public ShaderManager()
{
var staticMeshVsh = new ShaderStage(ShaderType.VertexShader, "shaders/static_mesh.vsh");
var staticMeshFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/static_mesh.fsh");
// Color mult prog
staticMeshShader = new UnlitTintedShaderDescription(staticMeshVsh, staticMeshFsh);
// Room prog
var roomFragmentShader = new ShaderStage(ShaderType.FragmentShader, "shaders/room.fsh");
for (var isWater = 0; isWater < 2; isWater++)
{
for (var isFlicker = 0; isFlicker < 2; isFlicker++)
{
var stream =
"#define IS_WATER " + isWater + "\n" +
"#define IS_FLICKER " + isFlicker + "\n";
var roomVsh = new ShaderStage(ShaderType.VertexShader, "shaders/room.vsh", stream);
roomShaders[isWater][isFlicker] = new UnlitTintedShaderDescription(roomVsh, roomFragmentShader);
}
}
// Entity prog
var entityVertexShader = new ShaderStage(ShaderType.VertexShader, "shaders/entity.vsh");
var entitySkinVertexShader = new ShaderStage(ShaderType.VertexShader, "shaders/entity_skin.vsh");
for (var i = 0; i < MAX_NUM_LIGHTS; i++)
{
var stream = "#define NUMBER_OF_LIGHTS " + i + "\n";
var fragment = new ShaderStage(ShaderType.FragmentShader, "shaders/entity.fsh", stream);
entityShader[i][0] = new LitShaderDescription(entityVertexShader, fragment);
entityShader[i][1] = new LitShaderDescription(entitySkinVertexShader, fragment);
}
// GUI prog
var guiVertexShader = new ShaderStage(ShaderType.VertexShader, "shaders/gui.vsh");
var guiFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/gui.fsh");
gui = new GuiShaderDescription(guiVertexShader, guiFsh);
var guiTexFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/gui_tex.fsh");
guiTextured = new GuiShaderDescription(guiVertexShader, guiTexFsh);
var textVsh = new ShaderStage(ShaderType.VertexShader, "shaders/text.vsh");
var textFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/text.fsh");
text = new TextShaderDescription(textVsh, textFsh);
var spriteVsh = new ShaderStage(ShaderType.VertexShader, "shaders/sprite.vsh");
var spriteFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/sprite.fsh");
sprites = new SpriteShaderDescription(spriteVsh, spriteFsh);
var stencilVsh = new ShaderStage(ShaderType.VertexShader, "shaders/stencil.vsh");
var stencilFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/stencil.fsh");
stencil = new LitShaderDescription(stencilVsh, stencilFsh);
var debugVsh = new ShaderStage(ShaderType.VertexShader, "shaders/debuglines.vsh");
var debugFsh = new ShaderStage(ShaderType.FragmentShader, "shaders/debuglines.fsh");
debugLine = new UnlitTintedShaderDescription(debugVsh, debugFsh);
}
public void RenderBSPBackToFront(BlendingMode currentTransparency, BSPNode root,
UnlitTintedShaderDescription shader)
{
var d = root.Plane.Distance(EngineCamera.Position);
if (d >= 0)
{
if (root.Back != null)
{
RenderBSPBackToFront(currentTransparency, root.Back, shader);
}
foreach (var p in root.PolygonsBack)
{
RenderPolygonTransparency(currentTransparency, p, shader);
}
foreach (var p in root.PolygonsFront)
{
RenderPolygonTransparency(currentTransparency, p, shader);
}
if (root.Front != null)
{
RenderBSPBackToFront(currentTransparency, root.Front, shader);
}
}
else
{
if (root.Front != null)
{
RenderBSPBackToFront(currentTransparency, root.Front, shader);
}
foreach (var p in root.PolygonsFront)
{
RenderPolygonTransparency(currentTransparency, p, shader);
}
foreach (var p in root.PolygonsBack)
{
RenderPolygonTransparency(currentTransparency, p, shader);
}
if (root.Back != null)
{
RenderBSPBackToFront(currentTransparency, root.Back, shader);
}
}
}
public void RenderPolygonTransparency(BlendingMode currentTransparency, BSPFaceRef bspRef,
UnlitTintedShaderDescription shader)
{
// Blending mode switcher.
// Note that modes above 2 aren't explicitly used in TR textures, only for
// internal particle processing. Theoretically it's still possible to use
// them if you will force type via TRTextur utility.
var refe = bspRef.Polygon;
var p = refe.Polygon;
if(currentTransparency != p.BlendMode)
{
currentTransparency = p.BlendMode;
switch (p.BlendMode)
{
case BlendingMode.Multiply: // Classic PC alpha
GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.One);
break;
case BlendingMode.InvertSrc: // Inversion by src (PS darkness) - SAME AS IN TR3-TR5
GL.BlendFunc(BlendingFactorSrc.Zero, BlendingFactorDest.OneMinusSrcAlpha);
break;
case BlendingMode.InvertDst: // Inversion by dest
GL.BlendFunc(BlendingFactorSrc.OneMinusSrcColor, BlendingFactorDest.OneMinusSrcAlpha);
break;
case BlendingMode.Screen: // Screen (smoke, etc.)
GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.OneMinusSrcAlpha);
break;
case BlendingMode.AnimatedTexture:
GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.Zero);
break;
}
}
var mvp = Camera.GLViewProjMat.MultiplyByTransform(bspRef.Transform);
GL.UniformMatrix4(shader.ModelViewProjection, false, ref mvp);
refe.UsedVertexArray.Bind();
GL.BindTexture(TextureTarget.Texture2D, World.Textures[p.TexIndex]);
GL.DrawElements(PrimitiveType.Triangles, (int)refe.Count, DrawElementsType.UnsignedInt, (int)(sizeof(uint) * refe.FirstIndex));
}