palette postprocess

.helix/config.toml

@@ -0,0 +1,3 @@
+[keys.normal." "."o"] # test2
+r = ":run-shell-command odin run ."
+d = ":run-shell-command odin run . -debug"

assets/shaders/fshader.glsl

@@ -17,6 +17,9 @@ out vec4 finalColor;
 
 struct Light {
     int enabled;
+    float distanceNear;
+    float distanceFar;
+    float power;
     vec3 position;
     vec4 color;
 };
@@ -35,26 +38,23 @@ void main()
         vec3 lightDot = vec3(0.0);
         vec4 tint = colDiffuse * fragColor;
         vec3 normal = normalize(fragNormal);
-        float lightpower = 0.0;
         
-        // finalColor.rgb = vec3(0.0);
         for (int i = 0; i < MAX_LIGHTS; i++) {
             if (lights[i].enabled == 1) {
-                // finalColor.r += 0.05;
                 vec3 light = vec3(0.0);
 
                 light = normalize(lights[i].position - fragPosition);
 
                 float dist = distance(lights[i].position, fragPosition);
                 
-                float near = smoothstep(5.0, 2.0, dist);
-                float far = smoothstep(30.0, 1.0, dist) / 3.0;
-                float power = near + far * far * far;
-                lightpower += power;
+                float power = smoothstep(lights[i].distanceFar, lights[i].distanceNear, dist);
+                // float far = smoothstep(30.0, 1.0, dist) / 3.0;
+                // float power = near + far * far * far;
+                power = power * power;
                 float NdotL = max(dot(normal, light), 0.0);
                 // lightDot += lights[i].color.rgb * light * NdotL;
                 // lightDot += lights[i].color.rgb * power * NdotL;
-                lightDot += lights[i].color.rgb * power;
+                lightDot += lights[i].color.rgb * power * lights[i].power;
          
             }
         }   

assets/shaders/postprocess.glsl

@@ -0,0 +1,30 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec3 fragPosition;
+in vec2 fragTexCoord;
+in vec4 fragColor;
+in vec3 fragNormal;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform sampler2D texture1;
+uniform vec4 colDiffuse;
+
+#define POSTERIZE 5.0
+
+out vec4 finalColor;
+
+void main() {
+    vec4 texelColor = texture(texture0, fragTexCoord);
+    float grey = 0.21 * texelColor.r + 0.71 * texelColor.g + 0.07 * texelColor.b ;
+    vec2 paluv = vec2(grey, 0.5);
+    vec4 paletteValue = texture(texture1, paluv);
+
+    finalColor.a = 1.0;
+    // finalColor.rgb = floor(texelColor.rgb * POSTERIZE) / POSTERIZE;
+
+    finalColor.rgb = paletteValue.rgb;
+    //
+    // finalColor.rgb = vec3(mean) + paletteValue.rgb;
+}

main.odin

@@ -16,12 +16,18 @@ Buddy :: struct {
 
 
 Light :: struct {
-	enabled:     i32,
-	position:    [3]f32,
-	color:       [4]f32,
-	enabledLoc:  i32,
-	positionLoc: i32,
-	colorLoc:    i32,
+	enabled:         i32,
+	distanceNear:    f32,
+	distanceFar:     f32,
+	power:           f32,
+	position:        [3]f32,
+	color:           [4]f32,
+	enabledLoc:      i32,
+	distanceNearLoc: i32,
+	distanceFarLoc:  i32,
+	powerLoc:        i32,
+	positionLoc:     i32,
+	colorLoc:        i32,
 }
 
 MAX_LIGHTS :: 12
@@ -29,6 +35,7 @@ MAX_LIGHTS :: 12
 lights := [MAX_LIGHTS]Light{}
 
 main :: proc() {
+	rl.SetConfigFlags({.WINDOW_RESIZABLE, .MSAA_4X_HINT})
 	rl.InitWindow(900, 600, "flash")
 
 	checker := rl.GenImageChecked(128, 128, 32, 32, {128, 128, 128, 255}, {150, 150, 150, 255})
@@ -41,10 +48,14 @@ main :: proc() {
 	rl.GenMeshTangents(&checkplane)
 
 	w, h := rl.GetScreenWidth(), rl.GetScreenHeight()
-	target := rl.LoadRenderTexture(w / 2, h / 2)
+	pixelize: i32 = 2
+	target := rl.LoadRenderTexture(w / pixelize, h / pixelize)
+
+	palette := rl.LoadTexture("assets/gfx/blood-crow-1x.png")
+	rl.SetTextureFilter(palette, .POINT)
 
 
-	texture := rl.LoadTexture("./playerBlue_walk4.png")
+	texture := rl.LoadTexture("assets/gfx/buddy.png")
 	defer rl.UnloadTexture(texture)
 
