shadows working, although a bit jumpy

game/resources/worlds.json

@@ -177,7 +177,11 @@
    },{
     "trileName": "test",
     "positions": [
-     0,0,-1,1,0,0,2,1,-3,0,2,1,-3,0,-1,1,-3,1,2,1,0,1,2,1,-3,1,-1,1
+     -3,1,-1,1,0,0,2,1,-3,0,2,1,-3,0,-1,1,-3,1,2,1,0,1,2,1,0,0,-1,1
+    ]
+   },{
+    "trileName": "plat",
+    "positions": [
     ]
    }
   ],

src/editor/textureDebugger.jai

@@ -7,17 +7,13 @@ theme_ptr         : GR.Overall_Theme;
 
 current_pipeline : s32 = 0;
 current_slot     : s32 = 0;
-pipeline_names   : []string = .["arbtri", "trixel", "sky", "trile", "plane"];
+pipeline_names   : []string = .["shadowmap", "reflection", "main"];
-slot_names       : []string = .["Slot 1","Slot 2","Slot 3","Slot 4","Slot 5","Slot 6","Slot 7","Slot 8"];
 
 draw_subwindow_texture_debug :: (state: *GR.Subwindow_State, r: GR.Rect, data: *void) {
     r2 := r;
     r2.h = ui_h(5,0);
-    r2.w = r.w * 0.75;
+    r2.w = r.w;
     GR.dropdown(r2, pipeline_names, *current_pipeline, *theme_ptr.dropdown_theme);
-    r2.x += r2.w;
-    r2.w = r.w * 0.25;
-    GR.dropdown(r2, slot_names, *current_slot, *theme_ptr.dropdown_theme);
 
     r2.y = r.y + r2.h;
     r2.h = r.h - r2.h;
@@ -26,16 +22,14 @@ draw_subwindow_texture_debug :: (state: *GR.Subwindow_State, r: GR.Rect, data: *
 
     uiTex := New(Ui_Texture ,,temp);
 
-    bind : sg_bindings; 
+    image : sg_image; 
     if current_pipeline == {
-        case 0; bind = gPipelines.arbtri.bind;
+        case 0; image = g_shadowmap_img;
-        case 1; bind = gPipelines.trixel.bind;
+        case 1; image = gPipelines.plane.bind.images[0];
-        case 2; bind = gPipelines.sky.bind;
+        case 2; image = g_rendertex;
-        case 3; bind = gPipelines.trile.bind;
-        case 4; bind = gPipelines.plane.bind;
     }
     
-    uiTex.tex = bind.images[current_slot]; 
+    uiTex.tex = image; 
     
     if uiTex.tex.id != INVALID_ID {
     	set_shader_for_images(uiTex);

src/rendering/backend_sokol.jai

@@ -7,6 +7,7 @@ current_trile_offset_index : s32 = 0;
 
 current_world_config : *World_Config = null;
 in_shadowmap_pass    : bool = false;
+shadow_mvp           : Matrix4;
 
 backend_handle_command :: (cmd: *Render_Command) {
     if cmd.type == {
@@ -101,6 +102,7 @@ backend_draw_trile_positions :: (trile : string, amount : s32, worldConf: *World
         mvp = create_viewproj(*camera);
     } else {
         mvp = create_shadow_viewproj(*camera, worldConf);
+        shadow_mvp = mvp;
     }
 	vs_params : Trile_Vs_Params;
 	vs_params.mvp = mvp.floats;
@@ -147,8 +149,6 @@ backend_draw_sky :: (wc: *World_Config) {
 
 backend_draw_ground :: (wc: *World_Config) {
     mvp := create_viewproj(*camera);
-    mvp_shadow : Matrix4;
-    if current_world_config != null then mvp_shadow = create_shadow_viewproj(*camera, current_world_config);
     vs_params : Plane_Vs_Params;
     world_conf : Plane_World_Config;
     plane_data : Plane_Data;
@@ -158,7 +158,7 @@ backend_draw_ground :: (wc: *World_Config) {
 
     world_config_to_shader_type(wc, *world_conf);
 
