Improvements for shadow mapping

[libs/gl.git] / source / shadowmap.cpp

diff --git a/source/shadowmap.cpp b/source/shadowmap.cpp
index a9edacfc3f9282ca6c1128d351c21712922494c7..b930315f626140d43c461910a8c8bfc01fdfd580 100644 (file)
--- a/source/shadowmap.cpp
+++ b/source/shadowmap.cpp
@@ -18,8 +18,8 @@ ShadowMap::ShadowMap(unsigned s, const Renderable &r, const Light &l):
        Effect(r),
        size(s),
        light(l),
-       unit(3),
-       radius(1)
+       radius(1),
+       depth_bias(4)
 {
        depth_buf.set_min_filter(LINEAR);
        depth_buf.set_compare_enabled(true);
@@ -27,6 +27,9 @@ ShadowMap::ShadowMap(unsigned s, const Renderable &r, const Light &l):
        depth_buf.set_wrap(CLAMP_TO_EDGE);
        depth_buf.storage(DEPTH_COMPONENT, size, size);
        fbo.attach(DEPTH_ATTACHMENT, depth_buf, 0);
+
+       set_darkness(0.7);
+       set_texture_unit(3);
 }
 
 void ShadowMap::set_target(const Vector3 &t, float r)
@@ -35,15 +38,35 @@ void ShadowMap::set_target(const Vector3 &t, float r)
        radius = r;
 }
 
+void ShadowMap::set_darkness(float d)
+{
+       if(d<0.0f || d>1.0f)
+               throw invalid_argument("ShadowMap::set_darkness");
+
+       shdata.uniform("shadow_darkness", d);
+}
+
+void ShadowMap::set_depth_bias(float b)
+{
+       if(b<0.0f)
+               throw invalid_argument("ShadowMap::set_depth_bias");
+
+       depth_bias = b;
+}
+
 void ShadowMap::set_texture_unit(unsigned u)
 {
        unit = u;
+
+       int i = unit;
+       shdata.uniform("shadow", i);
+       shdata.uniform("shadow_unit", i);
 }
 
 void ShadowMap::render(Renderer &renderer, const Tag &tag) const
 {
        if(!enabled_passes.count(tag))
-               return renderable.render(renderer, tag);
+               return renderer.render(renderable, tag);
 
        Vector4 lpos = light.get_position();
        if(lpos.w)
@@ -113,13 +136,15 @@ void ShadowMap::render(Renderer &renderer, const Tag &tag) const
        TexGen tg_s, tg_t, tg_r;
        tg_s.set_plane(Vector4(matrix[0]/diam, matrix[4]/diam, matrix[8]/diam, matrix[12]/diam+0.5f));
        tg_t.set_plane(Vector4(matrix[1]/diam, matrix[5]/diam, matrix[9]/diam, matrix[13]/diam+0.5f));
-       tg_r.set_plane(Vector4(-matrix[2]/diam, -matrix[6]/diam, -matrix[10]/diam, 0.5f-matrix[14]/diam-4.0f/size));
+       tg_r.set_plane(Vector4(-matrix[2]/diam, -matrix[6]/diam, -matrix[10]/diam, 0.5f-matrix[14]/diam-depth_bias/size));
        tg_s.bind_to(SCOORD);
        tg_t.bind_to(TCOORD);
        tg_r.bind_to(RCOORD);
        TexUnit::activate(0);
 
-       renderable.render(renderer, tag);
+       Renderer::Push _push_rend(renderer);
+       renderer.add_shader_data(shdata);
+       renderer.render(renderable, tag);
 
        Texture::unbind_from(unit);
        TexGen::unbind_from(SCOORD);