize(eyeVec);
float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0), 1.0);
float diffuse = dot(-E,bump.xyz);
color = (diffuse + 0.1 * specular) * base.rgb;
} else {
color = base.rgb;
}
#else
color = base.rgb;
#endif
vec4 col = vec4(color.rgb, base.a);
col.rgb *= emissiveColor.rgb * vIDiff;
// Due to a bug in some (older ?) graphics stacks (possibly in the glsl compiler ?),
// the fog will only be rendered correctly if the last operation before the
// clamp() is an addition. Else, the clamp() seems to be ignored.
// E.g. the following won't work:
// float clarity = clamp(fogShadingParameter
// * (fogDistance - length(eyeVec)) / fogDistance), 0.0, 1.0);
// As additions usually come for free following a multiplication, the new formula
// should be more efficient as well.
// Note: clarity = (1 - fogginess)
float clarity = clamp(fogShadingParameter
- fogShadingParameter * length(eyeVec) / fogDistance, 0.0, 1.0);
col = mix(skyBgColor, col, clarity);
gl_FragColor = vec4(col.rgb, base.a);
}

44
client/shaders/object_shader/opengl_vertex.glsl Normal file
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@ -0,0 +1,44 @@
uniform mat4 mWorldViewProj;
uniform mat4 mWorld;
uniform vec3 eyePosition;
uniform float animationTimer;
varying vec3 vNormal;
varying vec3 vPosition;
varying vec3 worldPosition;
varying vec3 eyeVec;
varying vec3 lightVec;
varying float vIDiff;
const float e = 2.718281828459;
const float BS = 10.0;
float directional_ambient(vec3 normal)
{
vec3 v = normal * normal;
if (normal.y < 0)
return dot(v, vec3(0.670820f, 0.447213f, 0.836660f));
return dot(v, vec3(0.670820f, 1.000000f, 0.836660f));
}
void main(void)
{
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_Position = mWorldViewProj * gl_Vertex;
vPosition = gl_Position.xyz;
vNormal = gl_Normal;
worldPosition = (mWorld * gl_Vertex).xyz;
vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
lightVec = sunPosition - worldPosition;
eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
vIDiff = directional_ambient(normalize(gl_Normal));
gl_FrontColor = gl_BackColor = gl_Color;
}

2
src/client/client.cpp
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@ -1860,7 +1860,7 @@ ITextureSource* Client::getTextureSource()
{
return m_tsrc;
}
IShaderSource* Client::getShaderSource()
IWritableShaderSource* Client::getShaderSource()
{
return m_shsrc;
}

2
src/client/client.h
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@ -367,7 +367,7 @@ public:
const NodeDefManager* getNodeDefManager() override;
ICraftDefManager* getCraftDefManager() override;
ITextureSource* getTextureSource();
virtual IShaderSource* getShaderSource();
virtual IWritableShaderSource* getShaderSource();
u16 allocateUnknownNodeId(const std::string &name) override;
virtual ISoundManager* getSoundManager();
MtEventManager* getEventManager();

57
src/client/clientenvironment.cpp
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@ -32,10 +32,65 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "raycast.h"
#include "voxelalgorithms.h"
#include "settings.h"
#include "shader.h"
#include "content_cao.h"
#include <algorithm>
#include "client/renderingengine.h"
/*
CAOShaderConstantSetter
*/
//! Shader constant setter for passing material emissive color to the CAO object_shader
class CAOShaderConstantSetter : public IShaderConstantSetter
{
public:
CAOShaderConstantSetter():
m_emissive_color_setting("emissiveColor")
{}
~CAOShaderConstantSetter() override = default;
void onSetConstants(video::IMaterialRendererServices *services,
bool is_highlevel) override
{
if (!is_highlevel)
return;
// Ambient color
video::SColorf emissive_color(m_emissive_color);
float as_array[4] = {
emissive_color.r,
emissive_color.g,
emissive_color.b,
emissive_color.a,
};
m_emissive_color_setting.set(as_array, services);
}
void onSetMaterial(const video::SMaterial& material) override
{
m_emissive_color = material.EmissiveColor;
}
private:
video::SColor m_emissive_color;
CachedPixelShaderSetting<float, 4> m_emissive_color_setting;
};
class CAOShaderConstantSetterFactory : public IShaderConstantSetterFactory
{
public:
CAOShaderConstantSetterFactory()
{}
virtual IShaderConstantSetter* create()
{
return new CAOShaderConstantSetter();
}
};
/*
ClientEnvironment
*/
@ -47,6 +102,8 @@ ClientEnvironment::ClientEnvironment(ClientMap *map,
m_texturesource(texturesource),
m_client(client)
{
auto *shdrsrc = m_client->getShaderSource();
shdrsrc->addShaderConstantSetterFactory(new CAOShaderConstantSetterFactory());
}
ClientEnvironment::~ClientEnvironment()

