shadow works

Texture.cpp

@@ -815,7 +815,7 @@ texture_manager::bind( texture_handle const Texture ) {
 #ifndef EU07_DEFERRED_TEXTURE_UPLOAD
         // NOTE: we could bind dedicated 'error' texture here if the id isn't valid
         ::glBindTexture( GL_TEXTURE_2D, texture(Texture).id );
-        m_activetexture = texture(Texture).id;
+		m_activetexture = Texture;
 #else
         if( texture( Texture ).bind() == resource_state::good ) {
             m_activetexture = Texture;

openglmatrixstack.h

@@ -51,6 +51,10 @@ public:
         translate( glm::vec3 const &Translation ) {
             m_stack.top() = glm::translate( m_stack.top(), Translation );
             upload(); }
+	void
+		load(glm::mat4 const &Matrix) {
+		m_stack.top() = Matrix;
+		upload(); }
     void
         multiply( glm::mat4 const &Matrix ) {
             m_stack.top() *= Matrix;
@@ -132,6 +136,11 @@ public:
             m_stacks[ m_mode ].multiply(
                 glm::make_mat4( Matrix ) ); }
 	template <typename Type_>
+	void
+		load(Type_ const *Matrix) {
+		m_stacks[m_mode].load(
+			glm::make_mat4(Matrix)); }
+    template <typename Type_>
     void
         perspective( Type_ const Fovy, Type_ const Aspect, Type_ const Znear, Type_ const Zfar ) {
             m_stacks[ m_mode ].perspective(
@@ -179,5 +188,6 @@ extern opengl_matrices OpenGLMatrices;
 #define glMultMatrixf OpenGLMatrices.multiply
 #define gluPerspective OpenGLMatrices.perspective
 #define gluLookAt OpenGLMatrices.look_at
+#define glLoadMatrixf OpenGLMatrices.load
 
 //---------------------------------------------------------------------------

renderer.cpp

@@ -22,6 +22,8 @@ http://mozilla.org/MPL/2.0/.
 #include "usefull.h"
 #include "World.h"
 
+#include <glm/gtx/string_cast.hpp>
+
 opengl_renderer GfxRenderer;
 extern TWorld World;
 
@@ -101,10 +103,29 @@ opengl_renderer::Init( GLFWwindow *Window ) {
     Global::daylight.color.x = 255.0f / 255.0f;
     Global::daylight.color.y = 242.0f / 255.0f;
     Global::daylight.color.z = 231.0f / 255.0f;
-
-	shader = gl_program_light({ gl_shader("lighting.vert"), gl_shader("blinnphong.frag") });
 	Global::daylight.intensity = 1.0f; //m7todo: przenieść
 
+	shader = gl_program_light({ gl_shader("lighting.vert"), gl_shader("blinnphong.frag") });
+	depth_shader = gl_program_mvp({ gl_shader("shadowmap.vert"), gl_shader("empty.frag") });
+	active_shader = &shader;
+
+	glGenFramebuffers(1, &depth_fbo);
+	glGenTextures(1, &depth_tex);
+	glBindTexture(GL_TEXTURE_2D, depth_tex);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT,
+		1024, 1024, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glBindTexture(GL_TEXTURE_2D, 0);
+	
+	glBindFramebuffer(GL_FRAMEBUFFER, depth_tex);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth_tex, 0);
+	glDrawBuffer(GL_NONE);
+	glReadBuffer(GL_NONE);
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+	glBindTexture(GL_TEXTURE_2D, 0);
 
     // preload some common textures
     WriteLog( "Loading common gfx data..." );
@@ -139,30 +160,68 @@ opengl_renderer::Render() {
     ::glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
     ::glDepthFunc( GL_LEQUAL );
 
-    ::glMatrixMode( GL_PROJECTION ); // select the Projection Matrix
+    ::glMatrixMode( GL_PROJECTION );
-    ::gluPerspective(
+    glm::mat4 perspective = glm::perspective(
-        Global::FieldOfView / Global::ZoomFactor,
+        glm::radians(Global::FieldOfView / Global::ZoomFactor),
         std::max( 1.0f, (float)Global::ScreenWidth ) / std::max( 1.0f, (float)Global::ScreenHeight ),
         0.1f * Global::ZoomFactor,
         m_drawrange * Global::fDistanceFactor );
+	glLoadMatrixf(glm::value_ptr(perspective));
 
