From: Michel Pollet Date: Sat, 16 Jun 2012 08:15:09 +0000 (+0100) Subject: reprap: Added shadow mapping X-Git-Tag: v1.0~65 X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=06346f65b6642990695f15b87760f4a9aa3ebd06;p=sx%2Fsimavr.git reprap: Added shadow mapping Going to split this project into another one too.. Signed-off-by: Michel Pollet --- diff --git a/examples/board_reprap/gfx/brass.png b/examples/board_reprap/gfx/brass.png new file mode 100644 index 0000000..56e73c3 Binary files /dev/null and b/examples/board_reprap/gfx/brass.png differ diff --git a/examples/board_reprap/gfx/scene.fs b/examples/board_reprap/gfx/scene.fs new file mode 100644 index 0000000..5ff1baa --- /dev/null +++ b/examples/board_reprap/gfx/scene.fs @@ -0,0 +1,82 @@ +uniform sampler2DShadow shadowMap ; + +// This define the value to move one pixel left or right +uniform vec2 pixelOffset = vec2(1.0 / 1024.0, 1.0 / 1024.0); +uniform sampler2D tex0; +varying vec2 texCoord; + +varying vec4 ShadowCoord; + + +float lookup( vec2 offSet) +{ + // Values are multiplied by ShadowCoord.w because shadow2DProj does a W division for us. + return shadow2DProj(shadowMap, + ShadowCoord + vec4( + offSet.x * pixelOffset.x * ShadowCoord.w, + offSet.y * pixelOffset.y * ShadowCoord.w, + 0.05, 0.0) ).w; +} + +void main() +{ + // Used to lower moiré pattern and self-shadowing + //shadowCoordinateWdivide.z += ; + + float shadow = 0.0; + + // Avoid counter shadow + if (ShadowCoord.w > 1.0) { + // Simple lookup, no PCF + //shadow = lookup(vec2(0.0,0.0)); + + // 8x8 kernel PCF + /* + float x,y; + for (y = -3.5 ; y <=3.5 ; y+=1.0) + for (x = -3.5 ; x <=3.5 ; x+=1.0) + shadow += lookup(vec2(x,y)); + shadow /= 64.0 ; + */ + + // 8x8 PCF wide kernel (step is 10 instead of 1) + /* + float x,y; + for (y = -30.5 ; y <=30.5 ; y+=10.0) + for (x = -30.5 ; x <=30.5 ; x+=10.0) + shadow += lookup(vec2(x,y)); + shadow /= 64.0 ; + */ + + // 4x4 kernel PCF + /* + float x,y; + for (y = -1.5 ; y <=1.5 ; y+=1.0) + for (x = -1.5 ; x <=1.5 ; x+=1.0) + shadow += lookup(vec2(x,y)); + shadow /= 16.0 ; + */ + // 4x4 PCF wide kernel (step is 10 instead of 1) + + float x,y; + for (y = -10.5 ; y <=10.5 ; y+=10.0) + for (x = -10.5 ; x <=10.5 ; x+=10.0) + shadow += lookup(vec2(x,y)); + shadow /= 16.0 ; + + + // 4x4 PCF dithered + /* + // use modulo to vary the sample pattern + vec2 o = mod(floor(gl_FragCoord.xy), 2.0); + + shadow += lookup(vec2(-1.5, 1.5) + o); + shadow += lookup(vec2( 0.5, 1.5) + o); + shadow += lookup(vec2(-1.5, -0.5) + o); + shadow += lookup(vec2( 0.5, -0.5) + o); + shadow *= 0.25 ; + */ + } + vec4 c = (shadow + 0.0) * gl_Color; + gl_FragColor = mix(texture2D(tex0, texCoord), vec4(0.0,0.0,0.0,0.9), 0.8-shadow); +} diff --git a/examples/board_reprap/gfx/scene.vs b/examples/board_reprap/gfx/scene.vs new file mode 100644 index 0000000..f11edb2 --- /dev/null +++ b/examples/board_reprap/gfx/scene.vs @@ -0,0 +1,15 @@ +// Used for shadow lookup +uniform mat4 shadowMatrix; +varying vec4 ShadowCoord; +varying vec2 texCoord; + +void