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(#55) Make the flashlight effect togglable

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This commit is contained in:
rexim 2019-11-21 00:03:28 +07:00
parent 467c23b771
commit 68b0f54414
2 changed files with 9 additions and 4 deletions
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9
src/boomer.nim
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@ -78,7 +78,7 @@ proc newShaderProgram(vertex, fragment: Shader): GLuint =
glUseProgram(result)
proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
windowSize: Vec2f, mouse: Mouse) =
windowSize: Vec2f, mouse: Mouse, flShadow: float32) =
glClearColor(0.1, 0.1, 0.1, 1.0)
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
@ -95,6 +95,7 @@ proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
glUniform2f(glGetUniformLocation(shader, "cursorPos".cstring),
mouse.curr.x.float32,
mouse.curr.y.float32)
glUniform1f(glGetUniformLocation(shader, "flShadow".cstring), flShadow)
glBindVertexArray(vao)
glDrawElements(GL_TRIANGLES, count = 6, GL_UNSIGNED_INT, indices = nil)
@ -268,6 +269,7 @@ proc main() =
quitting = false
camera = Camera(scale: 1.0)
mouse: Mouse
flashlight = false
while not quitting:
var wa: TXWindowAttributes
@ -320,6 +322,9 @@ proc main() =
shaderProgram = newShaderProgram(vertexShader, fragmentShader)
echo "Shader program ID: ", shaderProgram
echo "------------------------------"
of XK_f:
flashlight = not flashlight
else:
discard
@ -351,7 +356,7 @@ proc main() =
screenshot.draw(camera, shaderProgram, vao, texture,
vec2(wa.width.float32, wa.height.float32),
mouse)
mouse, if flashlight: 0.8 else: 0.0)
glXSwapBuffers(display, win)

4
src/frag.glsl
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@ -4,16 +4,16 @@ in mediump vec2 texcoord;
uniform sampler2D tex;
uniform vec2 cursorPos;
uniform vec2 windowSize;
uniform float flShadow;
const float FLASHLIGHT_RADIUS = 200.0;
void main()
{
vec4 cursor = vec4(cursorPos.x, windowSize.y - cursorPos.y, 0.0, 1.0);
float f = 0.8;
if (length(cursor - gl_FragCoord) < FLASHLIGHT_RADIUS) {
color = texture(tex, texcoord);
} else {
color = texture(tex, texcoord) - vec4(f, f, f, 0.0);
color = texture(tex, texcoord) - vec4(flShadow, flShadow, flShadow, 0.0);
}
}