style: modify grid shader

Author: hoffstadt

editor/app.c

@@ -77,6 +77,9 @@ Index of this file:
 #include "pl_vfs_ext.h"
 #include "pl_compress_ext.h"
 
+// shaders
+#include "pl_shader_interop_renderer.h" // PL_MESH_FORMAT_FLAG_XXXX
+
 //-----------------------------------------------------------------------------
 // [SECTION] global apis
 //-----------------------------------------------------------------------------

editor/editor.h

@@ -73,6 +73,9 @@ Index of this file:
 #include "pl_bvh_ext.h"
 #include "pl_shader_variant_ext.h"
 
+// shaders
+#include "pl_shader_interop_renderer.h" // PL_MESH_FORMAT_FLAG_XXXX
+
 // dear imgui
 #include "pl_dear_imgui_ext.h"
 #include "imgui.h"

extensions/pl_model_loader_ext.c

@@ -32,6 +32,9 @@ Index of this file:
 #include "pl_renderer_ext.h"
 #include "pl_vfs_ext.h"
 
+// shaders
+#include "pl_shader_interop_renderer.h" // PL_MESH_FORMAT_FLAG_XXXX
+
 #ifdef PL_UNITY_BUILD
     #include "pl_unity_ext.inc"
 #else

extensions/pl_renderer_ext.c

@@ -267,7 +267,7 @@ pl_renderer_initialize(plRendererSettings tSettings)
     gptData->tRuntimeOptions.fGridCellSize = 0.025f;
     gptData->tRuntimeOptions.fGridMinPixelsBetweenCells = 2.0f;
     gptData->tRuntimeOptions.tGridColorThin = (plVec4){0.5f, 0.5f, 0.5f, 1.0f};
-    gptData->tRuntimeOptions.tGridColorThick = (plVec4){1.0f, 1.0f, 1.0f, 1.0f};
+    gptData->tRuntimeOptions.tGridColorThick = (plVec4){0.75f, 0.75f, 0.75f, 1.0f};
 
     gptResource->initialize((plResourceManagerInit){.ptDevice = gptData->ptDevice, .uMaxTextureResolution = tSettings.uMaxTextureResolution});
 
@@ -2796,6 +2796,8 @@ pl_renderer_render_view(plView* ptView, plCamera* ptCamera, plCamera* ptCullCame
 
     if(ptView->bShowGrid)
     {
+        ptView->bShowGrid = false;
+        
         plShaderHandle tGridShader = gptShaderVariant->get_shader("grid", NULL, NULL, NULL, &gptData->tRenderPassLayout);
         gptGfx->bind_shader(ptSceneEncoder, tGridShader);
 
@@ -2807,6 +2809,7 @@ pl_renderer_render_view(plView* ptView, plCamera* ptCamera, plCamera* ptCullCame
         ptGridDynamicData->fGridMinPixelsBetweenCells = gptData->tRuntimeOptions.fGridMinPixelsBetweenCells;
         ptGridDynamicData->tGridColorThin = gptData->tRuntimeOptions.tGridColorThin;
         ptGridDynamicData->tGridColorThick = gptData->tRuntimeOptions.tGridColorThick;
+        ptGridDynamicData->tViewDirection.xyz = ptCamera->_tForwardVec;
         ptGridDynamicData->fCameraXPos = ptCamera->tPos.x;
         ptGridDynamicData->fCameraZPos = ptCamera->tPos.z;
         ptGridDynamicData->tCameraViewProjection = tMVP;

extensions/pl_renderer_ext.h

@@ -67,10 +67,9 @@ Index of this file:
 // [SECTION] includes
 //-----------------------------------------------------------------------------
 
-#include "pl_ecs_ext.inl"               // plEntity
-#include "pl_resource_ext.inl"          // plResourceHandle
-#include "pl_math.h"                    // plVec3, plMat4
-#include "pl_shader_interop_renderer.h" // plLightType
+#include "pl_ecs_ext.inl"      // plEntity
+#include "pl_resource_ext.inl" // plResourceHandle
+#include "pl_math.h"           // plVec3, plMat4
 
 //-----------------------------------------------------------------------------
 // [SECTION] forward declarations
@@ -114,13 +113,18 @@ typedef struct _plRenderEncoder    plRenderEncoder;    // pl_graphics_ext.h
 typedef union  plRenderPassHandle  plRenderPassHandle; // pl_graphics_ext.h
 typedef union  plBindGroupHandle   plBindGroupHandle;  // pl_graphics_ext.h
 typedef void* plTextureId;                             // pl_ui.h
-typedef int plDrawFlags;                               // pl_draw_ext.h
+
 
 // external (pl_ecs_ext.h)
 typedef struct _plComponentLibrary plComponentLibrary;
 typedef struct _plCamera           plCamera;
 typedef struct _plLightComponent   plLightComponent;
 
+// external
+typedef int plShaderDebugMode; // pl_shader_interop_renderer.h
+typedef int plLightType;       // pl_shader_interop_renderer.h
+typedef int plDrawFlags;       // pl_draw_ext.h
+
 //-----------------------------------------------------------------------------
 // [SECTION] public api structs
 //-----------------------------------------------------------------------------
@@ -214,8 +218,6 @@ typedef struct _plRendererI
 // [SECTION] structs
 //-----------------------------------------------------------------------------
 
-
-
 typedef struct _plSceneInit
 {
     plComponentLibrary* ptComponentLibrary;

shaders/grid.frag

@@ -52,7 +52,7 @@ gridColor(vec2 uv, vec2 camPos)
   float lod2 = lod1 * 10.0;
 
   // each anti-aliased line covers up to 4 pixels
-  dudv *= 4.0;
+  dudv *= 2.0;
 
   // set grid coordinates to the centers of anti-aliased lines for subsequent alpha calculations
   uv += dudv * 0.5;
@@ -64,11 +64,16 @@ gridColor(vec2 uv, vec2 camPos)
 
   uv -= camPos;
 
+  vec3 view_dir = normalize(tObjectInfo.tData.tViewDirection.xyz);
+  float op_gracing = 1.f - pow(1.0 - abs(dot(view_dir, vec3(0.0, 1.0, 0.0))), 16);
+  // float op_gracing = 1.0;
+
   // blend between falloff colors to handle LOD transition
   vec4 c = lod2a > 0.0 ? tObjectInfo.tData.tGridColorThick : lod1a > 0.0 ? mix(tObjectInfo.tData.tGridColorThick, tObjectInfo.tData.tGridColorThin, lodFade) : tObjectInfo.tData.tGridColorThin;
 
   // calculate opacity falloff based on distance to grid extents
   float opacityFalloff = (1.0 - satf(length(uv) / tObjectInfo.tData.fGridSize));
+  opacityFalloff *= op_gracing;
 
   // blend between LOD level alphas and scale with opacity falloff
   c.a *= (lod2a > 0.0 ? lod2a : lod1a > 0.0 ? lod1a : (lod0a * (1.0-lodFade))) * opacityFalloff;

shaders/pl_shader_interop_renderer.h

@@ -178,6 +178,9 @@ PL_BEGIN_STRUCT(plGpuDynGrid)
     int   _iUnused2;
     // ~~~~~~~~~~~~~~~~16 bytes~~~~~~~~~~~~~~~~
 
+    vec4 tViewDirection;
+    // ~~~~~~~~~~~~~~~~16 bytes~~~~~~~~~~~~~~~~
+
     vec4 tGridColorThin;
     // ~~~~~~~~~~~~~~~~16 bytes~~~~~~~~~~~~~~~~