129
src/client/content_cao.cpp
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@ -46,6 +46,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "wieldmesh.h"
#include <algorithm>
#include <cmath>
#include "client/shader.h"
class Settings;
struct ToolCapabilities;
@ -352,6 +353,8 @@ void GenericCAO::initialize(const std::string &data)
player->setCAO(this);
}
}
m_enable_shaders = g_settings->getBool("enable_shaders");
}
void GenericCAO::processInitData(const std::string &data)
@ -577,8 +580,17 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
return;
}
video::E_MATERIAL_TYPE material_type = (m_prop.use_texture_alpha) ?
video::EMT_TRANSPARENT_ALPHA_CHANNEL : video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
if (m_enable_shaders) {
IShaderSource *shader_source = m_client->getShaderSource();
u32 shader_id = shader_source->getShader(
"object_shader",
TILE_MATERIAL_BASIC,
NDT_NORMAL);
m_material_type = shader_source->getShaderInfo(shader_id).material;
} else {
m_material_type = (m_prop.use_texture_alpha) ?
video::EMT_TRANSPARENT_ALPHA_CHANNEL : video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
}
auto grabMatrixNode = [this] {
infostream << "GenericCAO::addToScene(): " << m_prop.visual << std::endl;
@ -587,6 +599,18 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
m_matrixnode->grab();
};
auto setSceneNodeMaterial = [this] (scene::ISceneNode *node) {
node->setMaterialFlag(video::EMF_LIGHTING, false);
node->setMaterialFlag(video::EMF_BILINEAR_FILTER, false);
node->setMaterialFlag(video::EMF_FOG_ENABLE, true);
node->setMaterialType(m_material_type);
if (m_enable_shaders) {
node->setMaterialFlag(video::EMF_GOURAUD_SHADING, false);
node->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, true);
}
};
if (m_prop.visual == "sprite") {
grabMatrixNode();
m_spritenode = RenderingEngine::get_scene_manager()->addBillboardSceneNode(
@ -594,10 +618,9 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
m_spritenode->grab();
m_spritenode->setMaterialTexture(0,
tsrc->getTextureForMesh("unknown_node.png"));
m_spritenode->setMaterialFlag(video::EMF_LIGHTING, false);
m_spritenode->setMaterialFlag(video::EMF_BILINEAR_FILTER, false);
m_spritenode->setMaterialType(material_type);
m_spritenode->setMaterialFlag(video::EMF_FOG_ENABLE, true);
setSceneNodeMaterial(m_spritenode);
u8 li = m_last_light;
m_spritenode->setColor(video::SColor(255,li,li,li));
m_spritenode->setSize(v2f(m_prop.visual_size.X,
@ -619,10 +642,10 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
{ // Front
scene::IMeshBuffer *buf = new scene::SMeshBuffer();
video::S3DVertex vertices[4] = {
video::S3DVertex(-dx, -dy, 0, 0,0,0, c, 1,1),
video::S3DVertex( dx, -dy, 0, 0,0,0, c, 0,1),
video::S3DVertex( dx, dy, 0, 0,0,0, c, 0,0),
video::S3DVertex(-dx, dy, 0, 0,0,0, c, 1,0),
video::S3DVertex(-dx, -dy, 0, 0,0,1, c, 1,1),
video::S3DVertex( dx, -dy, 0, 0,0,1, c, 0,1),
video::S3DVertex( dx, dy, 0, 0,0,1, c, 0,0),
video::S3DVertex(-dx, dy, 0, 0,0,1, c, 1,0),
};
if (m_is_player) {
// Move minimal Y position to 0 (feet position)
@ -635,7 +658,14 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
buf->getMaterial().MaterialType = m_material_type;
if (m_enable_shaders) {
buf->getMaterial().EmissiveColor = c;
buf->getMaterial().setFlag(video::EMF_GOURAUD_SHADING, false);
buf->getMaterial().setFlag(video::EMF_NORMALIZE_NORMALS, true);
}
// Add to mesh
mesh->addMeshBuffer(buf);
buf->drop();
@ -643,10 +673,10 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
{ // Back
scene::IMeshBuffer *buf = new scene::SMeshBuffer();
video::S3DVertex vertices[4] = {
video::S3DVertex( dx,-dy, 0, 0,0,0, c, 1,1),
video::S3DVertex(-dx,-dy, 0, 0,0,0, c, 0,1),
video::S3DVertex(-dx, dy, 0, 0,0,0, c, 0,0),
video::S3DVertex( dx, dy, 0, 0,0,0, c, 1,0),
video::S3DVertex( dx,-dy, 0, 0,0,-1, c, 1,1),
video::S3DVertex(-dx,-dy, 0, 0,0,-1, c, 0,1),
video::S3DVertex(-dx, dy, 0, 0,0,-1, c, 0,0),
video::S3DVertex( dx, dy, 0, 0,0,-1, c, 1,0),
};
if (m_is_player) {
// Move minimal Y position to 0 (feet position)
@ -659,7 +689,14 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
buf->getMaterial().MaterialType = m_material_type;
