X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fshadowmap.cpp;h=91c056fe147cc4c994100b5a1aa1e2ec8534c730;hb=fa5b232a16e11d7950e80764497f0167ec9e3b41;hp=5f66d8984279ce55f9cfc98fcf2298d34fa31337;hpb=98c810b6d2256aa65986bbde12c38917678121bb;p=libs%2Fgl.git

diff --git a/source/shadowmap.cpp b/source/shadowmap.cpp
index 5f66d898..91c056fe 100644
--- a/source/shadowmap.cpp
+++ b/source/shadowmap.cpp
@@ -1,18 +1,13 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2009  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <cmath>
 #include <cstdlib>
 #include "light.h"
 #include "matrix.h"
 #include "misc.h"
-#include "projection.h"
+#include "renderer.h"
 #include "scene.h"
 #include "shadowmap.h"
+#include "tests.h"
+#include "texgen.h"
 #include "texunit.h"
 
 using namespace std;
@@ -20,127 +15,157 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
-ShadowMap::ShadowMap(unsigned s, const Scene &c, const Light &l):
+ShadowMap::ShadowMap(unsigned s, const Renderable &r, const Light &l):
+	Effect(r),
 	size(s),
-	scene(c),
 	light(l),
-	unit(3),
-	radius(1)
+	radius(1),
+	depth_bias(4),
+	rendered(false)
 {
 	depth_buf.set_min_filter(LINEAR);
-	depth_buf.storage(DEPTH_COMPONENT, size, size, 0);
-	depth_buf.image(0, DEPTH_COMPONENT, UNSIGNED_BYTE, 0);
-	depth_buf.parameter(GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);
-	depth_buf.parameter(GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
-	depth_buf.parameter(GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
-	depth_buf.parameter(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-	depth_buf.parameter(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	depth_buf.set_compare_enabled(true);
+	depth_buf.set_compare_func(LEQUAL);
+	depth_buf.set_wrap(CLAMP_TO_EDGE);
+	depth_buf.storage(DEPTH_COMPONENT, size, size);
 	fbo.attach(DEPTH_ATTACHMENT, depth_buf, 0);
-	draw_buffer(NO_BUFFER);
-	Framebuffer::unbind();
-	Texture::unbind();
+	fbo.require_complete();
+
+	set_darkness(0.7);
+	set_texture_unit(3);
 }
 
 void ShadowMap::set_target(const Vector3 &t, float r)
 {
-	target=t;
-	radius=r;
+	target = t;
+	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;
+	unit = u;
+
+	int i = unit;
+	shdata.uniform("shadow", i);
+	shdata.uniform("shadow_unit", i);
 }
 
-void ShadowMap::prepare()
+void ShadowMap::setup_frame() const
 {
-	const Vector4 &lpos=light.get_position();
+	if(rendered)
+		return;
+
+	renderable.setup_frame();
+	rendered = true;
+
+	Vector4 lpos = light.get_position();
+
 	if(lpos.w)
-		throw Exception("Non-directional lights not supported at the moment");
+	{
+		/* XXX Not really proper way to support positional lights, but good
+		enough when the light source is far away */
+		lpos -= Vector4(target.x, target.y, target.z, 1.0f);
+	}
+
+	lpos.normalize();
 
 	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;
+		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;
 	}
 	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;
+		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;
 	}
 
-	matrix[2]=lpos.x;
-	matrix[6]=lpos.y;
-	matrix[10]=lpos.z;
+	matrix[2] = lpos.x;
+	matrix[6] = lpos.y;
+	matrix[10] = lpos.z;
 
-	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;
+	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;
 
-	{
-		matrix_mode(PROJECTION);
-		push_matrix();
-		load_identity();
-		ortho(-radius, radius, -radius, radius, -radius, radius);
-		matrix_mode(MODELVIEW);
-		push_matrix();
-		load_matrix(matrix);
-
-		const Framebuffer *old_fbo=Framebuffer::current();
-		fbo.bind();
-		clear(DEPTH_BUFFER_BIT);
-		scene.render("shadow");
-
-		matrix_mode(PROJECTION);
-		pop_matrix();
-		matrix_mode(MODELVIEW);
-		pop_matrix();
-		if(old_fbo)
-			old_fbo->bind();
-		else
-			Framebuffer::unbind();
-	}
+	light_matrix = matrix;
 
-	depth_buf.bind_to(unit);
-	float diam=radius*2;
-	float s_eq[4]={ matrix[0]/diam, matrix[4]/diam, matrix[8]/diam, matrix[12]/diam+0.5 };
-	float t_eq[4]={ matrix[1]/diam, matrix[5]/diam, matrix[9]/diam, matrix[13]/diam+0.5 };
-	float r_eq[4]={ -matrix[2]/diam, -matrix[6]/diam, -matrix[10]/diam, 0.5-matrix[14]/diam-4.0/size };
-	glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
-	glTexGenfv(GL_S, GL_EYE_PLANE, s_eq);
-	enable(GL_TEXTURE_GEN_S);
-	glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
-	glTexGenfv(GL_T, GL_EYE_PLANE, t_eq);
-	enable(GL_TEXTURE_GEN_T);
-	glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
-	glTexGenfv(GL_R, GL_EYE_PLANE, r_eq);
-	enable(GL_TEXTURE_GEN_R);
+	MatrixStack::Push push_mv(MatrixStack::modelview());
+	MatrixStack::Push push_proj(MatrixStack::projection());
 
-	TexUnit::activate(0);
+	MatrixStack::projection() = Matrix::ortho(-radius, radius, -radius, radius, -radius, radius);
+	MatrixStack::modelview() = light_matrix;
+
+	Bind bind_fbo(fbo, true);
+	Bind bind_depth(DepthTest::lequal());
+	fbo.clear(DEPTH_BUFFER_BIT);
+	renderable.render("shadow");
+}
+
+void ShadowMap::finish_frame() const
+{
+	renderable.finish_frame();
+	rendered = false;
 }
 
-void ShadowMap::cleanup()
+void ShadowMap::render(Renderer &renderer, const Tag &tag) const
 {
-	TexUnit::activate(unit);
-	Texture::unbind();
-	disable(GL_TEXTURE_GEN_S);
-	disable(GL_TEXTURE_GEN_T);
-	disable(GL_TEXTURE_GEN_R);
+	if(!enabled_passes.count(tag))
+		return renderer.render(renderable, tag);
+
+	const float *matrix = light_matrix.data();
+
+	// 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);
+
+	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);
 }