-    ::glMatrixMode( GL_MODELVIEW ); // Select The Modelview Matrix
+    ::glMatrixMode( GL_MODELVIEW );
     ::glLoadIdentity();
 
     if( World.InitPerformed() ) {
+        glDebug("rendering shadow map");
+        glDisable(GL_FRAMEBUFFER_SRGB);
+        glViewport(0, 0, 1024, 1024);
+
+        glm::mat4 depthproj = glm::ortho(-10.0f, 10.0f, -10.0f, 10.0f, 0.1f, 100.0f);
+		glm::vec3 playerpos = glm::vec3(World.Camera.Pos.x, World.Camera.Pos.y, World.Camera.Pos.z);
+		glm::vec3 shadoweye = playerpos - Global::daylight.direction * 50.0f;
+		Global::SetCameraPosition(Math3D::vector3(shadoweye));
+        glm::mat4 depthcam = glm::lookAt(shadoweye,
+				playerpos,
+                glm::vec3(0.0f, 1.0f, 0.0f));
+        m_camera.update_frustum(depthproj, depthcam);
+        glMatrixMode(GL_PROJECTION);
+        glLoadMatrixf(glm::value_ptr(depthproj));
+        glMatrixMode(GL_MODELVIEW);
+        glMultMatrixf(glm::value_ptr(glm::mat4(glm::mat3(depthcam))));
+
+        glBindFramebuffer(GL_FRAMEBUFFER, depth_fbo);
+        glClear(GL_DEPTH_BUFFER_BIT);
+        active_shader = &depth_shader; depth_shader.bind();
+        Render(&World.Ground);
+        active_shader = nullptr; depth_shader.unbind();
+        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+        glViewport(0, 0, Global::ScreenWidth, Global::ScreenHeight);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        glMatrixMode(GL_PROJECTION);
+        glLoadMatrixf(glm::value_ptr(perspective));
+        glMatrixMode(GL_MODELVIEW);
+        glLoadIdentity();
+		glActiveTexture(GL_TEXTURE1);
+		glBindTexture(GL_TEXTURE_2D, depth_tex);
+		glActiveTexture(GL_TEXTURE0);
 
         glm::dmat4 worldcamera;
         World.Camera.SetMatrix( worldcamera );
         m_camera.update_frustum( OpenGLMatrices.data( GL_PROJECTION ), worldcamera);
-        // frustum tests are performed in 'world space' but after we set up frustum
-        // we no longer need camera translation, only rotation
 		::glMultMatrixd(glm::value_ptr(glm::dmat4(glm::dmat3(worldcamera))));
 		glDebug("rendering environment");
 		glDisable(GL_FRAMEBUFFER_SRGB);
         Render( &World.Environment );
 		glDebug("rendering world");
-		shader.bind();
 		glEnable(GL_FRAMEBUFFER_SRGB);
+		shader.bind(); active_shader = &shader;
+
+		glm::vec3 transdiff = Global::daylight.direction * 50.0f;
+		glm::mat3 rotdiff = glm::inverse(glm::mat3(depthcam)) * glm::mat3(worldcamera);
+		glm::mat4 lv = depthproj * glm::translate(glm::mat4(rotdiff), transdiff);
+
+		shader.set_lightview(lv);
         Render( &World.Ground );
 
 		glDebug("rendering cab");
@@ -174,7 +233,7 @@ opengl_renderer::Render() {
     }
 
 	glDebug("rendering ui");
-	shader.unbind();
+	gl_program::unbind(); active_shader = nullptr;
 	glEnable(GL_FRAMEBUFFER_SRGB);
     UILayer.render();
 	glDebug("rendering end");
@@ -364,7 +423,7 @@ opengl_renderer::Texture( texture_handle const Texture ) {
 bool
 opengl_renderer::Render( TGround *Ground ) {
 
-	shader.set_p(OpenGLMatrices.data(GL_PROJECTION));
+	active_shader->set_p(OpenGLMatrices.data(GL_PROJECTION));
 
