public GeometryShader()
{
ShaderBuilder vert = new ShaderBuilder(ShaderType.VertexShader, false);
vert.AddUniform(ShaderVarType.Mat4, "view_matrix");
vert.AddAttribute(ShaderVarType.Vec3, "in_position");
vert.AddAttribute(ShaderVarType.Vec2, "in_tex");
vert.AddVarying(ShaderVarType.Float, "var_shade");
vert.AddVarying(ShaderVarType.Vec3, "var_tex");
vert.Logic = @"
float roots[ 4 ] = float[](
0.0,
1.0,
0.70710678118654752440084436210485,
0.57735026918962576450914878050196
);
vec3 sun_dir = normalize( vec3( 0.6, -0.7, 0.4 ) );
void main( void )
{
int faceData = int( in_tex.x / 289 );
int texPosIndex = int( in_tex.x ) % 289;
float size = float( faceData / 27 );
int face = faceData % 27;
vec3 norm = normalize( vec3( face % 3 - 1, ( face / 3 ) % 3 - 1, ( face / 9 ) % 3 - 1 ) );
var_shade = dot( norm, sun_dir ) * 0.25 + 0.75;
vec2 texPos = vec2( texPosIndex % 17, texPosIndex / 17 );
var_tex = vec3( texPos / 16.0 * size, in_tex.y );
gl_Position = view_matrix * vec4( in_position, 1.0 );
}
";
ShaderBuilder frag = new ShaderBuilder(ShaderType.FragmentShader, false);
frag.AddUniform(ShaderVarType.Sampler2DArray, "tilemap");
frag.AddVarying(ShaderVarType.Float, "var_shade");
frag.AddVarying(ShaderVarType.Vec3, "var_tex");
frag.Logic = @"
void main( void )
{
out_frag_colour = texture2DArray( tilemap, var_tex ) * vec4( var_shade, var_shade, var_shade, 1.0 );
}
";
VertexSource = vert.Generate(GL3);
FragmentSource = frag.Generate(GL3);
BeginMode = BeginMode.Triangles;
CameraPosition = new Vector3();
CameraRotation = new Vector2();
}
public SpriteShader()
{
ShaderBuilder vert = new ShaderBuilder(ShaderType.VertexShader, true);
vert.AddAttribute(ShaderVarType.Vec2, "in_position");
vert.AddAttribute(ShaderVarType.Vec2, "in_texture");
vert.AddAttribute(ShaderVarType.Vec4, "in_colour");
vert.AddVarying(ShaderVarType.Vec2, "var_texture");
vert.AddVarying(ShaderVarType.Vec4, "var_colour");
vert.Logic = @"
void main( void )
{
var_texture = in_texture;
var_colour = in_colour;
gl_Position = in_position;
}
";
ShaderBuilder frag = new ShaderBuilder(ShaderType.FragmentShader, true);
frag.AddUniform(ShaderVarType.Sampler2D, "texture0");
frag.AddVarying(ShaderVarType.Vec2, "var_texture");
frag.AddVarying(ShaderVarType.Vec4, "var_colour");
frag.Logic = @"
void main( void )
{
vec4 clr = texture2D( texture0, var_texture ) * var_colour;
if( clr.a != 0.0 )
out_frag_colour = vec4( clr.rgba );
else
discard;
}
";
VertexSource = vert.Generate(GL3);
FragmentSource = frag.Generate(GL3);
BeginMode = BeginMode.Quads;
}
public SpriteShader()
{
ShaderBuilder vert = new ShaderBuilder( ShaderType.VertexShader, true );
vert.AddAttribute( ShaderVarType.Vec2, "in_position" );
vert.AddAttribute( ShaderVarType.Vec2, "in_texture" );
vert.AddAttribute( ShaderVarType.Vec4, "in_colour" );
vert.AddVarying( ShaderVarType.Vec2, "var_texture" );
vert.AddVarying( ShaderVarType.Vec4, "var_colour" );
vert.Logic = @"
void main( void )
{
var_texture = in_texture;
var_colour = in_colour;
gl_Position = in_position;
}
";
ShaderBuilder frag = new ShaderBuilder( ShaderType.FragmentShader, true );
frag.AddUniform( ShaderVarType.Sampler2D, "texture0" );
frag.AddVarying( ShaderVarType.Vec2, "var_texture" );
frag.AddVarying( ShaderVarType.Vec4, "var_colour" );
frag.Logic = @"
void main( void )
{
vec4 clr = texture2D( texture0, var_texture ) * var_colour;
if( clr.a != 0.0 )
out_frag_colour = vec4( clr.rgba );
else
discard;
}
";
VertexSource = vert.Generate( GL3 );
FragmentSource = frag.Generate( GL3 );
BeginMode = BeginMode.Quads;
}
