Realistic View: Phong Shading + Ambient Oclusion + Cast Shadows (#13704)

* Phong Shading * Add shader selection to graphics preferences * SSAO * 3D canvas menu Co-Authored-By: yw4z <yw4z@outlook.com> * better SSAO * Adjust * phong in preview mode * cast shadows sombra 3 sombra 2 * fix 1 * SSAO independent * Fix 2 * clean 1 * shadows availables with gouraud * Update Preferences.cpp * tweeks * No Normal textures * Depth texture allocation * avoid rebinding/redefining state each render. * free SSAO * set shadow fill color * remove duplicated code * cached model to avoid per-frame uploads * yw4z suggestion Co-Authored-By: yw4z <yw4z@outlook.com> * Update Preferences.cpp Co-Authored-By: yw4z <yw4z@outlook.com> * Update GLCanvas3D.cpp * only gouraud for preview mode * Apply suggestions from code review Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Add new OpenGL shading model setting * Update src/slic3r/GUI/GLCanvas3D.cpp * Apply suggestion from @RF47 * Title Case * normal textures * gamma 2.2 Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com> * Revert "gamma 2.2" This reverts commit 909a84af604a080b3f4b8dd67d13956473a77afe. * Reapply "gamma 2.2" This reverts commit 0f0c3d9ec0d2c9647ce06afac4fe9266b5ffda97. * AO blend Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com> * Revert "AO blend" This reverts commit c5c9a3aa6b295704e71299451b937648e5c5f109. * 4.0 pixel radius * windows light effect direccion brillo * smoothing * ajuste de brillo * ajustes de brillo * No SSAO for bed * disable realistic view on paint gismos * Update ssao.fs * circular panel --------- Co-authored-by: yw4z <yw4z@outlook.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> Co-authored-by: Ian Bassi <ian.bassi@outlook.com> Co-authored-by: Ian Bassi <12130714+ianalexis@users.noreply.github.com> Co-authored-by: SoftFever <softfeverever@gmail.com>
2026-09-09 18:27:00 +00:00 · 2026-06-04 07:22:06 -03:00
parent e0a47c61a2
commit cf8bb38dc6
16 changed files with 1303 additions and 9 deletions
--- a/resources/shaders/140/ssao.fs
+++ b/resources/shaders/140/ssao.fs
@@ -0,0 +1,103 @@
+#version 140
+
+/**
+ * SSAO Shader - GLSL 140 version with sharp depth threshold
+ * Only darkens valleys/concave areas, ignores smooth variations
+ */
+
+uniform sampler2D color_texture;
+uniform sampler2D depth_texture;
+uniform sampler2D normal_texture;   
+uniform float z_near;
+uniform float z_far;
+
+in vec2 tex_coord;
+out vec4 frag_color;
+
+float linearize_depth(float depth)
+{
+    float z = depth * 2.0 - 1.0;
+    return (2.0 * z_near * z_far) / (z_far + z_near - z * (z_far - z_near));
+}
+
+void main()
+{
+    ivec2 pixel = ivec2(gl_FragCoord.xy);
+    float center_depth = linearize_depth(texelFetch(depth_texture, pixel, 0).r);
+    
+    // Sample normal buffer (stored as RGB in 0-1 range, convert to -1 to 1)
+    vec3 normal_center = texelFetch(normal_texture, pixel, 0).rgb * 2.0 - 1.0;
+    normal_center = normalize(normal_center);
+    
+    // Calculate upward-facing factor (Z-up coordinate system)
+    float up_factor = clamp(normal_center.z * 1.5, 0.0, 1.0);
+    
+    // Adaptive radius in pixel space
+    int radius = int(mix(2.0, 4.0, center_depth / z_far));
+
+    // Optimized sampling pattern
+    const ivec2 offsets[12] = ivec2[](
+        ivec2(1, 0),  ivec2(-1, 0),  ivec2(0, 1),  ivec2(0, -1),
+        ivec2(1, 1),  ivec2(-1, 1),  ivec2(1, -1), ivec2(-1, -1),
+        ivec2(2, 0),  ivec2(-2, 0),  ivec2(0, 2),  ivec2(0, -2)
+    );
+
+    float occlusion = 0.0;
+    int valid_samples = 0;
+
+    for (int i = 0; i < 12; i++) {
+        ivec2 sample_pixel = pixel + offsets[i] * radius;
+        
+        if (sample_pixel.x < 0 || sample_pixel.y < 0) 
+            continue;
+        
+        float sample_depth = linearize_depth(texelFetch(depth_texture, sample_pixel, 0).r);
+        
+        // Sample normal at neighbor
+        vec3 normal_sample = texelFetch(normal_texture, sample_pixel, 0).rgb * 2.0 - 1.0;
+        
+        // Depth difference (positive if neighbor is closer to camera)
+        float depth_diff = center_depth - sample_depth;
+        
+        // Sharp depth threshold ===
+        // Minimum depth difference to consider occlusion (ignores small variations)
+        float threshold_min = 0.008;  // Higher = only deep valleys get darkened
+        float threshold_max = 0.04;   // Transition range for full occlusion
+        
+        float contribution = 0.0;
+        if (depth_diff > threshold_min) {
+            // Abrupt mapping with power curve
+            contribution = (depth_diff - threshold_min) / (threshold_max - threshold_min);
+            contribution = clamp(contribution, 0.0, 1.0);
+            contribution = pow(contribution, 2.0);  // Steeper curve for sharper transition
+        }
+        
+        // Reduce occlusion on planar surfaces (similar normals)
+        float normal_similarity = dot(normal_center, normal_sample);
+        float planar_factor = smoothstep(0.75, 0.95, normal_similarity);
+        contribution *= (1.0 - planar_factor * 0.6);
+        
+        occlusion += contribution;
+        valid_samples++;
+    }
+
+    if (valid_samples > 0) {
+        // Calculate ambient occlusion factor with higher base intensity
+        float ao_factor = 1.0 - (occlusion / float(valid_samples)) * 0.6;
+        
+        // Keep bright areas clean (higher minimum for upward-facing surfaces)
+        float ao_min = mix(0.55, 0.85, up_factor);
+        ao_factor = clamp(ao_factor, ao_min, 1.0);
+        
+        // Slight brightness boost for upward-facing surfaces
+        float brightness_boost = 1.0 + up_factor * 0.15;
+        ao_factor = ao_factor * brightness_boost;
+        
+        occlusion = ao_factor;
+    } else {
+        occlusion = 1.0;
+    }
+
+    vec3 color = texture(color_texture, tex_coord).rgb;
+    frag_color = vec4(color * occlusion, 1.0);
+}