-    vs_params.mvp_shadow = mvp_shadow.floats;
+    vs_params.mvp_shadow = shadow_mvp.floats;
     vs_params.mvp = mvp.floats;
     sg_apply_pipeline(gPipelines.plane.pipeline);
     gPipelines.plane.bind.samplers[2] = g_shadowmap_sampler;

src/rendering/pipelines.jai

@@ -461,8 +461,8 @@ create_plane_pipeline :: () {
     g_shadowmap_sampler = sg_make_sampler(*(sg_sampler_desc.{
         wrap_u = .CLAMP_TO_EDGE,
         wrap_v = .CLAMP_TO_EDGE,
-        min_filter = .LINEAR,
+        min_filter = .NEAREST,
-        mag_filter = .LINEAR,
+        mag_filter = .NEAREST,
         compare    = .LESS,
     }));
     

src/rendering/sky.jai

@@ -16,6 +16,22 @@ draw_sky :: (cam: *Camera, worldConfig: *World_Config = null) {
     sg_draw(0, 36, 1);
 }
 
+get_frustum_corners :: (cam: *Camera) -> [8]Vector3 {
+    mat_view := create_lookat(cam);
+    mat_proj := create_perspective(cam);
+
+    corners : [8]Vector3;
+    corners[0] = unproject(Vector3.{-1, -1, -1}, mat_proj, mat_view);
+    corners[1] = unproject(Vector3.{1, -1, -1}, mat_proj, mat_view);
+    corners[2] = unproject(Vector3.{1, 1, -1}, mat_proj, mat_view);
+    corners[3] = unproject(Vector3.{-1, 1, -1}, mat_proj, mat_view);
+    corners[4] = unproject(Vector3.{-1, -1, 1}, mat_proj, mat_view);
+    corners[5] = unproject(Vector3.{1, -1, 1}, mat_proj, mat_view);
+    corners[6] = unproject(Vector3.{1, 1, 1}, mat_proj, mat_view);
+    corners[7] = unproject(Vector3.{-1, 1, 1}, mat_proj, mat_view);
+    return corners;
+}
+
 create_shadow_viewproj :: (cam: *Camera, conf: *World_Config) -> Matrix4 {
 	up: Vector3 = .{0, 1, 0};
 	targetToPos := conf.sunPosition;
@@ -23,7 +39,18 @@ create_shadow_viewproj :: (cam: *Camera, conf: *World_Config) -> Matrix4 {
 	B := normalize(cross(up, A));
 	C := cross(A, B);
     
-    sunCameraPosition := cam.target + 20*A;
+	camcpy := cam.*;
+	camcpy.far = 50;
+	camcpy.near = 0.5;
+	
+    frustum_corners := get_frustum_corners(*camcpy);
+
+	avg : Vector3;
+	for frustum_corners {
+		avg += it;
+	}
+	avg /= 8.0;
+    sunCameraPosition := avg + 30*A;
 
 	view := Matrix4.{
 		B.x, C.x, A.x, 0,
@@ -32,7 +59,37 @@ create_shadow_viewproj :: (cam: *Camera, conf: *World_Config) -> Matrix4 {
 		-dot(B, sunCameraPosition), -dot(C, sunCameraPosition), -dot(A, sunCameraPosition), 1
 	};
 
-    top := 10.0; right := 10.0;
+    min_v := Vector3.{ 9999,  9999,  9999};
-    proj := orthographic_projection_matrix(-right, right, -top, top, 5, 100, true);
+    max_v := Vector3.{-9999, -9999, -9999};
-    return view * proj;
+
+    for corner: frustum_corners {
+        transformed_corner := (view * Vector4.{corner.x, corner.y, corner.z, 1.0}).xyz;
+        min_v.x = min(min_v.x, transformed_corner.x);
+        min_v.y = min(min_v.y, transformed_corner.y);
+        min_v.z = min(min_v.z, transformed_corner.z);
+        max_v.x = max(max_v.x, transformed_corner.x);
+        max_v.y = max(max_v.y, transformed_corner.y);
+        max_v.z = max(max_v.z, transformed_corner.z);
+    }
+
+	max_v *= 2;
+	min_v *= 2;
+
+    proj := matrix_ortho(min_v.x, max_v.x, min_v.y, max_v.y, -max_v.z-100, -min_v.z);
+    return view*proj;
+}
+
+// taken from raymath.h
+matrix_ortho :: (left: float, right: float, bottom: float, top: float, near: float, far: float) -> Matrix4 {
+	rl := right - left;
+	tb := top - bottom;
+	fn := far - near;
+
+	return Matrix4.{
+		2.0/rl,0,0,0,
+		0,2.0/tb,0,0,
+		0,0,-2/fn,0,
+		-(left + right)/rl, -(top+bottom)/tb, (far+near)/fn, 1
+	};
+	
 }

