init, disco

.gitignore

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+flashtest
+

fshader.glsl

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+#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;
+
+// Output fragment color
+out vec4 finalColor;
+
+#define MAX_LIGHTS 12
+
+struct Light {
+    int enabled;
+    vec3 position;
+    vec4 color;
+};
+
+uniform Light lights[MAX_LIGHTS];
+uniform vec4 ambient;
+
+
+void main()
+{
+    vec4 texelColor = texture(texture0, fragTexCoord);
+    if (texelColor.a == 0.0) discard;
+    if (fragColor.b < 1.0) {
+    	finalColor = vec4(1.0, 1.0, 1.0, 1.0);
+    } else {
+        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 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;
+         
+            }
+        }   
+        finalColor.rgb = (texelColor.rgb * lightDot);
+        // finalColor.rgb = normal;
+        // finalColor = (texelColor * vec4(lightDot, 1.0));
+        // finalColor = pow(finalColor, vec4(1.0/2.2));
+        // finalColor.rgb = fragPosition;
+    }
+}

main.odin

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+package main
+
+
+import "core:log"
+import "core:math"
+import "core:math/linalg"
+import "core:math/rand"
+import rl "vendor:raylib"
+
+
+Buddy :: struct {
+	pos:       [3]f32,
+	gothit:    bool,
+	hit_timer: f32,
+}
+
+
+Light :: struct {
+	enabled:     i32,
+	position:    [3]f32,
+	color:       [4]f32,
+	enabledLoc:  i32,
+	positionLoc: i32,
+	colorLoc:    i32,
+}
+
+MAX_LIGHTS :: 12
+
+lights := [MAX_LIGHTS]Light{}
+
+main :: proc() {
+	rl.InitWindow(900, 600, "flash")
+
+	checker := rl.GenImageChecked(128, 128, 32, 32, {128, 128, 128, 255}, {150, 150, 150, 255})
+	defer rl.UnloadImage(checker)
+	checktex := rl.LoadTextureFromImage(checker)
+	defer rl.UnloadTexture(checktex)
+	checkmtl := rl.LoadMaterialDefault()
+	rl.SetMaterialTexture(&checkmtl, .ALBEDO, checktex)
+	checkplane := rl.GenMeshPlane(30, 30, 1, 1)
+	rl.GenMeshTangents(&checkplane)
+
+	w, h := rl.GetScreenWidth(), rl.GetScreenHeight()
+	target := rl.LoadRenderTexture(w / 2, h / 2)
+
+
+	texture := rl.LoadTexture("./playerBlue_walk4.png")
+	defer rl.UnloadTexture(texture)
+
+
+	buddies := [dynamic]Buddy{}
+	defer delete(buddies)
+	for i := 0; i < 1000; i += 1 {
+		buddy := Buddy {
+			pos       = {rand.float32_range(-10, 10), 1, rand.float32_range(-10, 10)},
+			gothit    = false,
+			hit_timer = rand.float32_range(1, 15),
+		}
+		append(&buddies, buddy)
+	}
+
+	shader := rl.LoadShaderFromMemory(vshader, fshader)
+	posterizer := rl.LoadShaderFromMemory(nil, postprocess)
+	checkmtl.shader = shader
+
+	for &light, i in lights {
+		light.enabled = 1
+		color := rl.ColorFromHSV(f32(i) / f32(MAX_LIGHTS) * 360, 1, 1)
+		light.color = [4]f32 {
+			f32(color.r) / 255,
+			f32(color.g) / 255,
+			f32(color.b) / 255,
+			f32(color.a) / 255,
+		}
+		light.position = {rand.float32_range(-20, 20), 3, rand.float32_range(-20, 20)}
+
+		light.enabledLoc = rl.GetShaderLocation(shader, rl.TextFormat("lights[%i].enabled", 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.positionLoc, &(light.position), .VEC3)