main() +{ + ShadowCoord= shadowMatrix * gl_Vertex; + + gl_Position = ftransform(); + gl_TexCoord[0] = gl_MultiTexCoord0; + gl_FrontColor = gl_Color; + texCoord = gl_MultiTexCoord0.xy; +} + diff --git a/examples/board_reprap/src/reprap_gl.c b/examples/board_reprap/src/reprap_gl.c index c119b74..74df728 100644 --- a/examples/board_reprap/src/reprap_gl.c +++ b/examples/board_reprap/src/reprap_gl.c @@ -57,10 +57,27 @@ int _w = 800, _h = 600; c3context_p c3 = NULL; c3context_p hud = NULL; -c3object_p head = NULL; // hotend +c3object_p head = NULL; // hotend c3texture_p fbo_c3; // frame buffer object texture c3program_p fxaa = NULL; // full screen antialias shader -c3gl_fbo_t fbo; +c3program_p scene = NULL; +c3gl_fbo_t fbo; +c3gl_fbo_t shadow; + + +enum { + uniform_ShadowMap = 0, + uniform_pixelOffset, + uniform_tex0, + uniform_shadowMatrix +}; +const char *uniforms_scene[] = { + "shadowMap", + "pixelOffset", + "tex0", + "shadowMatrix", + NULL +}; int glsl_version = 110; @@ -92,6 +109,7 @@ _gl_reshape_cb(int w, int h) glViewport(0, 0, _w, _h); c3gl_fbo_resize(&fbo, size); c3texture_resize(fbo_c3, size); + c3context_view_get_at(c3, 0)->size = size; if (fxaa) { glUseProgram((GLuint)fxaa->pid); @@ -135,15 +153,9 @@ _gl_key_cb( static void _gl_display_cb(void) /* function called whenever redisplay needed */ { - /* - * Draw in FBO object - */ - glBindFramebuffer(GL_FRAMEBUFFER, (GLuint)fbo.fbo); - // draw (without glutSwapBuffers) - dumpError("glBindFramebuffer fbo"); - glViewport(0, 0, _w, _h); + int drawIndexes[] = { 1, 0 }; + int drawViewStart = c3->root->dirty ? 0 : 1; - c3context_view_set(c3, 0); c3vec3 headp = c3vec3f( stepper_get_position_mm(&reprap.step_x), stepper_get_position_mm(&reprap.step_y), @@ -151,44 +163,75 @@ _gl_display_cb(void) /* function called whenever redisplay needed */ c3mat4 headmove = translation3D(headp); c3transform_set(head->transform.e[0], &headmove); - if (c3->root->dirty) { - // printf("reproject head %.2f,%.2f,%.2f\n", headp.x, headp.y,headp.z); - c3context_project(c3); - } - float z_min = c3context_view_get(c3)->z.min, - z_max = c3context_view_get(c3)->z.max; - if (z_min < 0) - z_min = 10; - z_min = 10; - if (z_max < z_min || z_max > 1000) - z_max = 1000; - - glClearColor(1.0f, 1.0f, 1.0f, 1.0f); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - // Set up projection matrix - glMatrixMode(GL_PROJECTION); // Select projection matrix - c3mat4 p = perspective3D(50, (float)_w / (float)_h, z_min, z_max); - glLoadMatrixf(p.n); - -#if 0 - glCullFace(GL_BACK); - glEnable(GL_CULL_FACE); -#endif - glDepthMask(GL_TRUE); - glDepthFunc(GL_LEQUAL); - glEnable(GL_DEPTH_TEST); - glEnable(GL_LIGHTING); -// glPolygonMode( GL_FRONT_AND_BACK, GL_LINE ); + for (int vi = drawViewStart; vi < 2; vi++) { + c3context_view_set(c3, drawIndexes[vi]); - glEnable(GL_ALPHA_TEST); - glAlphaFunc(GL_GREATER, 1.0f / 255.0f); - glEnable(GL_BLEND); // Enable Blending - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Type Of Blending To Use + /* + * Draw in