/// <summary>
/// Loads vertex and fragment shaders from strings.
/// </summary>
/// <param name="sVertexShd_">The s vertex SHD_.</param>
/// <param name="sFragmentShd_">The s fragment SHD_.</param>
/// <returns>a new instance</returns>
public static Shader LoadFromStrings(string sVertexShd_, string sFragmentShd_)
{
Shader shd = new Shader();
shd.m_ProgramID = CreaterShader(sVertexShd_, sFragmentShd_);
if (!shd.IsLoaded())
{
shd = null;
}
return shd;
}
public Visual()
{
// Vertex positions
float[] positions =
{
1.0f, -1.0f,
1.0f, 1.0f,
-1.0f, -1.0f,
-1.0f, 1.0f
};
// Reserve a name for the buffer object.
bufferQuad = GL.GenBuffer();
// Bind it to the GL_ARRAY_BUFFER target.
GL.BindBuffer(BufferTarget.ArrayBuffer, bufferQuad);
// Allocate space for it (sizeof(positions)
GL.BufferData(BufferTarget.ArrayBuffer
, (IntPtr) (sizeof(float) * positions.Length), positions, BufferUsageHint.StaticDraw);
GL.BindVertexArray(bufferQuad);
GL.EnableClientState(ArrayCap.VertexArray);
GL.VertexPointer(2, VertexPointerType.Float, 0, 0);
GL.BindVertexArray(0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.Disable(EnableCap.DepthTest);
GL.ClearColor(1, 0, 0, 0);
surface = new GLTools.Texture(1, 1);
string sVertexShader = @"
varying vec2 uv;
void main() {
gl_Position = gl_Vertex;
uv = gl_Vertex.xy * 0.5f + 0.5f;
}";
string sFragmentShd = @"
varying vec2 uv;
uniform sampler2D tex;
void main() {
gl_FragColor = texture(tex, uv);
}";
shaderCopy = Shader.LoadFromStrings(sVertexShader, sFragmentShd);
loadShader("");
}
public void loadShader(string fileName)
{
string sVertexShader = @"
uniform vec2 iResolution;
varying vec2 uv;
out vec2 fragCoord;
void main() {
gl_Position = gl_Vertex;
uv = gl_Vertex.xy * 0.5f + 0.5f;
fragCoord = uv * iResolution;
}";
string sFragmentShd = @"
varying vec2 uv;
void main() {
vec2 uv10 = floor(uv * 10.0f);
if(1.0 > mod(uv10.x + uv10.y, 2.0f))
discard;
gl_FragColor = vec4(1, 1, 0, 0);
}";
if (File.Exists(fileName))
using (StreamReader sr = new StreamReader(fileName))
{
sFragmentShd = sr.ReadToEnd();
}
shader = Shader.LoadFromStrings(sVertexShader, sFragmentShd);
}