if (m_enable_shaders) {
buf->getMaterial().EmissiveColor = c;
buf->getMaterial().setFlag(video::EMF_GOURAUD_SHADING, false);
buf->getMaterial().setFlag(video::EMF_NORMALIZE_NORMALS, true);
}
// Add to mesh
mesh->addMeshBuffer(buf);
buf->drop();
@ -683,10 +720,7 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
u8 li = m_last_light;
setMeshColor(m_meshnode->getMesh(), video::SColor(255,li,li,li));
m_meshnode->setMaterialFlag(video::EMF_LIGHTING, false);
m_meshnode->setMaterialFlag(video::EMF_BILINEAR_FILTER, false);
m_meshnode->setMaterialType(material_type);
m_meshnode->setMaterialFlag(video::EMF_FOG_ENABLE, true);
setSceneNodeMaterial(m_meshnode);
} else if (m_prop.visual == "mesh") {
grabMatrixNode();
scene::IAnimatedMesh *mesh = m_client->getMesh(m_prop.mesh, true);
@ -704,10 +738,8 @@ void GenericCAO::addToScene(ITextureSource *tsrc)
setAnimatedMeshColor(m_animated_meshnode, video::SColor(255,li,li,li));
m_animated_meshnode->setMaterialFlag(video::EMF_LIGHTING, true);
m_animated_meshnode->setMaterialFlag(video::EMF_BILINEAR_FILTER, false);
m_animated_meshnode->setMaterialType(material_type);
m_animated_meshnode->setMaterialFlag(video::EMF_FOG_ENABLE, true);
setSceneNodeMaterial(m_animated_meshnode);
m_animated_meshnode->setMaterialFlag(video::EMF_BACK_FACE_CULLING,
m_prop.backface_culling);
} else
@ -789,17 +821,41 @@ void GenericCAO::updateLightNoCheck(u8 light_at_pos)
return;
u8 li = decode_light(light_at_pos + m_glow);
if (li != m_last_light) {
m_last_light = li;
video::SColor color(255,li,li,li);
if (m_meshnode) {
setMeshColor(m_meshnode->getMesh(), color);
} else if (m_animated_meshnode) {
setAnimatedMeshColor(m_animated_meshnode, color);
} else if (m_wield_meshnode) {
m_wield_meshnode->setColor(color);
} else if (m_spritenode) {
m_spritenode->setColor(color);
if (m_enable_shaders) {
scene::ISceneNode *node = getSceneNode();
if (node == nullptr) {
return;
}
if (m_prop.visual == "upright_sprite") {
scene::IMesh *mesh = m_meshnode->getMesh();
for (u32 i = 0; i < mesh->getMeshBufferCount(); ++i) {
scene::IMeshBuffer* buf = mesh->getMeshBuffer(i);
video::SMaterial& material = buf->getMaterial();
material.EmissiveColor = color;
}
} else {
for (u32 i = 0; i < node->getMaterialCount(); ++i) {
video::SMaterial& material = node->getMaterial(i);
material.EmissiveColor = color;
}
}
} else {
if (m_meshnode) {
setMeshColor(m_meshnode->getMesh(), color);
} else if (m_animated_meshnode) {
setAnimatedMeshColor(m_animated_meshnode, color);
} else if (m_wield_meshnode) {
m_wield_meshnode->setColor(color);
} else if (m_spritenode) {
m_spritenode->setColor(color);
}
}
}
}
@ -1101,16 +1157,13 @@ void GenericCAO::updateTextures(std::string mod)
m_current_texture_modifier = mod;
m_glow = m_prop.glow;
video::E_MATERIAL_TYPE material_type = (m_prop.use_texture_alpha) ?
video::EMT_TRANSPARENT_ALPHA_CHANNEL : video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
if (m_spritenode) {
if (m_prop.visual == "sprite") {
std::string texturestring = "unknown_node.png";
if (!m_prop.textures.empty())
texturestring = m_prop.textures[0];
texturestring += mod;
m_spritenode->getMaterial(0).MaterialType = material_type;
m_spritenode->getMaterial(0).MaterialType = m_material_type;
m_spritenode->getMaterial(0).MaterialTypeParam = 0.5f;
m_spritenode->setMaterialTexture(0,
tsrc->getTextureForMesh(texturestring));
@ -1146,7 +1199,7 @@ void GenericCAO::updateTextures(std::string mod)
// Set material flags and texture
video::SMaterial& material = m_animated_meshnode->getMaterial(i);
material.MaterialType = material_type;
material.MaterialType = m_material_type;
material.MaterialTypeParam = 0.5f;
material.TextureLayer[0].Texture = texture;
material.setFlag(video::EMF_LIGHTING, true);
@ -1193,7 +1246,7 @@ void GenericCAO::updateTextures(std::string mod)
// Set material flags and texture
video::SMaterial& material = m_meshnode->getMaterial(i);
material.MaterialType = material_type;
material.MaterialType = m_material_type;
material.MaterialTypeParam = 0.5f;
material.setFlag(video::EMF_LIGHTING, false);
material.setFlag(video::EMF_BILINEAR_FILTER, false);