 
@@ -61,6 +72,7 @@ main :: proc() {
 
 	shader := rl.LoadShaderFromMemory(vshader, fshader)
 	posterizer := rl.LoadShaderFromMemory(nil, postprocess)
+	poster_palette := rl.GetShaderLocation(posterizer, "texture1")
 	checkmtl.shader = shader
 
 	for &light, i in lights {
@@ -73,11 +85,27 @@ main :: proc() {
 			f32(color.a) / 255,
 		}
 		light.position = {rand.float32_range(-20, 20), 3, rand.float32_range(-20, 20)}
+		light.power = rand.float32_range(0.9, 1.5)
+		light.distanceFar = rand.float32_range(7, 11)
 
 		light.enabledLoc = rl.GetShaderLocation(shader, rl.TextFormat("lights[%i].enabled", i))
+		light.distanceNearLoc = rl.GetShaderLocation(
+			shader,
+			rl.TextFormat("lights[%i].distanceNear", i),
+		)
+		light.distanceFarLoc = rl.GetShaderLocation(
+			shader,
+			rl.TextFormat("lights[%i].distanceFar", i),
+		)
+		light.powerLoc = rl.GetShaderLocation(shader, rl.TextFormat("lights[%i].power", i))
 		light.positionLoc = rl.GetShaderLocation(shader, rl.TextFormat("lights[%i].position", i))
 		light.colorLoc = rl.GetShaderLocation(shader, rl.TextFormat("lights[%i].color", i))
 
+		rl.SetShaderValue(shader, light.enabledLoc, &(light.enabled), .INT)
+		rl.SetShaderValue(shader, light.distanceNearLoc, &(light.distanceNear), .FLOAT)
+		rl.SetShaderValue(shader, light.distanceFarLoc, &(light.distanceFar), .FLOAT)
+		rl.SetShaderValue(shader, light.powerLoc, &(light.power), .FLOAT)
+		rl.SetShaderValue(shader, light.enabledLoc, &(light.enabled), .INT)
 		rl.SetShaderValue(shader, light.enabledLoc, &(light.enabled), .INT)
 		rl.SetShaderValue(shader, light.positionLoc, &(light.position), .VEC3)
 		rl.SetShaderValue(shader, light.colorLoc, &(light.color), .VEC4)
@@ -98,6 +126,11 @@ main :: proc() {
 	rotation: f32 = 0.0
 
 	for !rl.WindowShouldClose() {
+		if rl.IsWindowResized() {
+			w, h = rl.GetScreenWidth(), rl.GetScreenHeight()
+			rl.UnloadRenderTexture(target)
+			target = rl.LoadRenderTexture(w / pixelize, h / pixelize)
+		}
 		delta := rl.GetFrameTime()
 		rotation += delta
 		rl.BeginTextureMode(target)
@@ -144,22 +177,24 @@ main :: proc() {
 		rl.EndMode3D()
 		rl.EndTextureMode()
 		rl.BeginDrawing()
-		// rl.BeginShaderMode(posterizer)
+		rl.BeginShaderMode(posterizer)
+		rl.SetShaderValueTexture(posterizer, poster_palette, palette)
 		rl.DrawTexturePro(
 			target.texture,
-			rl.Rectangle{0, f32(h / 2), f32(w / 2), -f32(h / 2)},
+			rl.Rectangle{0, f32(h / pixelize), f32(w / pixelize), -f32(h / pixelize)},
 			{0, 0, f32(w), f32(h)},
 			{},
 			0,
 			rl.WHITE,
 		)
-		// rl.EndShaderMode()
+		rl.EndShaderMode()
+		rl.DrawTexture(palette, 0, 0, rl.WHITE)
 		rl.EndDrawing()
 	}
 }
 
 
-vshader: cstring = #load("./vshader.glsl", cstring)
-fshader: cstring = #load("./fshader.glsl", cstring)
-postprocess: cstring = #load("./postprocess.glsl", cstring)
+vshader: cstring = #load("assets/shaders/vshader.glsl", cstring)
+fshader: cstring = #load("assets/shaders/fshader.glsl", cstring)
+postprocess: cstring = #load("assets/shaders/postprocess.glsl", cstring)
 

postprocess.glsl

@@ -1,22 +0,0 @@
-#version 330
-
-// Input vertex attributes (from vertex shader)
-in vec3 fragPosition;
-in vec2 fragTexCoord;
-in vec4 fragColor;
-in vec3 fragNormal;
-
-// Input uniform values
-uniform sampler2D texture0;
-uniform vec4 colDiffuse;
-
-#define POSTERIZE 5.0
-
-out vec4 finalColor;
-
-void main() {
-    vec4 texelColor = texture(texture0, fragTexCoord);
-
-    finalColor.a = 1.0;
-    finalColor.rgb = floor(texelColor.rgb * POSTERIZE) / POSTERIZE;
-}