public ModelShader()
{
ShaderBuilder vert = new ShaderBuilder( ShaderType.VertexShader, false );
vert.AddUniform( ShaderVarType.Mat4, "view_matrix" );
vert.AddUniform( ShaderVarType.Vec3, "model_pos" );
vert.AddUniform( ShaderVarType.Vec4, "model_rot" );
vert.AddUniform( ShaderVarType.Vec4, "colour" );
vert.AddUniform( ShaderVarType.Float, "fog_density" );
vert.AddAttribute( ShaderVarType.Vec3, "in_position" );
vert.AddAttribute( ShaderVarType.Vec2, "in_texcoord" );
vert.AddAttribute( ShaderVarType.Vec4, "in_colour" );
vert.AddVarying( ShaderVarType.Vec2, "var_texcoord" );
vert.AddVarying( ShaderVarType.Vec4, "var_colour" );
vert.AddVarying( ShaderVarType.Float, "var_fogfactor" );
vert.Logic = @"
vec3 qtransform( vec4 q, vec3 v )
{
return v + 2.0 * cross( cross( v, q.xyz ) + q.w * v, q.xyz );
}
void main( void )
{
gl_Position = view_matrix * vec4( qtransform( model_rot, in_position ) + model_pos, 1 );
var_texcoord = in_texcoord;
var_colour = colour * in_colour;
const float LOG2 = 1.442695;
float dist = length( gl_Position );
var_fogfactor = exp2( - fog_density * fog_density * dist * dist * LOG2 );
var_fogfactor = clamp( var_fogfactor, 0.0, 1.0 );
}
";
ShaderBuilder frag = new ShaderBuilder( ShaderType.FragmentShader, false );
frag.AddUniform( ShaderVarType.Sampler2D, "tex_diffuse" );
frag.AddUniform( ShaderVarType.Sampler2D, "tex_mask" );
frag.AddUniform( ShaderVarType.Bool, "flag_mask" );
frag.AddUniform( ShaderVarType.Vec3, "fog_colour" );
frag.AddVarying( ShaderVarType.Vec2, "var_texcoord" );
frag.AddVarying( ShaderVarType.Vec4, "var_colour" );
frag.AddVarying( ShaderVarType.Float, "var_fogfactor" );
frag.Logic = @"
void main( void )
{
if( var_colour.a == 0.0 || var_fogfactor == 1.0 )
discard;
vec4 clr = texture2D( tex_diffuse, var_texcoord );
if( clr.a < 0.5 )
discard;
if( flag_mask && texture2D( tex_mask, var_texcoord ).a < 0.5 )
discard;
out_frag_colour = vec4( mix( fog_colour, clr.rgb * var_colour.rgb, var_fogfactor ), clr.a * var_colour.a );
}
";
VertexSource = vert.Generate( GL3 );
FragmentSource = frag.Generate( GL3 );
BeginMode = BeginMode.TriangleStrip;
myColour = Color4.White;
myAlphaMask = false;
myBackfaceCulling = false;
Create();
}
public ModelShader()
{
ShaderBuilder vert = new ShaderBuilder(ShaderType.VertexShader, false);
vert.AddUniform(ShaderVarType.Mat4, "view_matrix");
vert.AddUniform(ShaderVarType.Vec3, "model_pos");
vert.AddUniform(ShaderVarType.Vec4, "model_rot");
vert.AddUniform(ShaderVarType.Vec4, "colour");
vert.AddUniform(ShaderVarType.Float, "fog_density");
vert.AddAttribute(ShaderVarType.Vec3, "in_position");
vert.AddAttribute(ShaderVarType.Vec2, "in_texcoord");
vert.AddAttribute(ShaderVarType.Vec4, "in_colour");
vert.AddVarying(ShaderVarType.Vec2, "var_texcoord");
vert.AddVarying(ShaderVarType.Vec4, "var_colour");
vert.AddVarying(ShaderVarType.Float, "var_fogfactor");
vert.Logic = @"
vec3 qtransform( vec4 q, vec3 v )
{
return v + 2.0 * cross( cross( v, q.xyz ) + q.w * v, q.xyz );
}
void main( void )
{
gl_Position = view_matrix * vec4( qtransform( model_rot, in_position ) + model_pos, 1 );
var_texcoord = in_texcoord;
var_colour = colour * in_colour;
const float LOG2 = 1.442695;
float dist = length( gl_Position );
var_fogfactor = exp2( - fog_density * fog_density * dist * dist * LOG2 );
var_fogfactor = clamp( var_fogfactor, 0.0, 1.0 );
}
";
ShaderBuilder frag = new ShaderBuilder(ShaderType.FragmentShader, false);
frag.AddUniform(ShaderVarType.Sampler2D, "tex_diffuse");
frag.AddUniform(ShaderVarType.Sampler2D, "tex_mask");
frag.AddUniform(ShaderVarType.Bool, "flag_mask");
frag.AddUniform(ShaderVarType.Vec3, "fog_colour");
frag.AddVarying(ShaderVarType.Vec2, "var_texcoord");
frag.AddVarying(ShaderVarType.Vec4, "var_colour");
frag.AddVarying(ShaderVarType.Float, "var_fogfactor");
frag.Logic = @"
void main( void )
{
if( var_colour.a == 0.0 || var_fogfactor == 1.0 )
discard;
vec4 clr = texture2D( tex_diffuse, var_texcoord );
if( clr.a < 0.5 )
discard;
if( flag_mask && texture2D( tex_mask, var_texcoord ).a < 0.5 )
discard;
out_frag_colour = vec4( mix( fog_colour, clr.rgb * var_colour.rgb, var_fogfactor ), clr.a * var_colour.a );
}
";
VertexSource = vert.Generate(GL3);
FragmentSource = frag.Generate(GL3);
BeginMode = BeginMode.TriangleStrip;
myColour = Color4.White;
myAlphaMask = false;
myBackfaceCulling = false;
Create();
}