+		rl.SetShaderValue(shader, light.colorLoc, &(light.color), .VEC4)
+
+	}
+
+
+	cam := rl.Camera3D {
+		position   = {20, 20, 20},
+		target     = {0, 0, 0},
+		up         = {0, 1, 0},
+		fovy       = 25,
+		projection = .PERSPECTIVE,
+	}
+
+
+	log.info("Buddies: ", len(buddies))
+	rotation: f32 = 0.0
+
+	for !rl.WindowShouldClose() {
+		delta := rl.GetFrameTime()
+		rotation += delta
+		rl.BeginTextureMode(target)
+		rl.ClearBackground(rl.BLACK)
+		rl.BeginMode3D(cam)
+		// rl.DrawPlane({0, 0, 0}, {30, 30}, rl.WHITE)
+		for &light, i in lights {
+			color: [4]u8 = {
+				u8(light.color.r * 255),
+				u8(light.color.g * 255),
+				u8(light.color.b * 255),
+				u8(light.color.a * 255),
+			}
+			light.position.xz = [2]f32 {
+				math.cos_f32(rotation + (f32(i) / f32(MAX_LIGHTS)) * math.PI * 2) * 8,
+				math.sin_f32(rotation + (f32(i) / f32(MAX_LIGHTS)) * math.PI * 2) * 8,
+			}
+			rl.SetShaderValue(shader, light.positionLoc, &(light.position), .VEC3)
+			rl.DrawSphere(light.position, 1, transmute(rl.Color)color)
+		}
+		rl.BeginShaderMode(shader)
+		rl.DrawMesh(checkplane, checkmtl, rl.Matrix(1))
+		// rl.DrawPlane({}, 100, rl.GREEN)
+		for &buddy in buddies {
+			buddy.hit_timer -= delta
+			if buddy.hit_timer < 0.2 {
+				buddy.gothit = true
+				if buddy.hit_timer < 0 {
+					buddy.gothit = false
+					buddy.hit_timer = rand.float32_range(1, 5)
+				}
+			}
+			color := rl.WHITE
+			if buddy.gothit do color = rl.RED
+			rl.DrawBillboard(cam, texture, buddy.pos, 1, color)
+		}
+		// for &buddy in buddies {
+		// 	color := rl.WHITE
+		// 	if buddy.gothit do color = rl.RED
+		// 	rl.DrawCubeV(buddy.pos, {0.3, 0.5, 0.3}, color)
+		// }
+
+		rl.EndShaderMode()
+		rl.EndMode3D()
+		rl.EndTextureMode()
+		rl.BeginDrawing()
+		// rl.BeginShaderMode(posterizer)
+		rl.DrawTexturePro(
+			target.texture,
+			rl.Rectangle{0, f32(h / 2), f32(w / 2), -f32(h / 2)},
+			{0, 0, f32(w), f32(h)},
+			{},
+			0,
+			rl.WHITE,
+		)
+		// rl.EndShaderMode()
+		rl.EndDrawing()
+	}
+}
+
+
+vshader: cstring = #load("./vshader.glsl", cstring)
+fshader: cstring = #load("./fshader.glsl", cstring)
+postprocess: cstring = #load("./postprocess.glsl", cstring)
+

postprocess.glsl

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+#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;
+}

vshader.glsl

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+
+
+#version 330
+
+// Input vertex attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvp;
+uniform mat4 matModel;
+uniform mat4 matNormal;
+
+// Output vertex attributes (to fragment shader)
+out vec3 fragPosition;
+out vec2 fragTexCoord;
+out vec4 fragColor;
+out vec3 fragNormal;
+
+// NOTE: Add your custom variables here
+
+void main()
+{
+    // Send vertex attributes to fragment shader
+    fragPosition = vec3(matModel*vec4(vertexPosition, 1.0));
+    // fragPosition = vertexPosition;
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    fragNormal = normalize(vec3(matNormal*vec4(vertexNormal, 1.0)));
+
+    // Calculate final vertex position
+    gl_Position = mvp*vec4(vertexPosition, 1.0);
+}