4
src/client/content_cao.h
View File

@ -125,6 +125,10 @@ private:
u8 m_last_light = 255;
bool m_is_visible = false;
s8 m_glow = 0;
// Material
video::E_MATERIAL_TYPE m_material_type;
// Settings
bool m_enable_shaders = false;
public:
GenericCAO(Client *client, ClientEnvironment *env);

8
src/client/shader.cpp
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@ -188,7 +188,7 @@ public:
delete setter;
}
virtual void OnSetConstants(video::IMaterialRendererServices *services, s32 userData)
virtual void OnSetConstants(video::IMaterialRendererServices *services, s32 userData) override
{
video::IVideoDriver *driver = services->getVideoDriver();
sanity_check(driver != NULL);
@ -198,6 +198,12 @@ public:
for (IShaderConstantSetter *setter : m_setters)
setter->onSetConstants(services, is_highlevel);
}
virtual void OnSetMaterial(const video::SMaterial& material) override
{
for (IShaderConstantSetter *setter : m_setters)
setter->onSetMaterial(material);
}
};

2
src/client/shader.h
View File

@ -67,6 +67,8 @@ public:
virtual ~IShaderConstantSetter() = default;
virtual void onSetConstants(video::IMaterialRendererServices *services,
bool is_highlevel) = 0;
virtual void onSetMaterial(const video::SMaterial& material)
{ }
};