FBO object + */ + c3context_view_p view = c3context_view_get(c3); + glBindFramebuffer(GL_FRAMEBUFFER, (GLuint)view->bid); + // draw (without glutSwapBuffers) + dumpError("glBindFramebuffer fbo"); + glViewport(0, 0, view->size.x, view->size.y); - glMatrixMode(GL_MODELVIEW); + c3context_project(c3); - c3context_draw(c3); + glClearColor(1.0f, 1.0f, 1.0f, 1.0f); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + // Set up projection matrix + glMatrixMode(GL_PROJECTION); // Select projection matrix + glLoadMatrixf(view->projection.n); + + glEnable(GL_CULL_FACE); + glDepthMask(GL_TRUE); + glDepthFunc(GL_LEQUAL); + glEnable(GL_DEPTH_TEST); + // glPolygonMode( GL_FRONT_AND_BACK, GL_LINE ); + + //glEnable(GL_ALPHA_TEST); + //glAlphaFunc(GL_GREATER, 1.0f / 255.0f); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Type Of Blending To Use + + glMatrixMode(GL_MODELVIEW); + + + if (view->type == C3_CONTEXT_VIEW_EYE) { + // glShadeModel(GL_SMOOTH); + // glEnable(GL_LIGHTING); + glCullFace(GL_BACK); + glEnable(GL_BLEND); // Enable Blending + + c3context_view_p light = c3context_view_get_at(c3, 1); + + // This is matrix transform every coordinate x,y,z + // x = x* 0.5 + 0.5 + // y = y* 0.5 + 0.5 + // z = z* 0.5 + 0.5 + // Moving from unit cube [-1,1] to [0,1] + const c3f bias[16] = { + 0.5, 0.0, 0.0, 0.0, + 0.0, 0.5, 0.0, 0.0, + 0.0, 0.0, 0.5, 0.0, + 0.5, 0.5, 0.5, 1.0}; + + c3mat4 b = c3mat4_mul(&light->projection, (c3mat4p)bias); + c3mat4 tex = c3mat4_mul(&light->cam.mtx, &b); + + GLCHECK(glUseProgram((GLuint)scene->pid)); + glUniformMatrix4fv( + (GLuint)scene->params.e[uniform_shadowMatrix].pid, + 1, GL_FALSE, tex.n); + } else { + glCullFace(GL_FRONT); + glShadeModel(GL_FLAT); + glDisable(GL_LIGHTING); + glDisable(GL_BLEND); // Disable Blending + } + + c3context_draw(c3); + } /* * Draw back FBO over the screen @@ -203,6 +246,7 @@ _gl_display_cb(void) /* function called whenever redisplay needed */ glDisable(GL_DEPTH_TEST); glDisable(GL_LIGHTING); glDisable(GL_ALPHA_TEST); + glDisable(GL_CULL_FACE); glUseProgram(0); @@ -337,8 +381,6 @@ gl_init( glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE); /* setup some lights */ - glShadeModel(GL_SMOOTH); - glEnable(GL_LIGHTING); GLfloat global_ambient[] = { 0.5f, 0.5f, 0.5f, 1.0f }; glLightModelfv(GL_LIGHT_MODEL_AMBIENT, global_ambient); @@ -363,6 +405,7 @@ gl_init( printf("GL_SHADING_LANGUAGE_VERSION %s = %d\n", glsl, glsl_version); c3gl_fbo_create(&fbo, c3vec2f(_w, _h), (1 << C3GL_FBO_COLOR)|(1 << C3GL_FBO_DEPTH)); + // shadow buffer c3_driver_list[0] = c3gl_getdriver(); @@ -372,7 +415,8 @@ gl_init( c3cam_p cam = &c3context_view_get_at(c3, 0)->cam; cam->lookat = c3vec3f(100.0, 100.0, 0.0); cam->eye = c3vec3f(100.0, -100.0, 100.0); - + // associate the framebuffer object with this view + c3context_view_get_at(c3, 0)->bid = fbo.fbo; /* * Create a light, attach it to a movable object, and attach a sphere * to it too so it's visible. @@ -394,6 +438,23 @@ gl_init( g->hidden = 0; // hidden from light scenes } } + { + c3vec2 