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@ -6,6 +6,7 @@ import config
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import x11/xlib, x11/x, x11/xutil, x11/keysym
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import opengl, opengl/glx
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import math
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import la
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type Shader = tuple[path, content: string]
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@ -75,8 +76,29 @@ proc newShaderProgram(vertex, fragment: Shader): GLuint =
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glUseProgram(result)
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proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
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windowSize: Vec2f, mouse: Mouse, flShadow: float32, flRadius: float32) =
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type Flashlight = object
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isEnabled: bool
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shadow: float32
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radius: float32
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deltaRadius: float32
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const
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INITIAL_FL_DELTA_RADIUS = 100.0
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FL_DELTA_RADIUS_DECELERATION = 400.0
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proc update(flashlight: var Flashlight, dt: float32) =
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flashlight.radius = max(0.0, flashlight.radius + flashlight.deltaRadius * dt)
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if abs(flashlight.deltaRadius) > 0.5:
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flashlight.deltaRadius -= sgn(flashlight.deltaRadius).float32 * FL_DELTA_RADIUS_DECELERATION * dt
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if flashlight.isEnabled:
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flashlight.shadow = min(flashlight.shadow + 6.0 * dt, 0.8)
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else:
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flashlight.shadow = max(flashlight.shadow - 6.0 * dt, 0.0)
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proc draw(screenshot: Image, camera: Camera, shader, vao, texture: GLuint,
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windowSize: Vec2f, mouse: Mouse, flashlight: Flashlight) =
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glClearColor(0.1, 0.1, 0.1, 1.0)
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glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
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@ -93,8 +115,8 @@ proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
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glUniform2f(glGetUniformLocation(shader, "cursorPos".cstring),
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mouse.curr.x.float32,
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mouse.curr.y.float32)
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glUniform1f(glGetUniformLocation(shader, "flShadow".cstring), flShadow)
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glUniform1f(glGetUniformLocation(shader, "flRadius".cstring), flRadius)
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glUniform1f(glGetUniformLocation(shader, "flShadow".cstring), flashlight.shadow)
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glUniform1f(glGetUniformLocation(shader, "flRadius".cstring), flashlight.radius)
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glBindVertexArray(vao)
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glDrawElements(GL_TRIANGLES, count = 6, GL_UNSIGNED_INT, indices = nil)
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@ -255,9 +277,9 @@ proc main() =
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quitting = false
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camera = Camera(scale: 1.0)
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mouse: Mouse
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flashlight = false
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f = 0.0
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flRadius = 200.0
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flashlight = Flashlight(
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isEnabled: false,
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radius: 200.0)
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while not quitting:
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var wa: TXWindowAttributes
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@ -313,7 +335,7 @@ proc main() =
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echo "------------------------------"
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of XK_f:
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flashlight = not flashlight
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flashlight.isEnabled = not flashlight.isEnabled
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else:
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discard
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@ -323,16 +345,15 @@ proc main() =
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mouse.prev = mouse.curr
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mouse.drag = true
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of Button4:
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if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight:
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# TODO(#57): changing flashlight radius should be animated
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flRadius += 10.0
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of Button4: # Scroll up
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if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight.isEnabled:
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flashlight.deltaRadius += INITIAL_FL_DELTA_RADIUS
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else:
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camera.deltaScale += config.scrollSpeed
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of Button5:
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if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight:
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flRadius = max(flRadius - 10.0, 0.0)
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of Button5: # Scoll down
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if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight.isEnabled:
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flashlight.deltaRadius -= INITIAL_FL_DELTA_RADIUS
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else:
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camera.deltaScale -= config.scrollSpeed
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@ -351,15 +372,11 @@ proc main() =
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let dt = 1.0 / config.fps.float
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camera.update(config, dt, mouse, screenshot,
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vec2(wa.width.float32, wa.height.float32))
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if flashlight:
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f = min(f + 6.0 * dt, 0.8)
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else:
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f = max(f - 6.0 * dt, 0.0)
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flashlight.update(dt)
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screenshot.draw(camera, shaderProgram, vao, texture,
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vec2(wa.width.float32, wa.height.float32),
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mouse, f, flRadius)
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mouse, flashlight)
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glXSwapBuffers(display, win)
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