     ::glEnable( GL_LIGHTING );
     ::glDisable( GL_BLEND );
@@ -525,7 +584,7 @@ opengl_renderer::Render( TGroundNode *Node ) {
     }
 
 	auto const originoffset = Node->m_rootposition - Global::pCameraPosition;
-	shader.set_mv(glm::translate(OpenGLMatrices.data(GL_MODELVIEW), glm::vec3(originoffset.x, originoffset.y, originoffset.z)));
+	active_shader->set_mv(glm::translate(OpenGLMatrices.data(GL_MODELVIEW), glm::vec3(originoffset.x, originoffset.y, originoffset.z)));
 
     switch (Node->iType) {
 
@@ -722,16 +781,14 @@ opengl_renderer::Render( TModel3d *Model, material_data const *Material, Math3D:
 
 void opengl_renderer::Render(TSubModel *Submodel)
 {
-	shader.set_mv(OpenGLMatrices.data(GL_MODELVIEW));
+	active_shader->copy_gl_mvp();
-	shader.set_p(OpenGLMatrices.data(GL_PROJECTION));
 	Render(Submodel, OpenGLMatrices.data(GL_MODELVIEW));
 	shader.set_material(0.0f, glm::vec3(0.0f));
 }
 
 void opengl_renderer::Render_Alpha(TSubModel *Submodel)
 {
-	shader.set_mv(OpenGLMatrices.data(GL_MODELVIEW));
+	active_shader->copy_gl_mvp();;
-	shader.set_p(OpenGLMatrices.data(GL_PROJECTION));
 	Render_Alpha(Submodel, OpenGLMatrices.data(GL_MODELVIEW));
 	shader.set_material(0.0f, glm::vec3(0.0f));
 }
@@ -750,7 +807,7 @@ opengl_renderer::Render( TSubModel *Submodel, glm::mat4 m) {
 				mm *= glm::make_mat4(Submodel->fMatrix->e);
 			if (Submodel->b_Anim)
 				Submodel->RaAnimation(mm, Submodel->b_Anim);
-			shader.set_mv(mm);
+			active_shader->set_mv(mm);
 		}
 
         if( Submodel->eType < TP_ROTATOR ) {
@@ -796,6 +853,7 @@ opengl_renderer::Render( TSubModel *Submodel, glm::mat4 m) {
 					gl_program::unbind();
 
 					glEnableClientState(GL_VERTEX_ARRAY);
+					glPushMatrix();
 					glLoadMatrixf(glm::value_ptr(mm));
 					glVertexPointer(3, GL_FLOAT, sizeof(basic_vertex), static_cast<char *>(nullptr)); // pozycje
 
@@ -814,6 +872,7 @@ opengl_renderer::Render( TSubModel *Submodel, glm::mat4 m) {
                     // post-draw reset
                     ::glPopAttrib();
 					glDisableClientState(GL_VERTEX_ARRAY);
+					glPopMatrix();
 
 					gl_program::bind_last();
                 }
@@ -848,7 +907,7 @@ opengl_renderer::Render( TSubModel *Submodel, glm::mat4 m) {
                 Render( Submodel->Child, mm );
 
         if( Submodel->iFlags & 0xC000 )
-			shader.set_mv(m);
+			active_shader->set_mv(m);
     }
 	
     if( Submodel->b_Anim < at_SecondsJump )
@@ -960,7 +1019,7 @@ opengl_renderer::Render_Alpha( TGroundNode *Node ) {
     }
 
 	auto const originoffset = Node->m_rootposition - Global::pCameraPosition;
-	shader.set_mv(glm::translate(OpenGLMatrices.data(GL_MODELVIEW), glm::vec3(originoffset.x, originoffset.y, originoffset.z)));
+	active_shader->set_mv(glm::translate(OpenGLMatrices.data(GL_MODELVIEW), glm::vec3(originoffset.x, originoffset.y, originoffset.z)));
 
     switch (Node->iType)
     {
@@ -1196,7 +1255,7 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel, glm::mat4 m) {
 				mm *= glm::make_mat4(Submodel->fMatrix->e);
 			if (Submodel->b_Anim)
 				Submodel->RaAnimation(mm, Submodel->b_Anim);
-			shader.set_mv(mm);
+			active_shader->set_mv(mm);
 		}
 
         if( Submodel->eType < TP_ROTATOR ) {
@@ -1250,6 +1309,7 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel, glm::mat4 m) {
 						glm::mat4 x = glm::mat4(1.0f);
 						x = glm::translate(x, glm::vec3(lightcenter.x, lightcenter.y, lightcenter.z)); // początek układu zostaje bez zmian
 						x = glm::rotate(x, atan2(lightcenter.x, lightcenter.y), glm::vec3(0.0f, 1.0f, 0.0f)); // jedynie obracamy w pionie o kąt
+						glPushMatrix();
 						glLoadMatrixf(glm::value_ptr(x));
 