size = c3vec2f(1024, 1024); + c3gl_fbo_create(&shadow, size, (1 << C3GL_FBO_DEPTH_TEX)); + + c3context_view_t v = { + .type = C3_CONTEXT_VIEW_LIGHT, + .size = size, + .dirty = 1, + .index = c3->views.count, + .bid = shadow.fbo, + }; + c3cam_init(&v.cam); + c3vec3 listpos = c3vec3f(-30.0f, -30.0f, 200.0f); + v.cam.eye = listpos; + v.cam.lookat = c3vec3f(100.0, 100.0, 0.0); + c3context_view_array_add(&c3->views, v); + } { const char *path = "gfx/hb.png"; @@ -407,11 +468,29 @@ gl_init( 4, cairo_image_surface_get_stride(image), cairo_image_surface_get_data (image)); dst->name = str_new(path); + dst->normalize = 1; b->geometry.mat.texture = dst; b->size = c3vec2f(200, 200); b->geometry.mat.color = c3vec4f(1.0, 1.0, 1.0, 1.0); // c3transform_new(head); } + c3pixels_p brass_tex = NULL; + { + const char *path = "gfx/brass.png"; + cairo_surface_t * image = cairo_image_surface_create_from_png (path); + printf("image = %p %p\n", image, cairo_image_surface_get_data (image)); + + c3pixels_p dst = c3pixels_new( + cairo_image_surface_get_width (image), + cairo_image_surface_get_height (image), + 4, cairo_image_surface_get_stride(image), + cairo_image_surface_get_data (image)); + dst->name = str_new(path); + dst->normalize = 1; + c3pixels_array_add(&c3->pixels, dst); +// c3transform_new(head); + brass_tex = dst; + } c3pixels_p line_aa_tex = NULL; { const char *path = "gfx/BlurryCircle.png"; @@ -505,11 +584,11 @@ gl_init( } head = c3stl_load("gfx/buserror-nozzle-model.stl", c3->root); - //head = c3object_new(c3->root); c3transform_new(head); if (head->geometry.count > 0) { c3geometry_factor(head->geometry.e[0], 0.1, (20 * M_PI) / 180.0); head->geometry.e[0]->mat.color = c3vec4f(0.6, 0.5, 0.0, 1.0); + head->geometry.e[0]->mat.texture = brass_tex; } #if 0 @@ -557,6 +636,38 @@ gl_init( fbo_c3 = b; } + { + /* + * need to insert a header since there is nothing to detect the version number + * reliably without it, and __VERSION__ returns idiocy + */ + char head[128]; + sprintf(head, "#version %d\n#define GLSL_VERSION %d\n", glsl_version, glsl_version); + + scene = c3program_new("scene", uniforms_scene); + scene->verbose = 1; + c3program_array_add(&c3->programs, scene); + c3program_load_shader(scene, GL_VERTEX_SHADER, head, + "gfx/scene.vs", C3_PROGRAM_LOAD_UNIFORM); + c3program_load_shader(scene, GL_FRAGMENT_SHADER, head, + "gfx/scene.fs", C3_PROGRAM_LOAD_UNIFORM); + c3gl_program_load(scene); + + GLCHECK(glUseProgram((GLuint)scene->pid)); + GLCHECK(glUniform1i( + (GLuint)scene->params.e[uniform_ShadowMap].pid, 7)); + GLCHECK(glUniform1i( + (GLuint)scene->params.e[uniform_tex0].pid, 0)); + c3vec2 isize = c3vec2f(1.0f / c3->views.e[1].size.x, + 1.0f / c3->views.e[1].size.y); + GLCHECK(glUniform2fv( + (GLuint)scene->params.e[uniform_pixelOffset].pid, 1, + isize.n)); + glActiveTexture(GL_TEXTURE7); + GLCHECK(glBindTexture(GL_TEXTURE_2D, + (GLuint)shadow.buffers[C3GL_FBO_DEPTH_TEX].bid)); + glActiveTexture(GL_TEXTURE0); + } { c3vec3 p[4] = { c3vec3f(10,10,0), c3vec3f(800-10,10,0),