#include <cmath>
#include <cstdlib>
+#include "camera.h"
#include "light.h"
#include "matrix.h"
#include "misc.h"
depth_buf.set_wrap(CLAMP_TO_EDGE);
depth_buf.storage(DEPTH_COMPONENT, size, size);
fbo.attach(DEPTH_ATTACHMENT, depth_buf, 0);
+ fbo.require_complete();
set_darkness(0.7);
- set_texture_unit(3);
}
void ShadowMap::set_target(const Vector3 &t, float r)
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::setup_frame() const
{
if(rendered)
renderable.setup_frame();
rendered = true;
- Vector4 lpos = light.get_position();
-
+ const Vector4 &lpos = light.get_position();
+ Vector3 back;
if(lpos.w)
{
/* XXX Not really proper way to support positional lights, but good
enough when the light source is far away */
- lpos.x -= target.x;
- lpos.y -= target.y;
- lpos.z -= target.z;
- }
-
- float l = sqrt(lpos.x*lpos.x+lpos.y*lpos.y+lpos.z*lpos.z);
- lpos.x /= l;
- lpos.y /= l;
- lpos.z /= l;
-
- float matrix[16];
- if(abs(lpos.z)>=abs(lpos.x) && abs(lpos.z)>=abs(lpos.y))
- {
- float d = sqrt(lpos.x*lpos.x+lpos.z*lpos.z);
- matrix[0] = lpos.z/d;
- matrix[4] = 0;
- matrix[8] = -lpos.x/d;
- matrix[1] = -lpos.x*lpos.y/d;
- matrix[5] = d;
- matrix[9] = -lpos.z*lpos.y/d;
+ back = Vector3(lpos)-target;
}
else
- {
- float d = sqrt(lpos.x*lpos.x+lpos.y*lpos.y);
- matrix[0] = -lpos.y/d;
- matrix[4] = lpos.x/d;
- matrix[8] = 0;
- matrix[1] = -lpos.x*lpos.z/d;
- matrix[5] = -lpos.y*lpos.z/d;
- matrix[9] = d;
- }
+ back = Vector3(lpos);
+ back.normalize();
- matrix[2] = lpos.x;
- matrix[6] = lpos.y;
- matrix[10] = lpos.z;
+ Vector3 up;
+ if(abs(back.z)<0.99)
+ up = Vector3(0, 0, 1);
+ else
+ up = Vector3(0, 1, 0);
- matrix[12] = -(target.x*matrix[0]+target.y*matrix[4]+target.z*matrix[8]);
- matrix[13] = -(target.x*matrix[1]+target.y*matrix[5]+target.z*matrix[9]);
- matrix[14] = -(target.x*matrix[2]+target.y*matrix[6]+target.z*matrix[10]);
- matrix[3] = 0;
- matrix[7] = 0;
- matrix[11] = 0;
- matrix[15] = 1;
+ Vector3 right = normalize(cross(up, back));
- light_matrix = matrix;
+ Vector4 columns[4];
+ columns[0] = Vector4(right, 0.0f);
+ columns[1] = Vector4(normalize(cross(back, right)), 0.0f);
+ columns[2] = Vector4(back, 0.0f);
+ columns[3] = Vector4(target, 1.0f);
+ light_matrix = Matrix::from_columns(columns);
+ view_matrix = invert(light_matrix);
MatrixStack::Push push_mv(MatrixStack::modelview());
MatrixStack::Push push_proj(MatrixStack::projection());
MatrixStack::projection() = Matrix::ortho(-radius, radius, -radius, radius, -radius, radius);
- MatrixStack::modelview() = light_matrix;
+ MatrixStack::modelview() = view_matrix;
+
+ shadow_matrix = light_matrix;
+ shadow_matrix.scale(radius*2, radius*2, -radius*2);
+ shadow_matrix.translate(-0.5, -0.5, depth_bias/size-0.5);
+ shadow_matrix.invert();
- Bind bind_fbo(fbo, true);
+ BindRestore bind_fbo(fbo);
Bind bind_depth(DepthTest::lequal());
fbo.clear(DEPTH_BUFFER_BIT);
renderable.render("shadow");
if(!enabled_passes.count(tag))
return renderer.render(renderable, tag);
- const double *matrix = light_matrix.data();
+ Renderer::Push _push_rend(renderer);
+
+ unsigned unit = renderer.allocate_effect_texunit();
+ int iunit = unit;
+ shdata.uniform("shadow", iunit);
+ shdata.uniform("shadow_unit", iunit);
- // Has side effect of changing the current unit
depth_buf.bind_to(unit);
- float diam = radius*2;
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-depth_bias/size));
- tg_s.bind_to(SCOORD);
- tg_t.bind_to(TCOORD);
- tg_r.bind_to(RCOORD);
- TexUnit::activate(0);
+ tg_s.set_plane(Vector4(shadow_matrix(0, 0), shadow_matrix(0, 1), shadow_matrix(0, 2), shadow_matrix(0, 3)));
+ tg_t.set_plane(Vector4(shadow_matrix(1, 0), shadow_matrix(1, 1), shadow_matrix(1, 2), shadow_matrix(1, 3)));
+ tg_r.set_plane(Vector4(shadow_matrix(2, 0), shadow_matrix(2, 1), shadow_matrix(2, 2), shadow_matrix(2, 3)));
+ tg_s.bind_to(unit, SCOORD);
+ tg_t.bind_to(unit, TCOORD);
+ tg_r.bind_to(unit, RCOORD);
+
+ if(const Camera *camera = renderer.get_camera())
+ /* Multiply by camera's object matrix to form a matrix that transforms
+ from eye space to shadow space. */
+ shdata.uniform("shd_eye_matrix", shadow_matrix*camera->get_object_matrix());
+ else
+ shdata.uniform("shd_eye_matrix", shadow_matrix);
- Renderer::Push _push_rend(renderer);
renderer.add_shader_data(shdata);
renderer.render(renderable, tag);
Texture::unbind_from(unit);
- TexGen::unbind_from(SCOORD);
- TexGen::unbind_from(TCOORD);
- TexGen::unbind_from(RCOORD);
- TexUnit::activate(0);
+ TexGen::unbind_from(unit, SCOORD);
+ TexGen::unbind_from(unit, TCOORD);
+ TexGen::unbind_from(unit, RCOORD);
}
} // namespace GL
projects / libs / gl.git / blobdiff