                         // main draw call
@@ -1262,6 +1322,7 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel, glm::mat4 m) {
                         + CameraUp_worldspace * squareVertices.y * BillboardSize.y;
                         // ...etc instead IF we had easy access to camera's forward and right vectors. TODO: check if Camera matrix is accessible
 */
+						glPopMatrix();
                         ::glPopAttrib();
 						glDisableClientState(GL_VERTEX_ARRAY);
 
@@ -1276,7 +1337,7 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel, glm::mat4 m) {
                 Render_Alpha( Submodel->Child, mm );
 
         if( Submodel->iFlags & 0xC000 )
-			shader.set_mv(m);
+			active_shader->set_mv(m);
     }
 
     if( Submodel->b_aAnim < at_SecondsJump )

renderer.h

@@ -61,6 +61,9 @@ class opengl_renderer {
 
 public:
 	gl_program_light shader;
+	gl_program_mvp depth_shader;
+	gl_program_mvp *active_shader = nullptr;
+	GLuint depth_tex, depth_fbo;
 
 // types
 

shader.cpp

@@ -130,11 +130,14 @@ void gl_program_mvp::copy_gl_mvp()
 }
 
 void gl_program_mvp::set_mv(const glm::mat4 &m)
+{
+	if (mvn_uniform != -1)
 	{
 		glm::mat3 mvn = glm::mat3(glm::transpose(glm::inverse(m)));
-	glUniformMatrix4fv(mv_uniform, 1, GL_FALSE, glm::value_ptr(m));
 		glUniformMatrix3fv(mvn_uniform, 1, GL_FALSE, glm::value_ptr(mvn));
 	}
+	glUniformMatrix4fv(mv_uniform, 1, GL_FALSE, glm::value_ptr(m));
+}
 
 void gl_program_mvp::set_p(const glm::mat4 &m)
 {
@@ -145,6 +148,9 @@ gl_program_light::gl_program_light(std::vector<gl_shader> v) : gl_program_mvp(v)
 {
 	bind();
 
+	glUniform1i(glGetUniformLocation(id, "tex"), 0);
+	glUniform1i(glGetUniformLocation(id, "shadowmap"), 1);
+	lightview_uniform = glGetUniformLocation(id, "lightview");
 	ambient_uniform = glGetUniformLocation(id, "ambient");
 	emission_uniform = glGetUniformLocation(id, "emission");
 	specular_uniform = glGetUniformLocation(id, "specular");
@@ -167,22 +173,36 @@ gl_program_light::gl_program_light(std::vector<gl_shader> v) : gl_program_mvp(v)
 	glUniform1ui(lcount_uniform, 0);
 }
 
+void gl_program_light::set_lightview(glm::mat4 &lightview)
+{
+	if (current_program != this)
+		return;
+
+	glUniformMatrix4fv(lightview_uniform, 1, GL_FALSE, glm::value_ptr(lightview));
+}
+
 void gl_program_light::set_ambient(glm::vec3 &ambient)
 {
-	bind();
+	if (current_program != this)
+		return;
+
 	glUniform3fv(ambient_uniform, 1, glm::value_ptr(ambient));
 }
 
 void gl_program_light::set_fog(float density, glm::vec3 &color)
 {
-	bind();
+	if (current_program != this)
+		return;
+
 	glUniform1f(fog_density_uniform, density);
 	glUniform3fv(fog_color_uniform, 1, glm::value_ptr(color));
 }
 
 void gl_program_light::set_light_count(GLuint count)
 {
-	bind();
+	if (current_program != this)
+		return;
+
 	glUniform1ui(lcount_uniform, count);
 }
 
@@ -190,12 +210,14 @@ void gl_program_light::set_light(GLuint i, type t, glm::vec3 &pos, glm::vec3 &di
 	float in_cutoff, float out_cutoff,
 	glm::vec3 &color, float linear, float quadratic)
 {
+	if (current_program != this)
+		return;
+
 	glm::mat4 mv = OpenGLMatrices.data(GL_MODELVIEW);
 
 	glm::vec3 trans_pos = mv * glm::vec4(pos.x, pos.y, pos.z, 1.0f);
 	glm::vec3 trans_dir = mv * glm::vec4(dir.x, dir.y, dir.z, 0.0f);
 