src/shaders/jai/shader_plane.jai

@@ -104,9 +104,10 @@ Plane_World_Config :: struct {
 
     void main()
     {
-        vec4 _37 = vec4(position.xyz * 1000.0, 1.0);
+        vec3 _16 = position.xyz * 1000.0;
+        vec4 _37 = vec4(_16, 1.0);
         gl_Position = mat4(plane_vs_params[0], plane_vs_params[1], plane_vs_params[2], plane_vs_params[3]) * _37;
-        light_proj_pos = mat4(plane_vs_params[4], plane_vs_params[5], plane_vs_params[6], plane_vs_params[7]) * _37;
+        light_proj_pos = mat4(plane_vs_params[4], plane_vs_params[5], plane_vs_params[6], plane_vs_params[7]) * vec4(round(_16 * 16.0) * vec3(0.0625), 1.0);
         pos = _37;
         idx = gl_InstanceID;
     }
@@ -127,26 +128,30 @@ vs_plane_source_glsl430 := u8.[
     0x63,0x61,0x74,0x69,0x6f,0x6e,0x20,0x3d,0x20,0x31,0x29,0x20,0x66,0x6c,0x61,0x74,
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+    0x20,0x76,0x65,0x63,0x33,0x20,0x5f,0x31,0x36,0x20,0x3d,0x20,0x70,0x6f,0x73,0x69,
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+    0x0a,0x7d,0x0a,0x0a,0x00,
 ];
 /*
     #version 430
@@ -499,9 +504,10 @@ fs_plane_source_glsl430 := u8.[
 
     void main()
     {
-        vec4 _37 = vec4(position.xyz * 1000.0, 1.0);
+        vec3 _16 = position.xyz * 1000.0;
+        vec4 _37 = vec4(_16, 1.0);
         gl_Position = mat4(plane_vs_params[0], plane_vs_params[1], plane_vs_params[2], plane_vs_params[3]) * _37;
-        light_proj_pos = mat4(plane_vs_params[4], plane_vs_params[5], plane_vs_params[6], plane_vs_params[7]) * _37;
+        light_proj_pos = mat4(plane_vs_params[4], plane_vs_params[5], plane_vs_params[6], plane_vs_params[7]) * vec4(round(_16 * 16.0) * vec3(0.0625), 1.0);
         pos = _37;
         idx = gl_InstanceID;
     }
@@ -518,26 +524,30 @@ vs_plane_source_glsl300es := u8.[
     0x3b,0x0a,0x6f,0x75,0x74,0x20,0x76,0x65,0x63,0x34,0x20,0x70,0x6f,0x73,0x3b,0x0a,
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 ];
 /*
     #version 300 es
@@ -924,9 +934,10 @@ fs_plane_source_glsl300es := u8.[
     vertex main0_out main0(main0_in in [[stage_in]], constant plane_vs_params& _28 [[buffer(0)]], uint gl_InstanceIndex [[instance_id]])
     {
         main0_out out = {};
-        float4 _37 = float4(in.position.xyz * 1000.0, 1.0);
+        float3 _16 = in.position.xyz * 1000.0;
+        float4 _37 = float4(_16, 1.0);
         out.gl_Position = _28.mvp * _37;
-        out.light_proj_pos = _28.mvp_shadow * _37;
+        out.light_proj_pos = _28.mvp_shadow * float4(round(_16 * 16.0) * float3(0.0625), 1.0);
         out.pos = _37;
         out.idx = int(gl_InstanceIndex);
         return out;
@@ -967,20 +978,24 @@ vs_plane_source_metal_macos := u8.[
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 ];
 /*
     #pragma clang diagnostic ignored "-Wmissing-prototypes"

src/shaders/shader_plane.glsl

@@ -15,7 +15,8 @@ out vec4 light_proj_pos;
 void main() {
     vec3 multisize = vec3(position.xyz * 1000.0);
     gl_Position = mvp * vec4(multisize, 1.0);
-    light_proj_pos = mvp_shadow * vec4(multisize, 1.0);
+    vec3 texelMultisize = round(multisize* 16.0) / 16.0;
+    light_proj_pos = mvp_shadow * vec4(texelMultisize, 1.0);
     // #if !SOKOL_GLSL
     //     light_proj_pos.y = -light_proj_pos.y;
     // #endif