-	bind();
 	glUniform1ui(lights_uniform[i].type, (GLuint)t);
 	glUniform3fv(lights_uniform[i].pos, 1, glm::value_ptr(trans_pos));
 	glUniform3fv(lights_uniform[i].dir, 1, glm::value_ptr(trans_dir));
@@ -208,7 +230,9 @@ void gl_program_light::set_light(GLuint i, type t, glm::vec3 &pos, glm::vec3 &di
 
 void gl_program_light::set_material(float specular, glm::vec3 &emission)
 {
-	bind();
+	if (current_program != this)
+		return;
+
 	glUniform1f(specular_uniform, specular);
 	glUniform3fv(emission_uniform, 1, glm::value_ptr(emission));
 }

shader.h

@@ -35,7 +35,7 @@ public:
 class gl_program_mvp : public gl_program
 {
 	GLuint mv_uniform;
-	GLuint mvn_uniform;
+	GLint mvn_uniform;
 	GLuint p_uniform;
 
 public:
@@ -62,6 +62,7 @@ public:
 	gl_program_light() = default;
 	gl_program_light(std::vector<gl_shader>);
 
+	void set_lightview(glm::mat4 &lightview);
 	void set_ambient(glm::vec3 &ambient);
 	void gl_program_light::set_fog(float density, glm::vec3 &color);
 	void set_material(float specular, glm::vec3 &emission);
@@ -70,6 +71,7 @@ public:
 		glm::vec3 &color, float linear, float quadratic);
 
 private:
+	GLuint lightview_uniform;
 	GLuint ambient_uniform;
 	GLuint specular_uniform;
 	GLuint fog_color_uniform;

shaders/blinnphong.frag

@@ -23,10 +23,12 @@ struct light_s
 in vec3 f_normal;
 in vec2 f_coord;
 in vec3 f_pos;
+in vec4 f_light_pos;
 
 out vec4 color;
 
 uniform sampler2D tex;
+uniform sampler2D shadowmap;
 
 uniform vec3 ambient;
 uniform vec3 emission;
@@ -37,6 +39,16 @@ uniform float specular;
 uniform light_s lights[8];
 uniform uint lights_count;
 
+float calc_shadow()
+{
+	vec3 coords = f_light_pos.xyz / f_light_pos.w;
+	coords = coords * 0.5 + 0.5;
+	float closest_depth = texture(shadowmap, coords.xy).r;
+	float current_depth = coords.z;
+	float shadow = current_depth > closest_depth ? 0.0 : 1.0;
+	return shadow;
+}
+
 vec3 apply_fog(vec3 color)
 {
 	float sun_amount = 0.0;
@@ -90,6 +102,7 @@ float calc_dir_light(light_s light)
 
 void main()
 {
+	float shadow = calc_shadow();
 	vec3 result = ambient * 0.3 + emission;
 	for (uint i = 0U; i < lights_count; i++)
 	{
@@ -103,7 +116,7 @@ void main()
 		else if (light.type == LIGHT_DIR)
 			part = calc_dir_light(light);
 		
-		result += light.color * part;
+		result += light.color * part * shadow;
 	}
 	
 	vec4 tex_color = texture(tex, f_coord);	

shaders/empty.frag

@@ -0,0 +1,7 @@
+#version 330
+
+in vec3 f_pos;
+
+void main()
+{
+}

shaders/lighting.vert

@@ -7,7 +7,9 @@ layout (location = 2) in vec2 v_coord;
 out vec3 f_normal;
 out vec2 f_coord;
 out vec3 f_pos;
+out vec4 f_light_pos;
 
+uniform mat4 lightview;
 uniform mat4 modelview;
 uniform mat3 modelviewnormal;
 uniform mat4 projection;
@@ -18,4 +20,6 @@ void main()
 	f_normal = modelviewnormal * v_normal;
 	f_coord = v_coord;
 	f_pos = vec3(modelview * vec4(v_vert, 1.0f));
+	//f_light_pos = lightview * vec4(f_pos, 1.0f);
+	f_light_pos = lightview * vec4(f_pos, 1.0f);
 }

shaders/shadowmap.vert

@@ -0,0 +1,13 @@
+#version 330
+
+layout (location = 0) in vec3 v_vert;
+
+out vec3 f_pos;
+
+uniform mat4 modelview;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = (projection * modelview) * vec4(v_vert, 1.0f);
+}