From 6f6073be5de8c8598c4af7f38c90c3f83b5bf1bf Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 18 Dec 2018 21:08:20 +0100
Subject: Hacky mouse-based fluid interaction

---
 src/shader/code/collide.glsl      | 10 +++++++++-
 src/shader/wrap/compute_shader.cc | 12 +++++++++---
 src/shader/wrap/compute_shader.h  |  3 ++-
 3 files changed, 20 insertions(+), 5 deletions(-)

(limited to 'src/shader')

diff --git a/src/shader/code/collide.glsl b/src/shader/code/collide.glsl
index 78d3936..2626c70 100644
--- a/src/shader/code/collide.glsl
+++ b/src/shader/code/collide.glsl
@@ -7,6 +7,10 @@ layout (std430, binding=1) buffer bufferCollide{ float collideCells[]; };
 layout (std430, binding=2) buffer bufferStream{  float streamCells[]; };
 layout (std430, binding=3) buffer bufferFluid{   float fluidCells[]; };
 
+uniform int mouseClicked;
+uniform int mouseX;
+uniform int mouseY;
+
 /// LBM constants
 
 uniform uint nX;
@@ -103,7 +107,11 @@ void main() {
 		return;
 	}
 
-	const float d = density(x,y);
+	float d = density(x,y);
+	if ( mouseClicked == 1 && abs(x - mouseX) < 3 && abs(y - mouseY) < 3 ) {
+		d = 1.5;
+	}
+
 	const vec2  v = velocity(x,y,d);
 
 	setFluid(x,y,v,d);
diff --git a/src/shader/wrap/compute_shader.cc b/src/shader/wrap/compute_shader.cc
index 54f50f8..134db2d 100644
--- a/src/shader/wrap/compute_shader.cc
+++ b/src/shader/wrap/compute_shader.cc
@@ -34,18 +34,24 @@ bool ComputeShader::isGood() const {
 	return _good;
 }
 
-GLuint ComputeShader::setUniform(const std::string& name, float x, float y) const {
+GLuint ComputeShader::setUniform(const std::string& name, int value) const {
 	GLuint id = util::getUniform(_id, name);
-	glUniform2f(id, x, y);
+	glUniform1i(id, value);
 	return id;
 }
 
-GLuint ComputeShader::setUniform(const std::string& name, unsigned int value) const {
+GLuint ComputeShader::setUniform(const std::string& name, GLuint value) const {
 	GLuint id = util::getUniform(_id, name);
 	glUniform1ui(id, value);
 	return id;
 }
 
+GLuint ComputeShader::setUniform(const std::string& name, float x, float y) const {
+	GLuint id = util::getUniform(_id, name);
+	glUniform2f(id, x, y);
+	return id;
+}
+
 void ComputeShader::workOn(const std::vector<GLuint>& buffers) const {
 	glBindBuffersBase(GL_SHADER_STORAGE_BUFFER, 1, buffers.size(), buffers.data());
 }
diff --git a/src/shader/wrap/compute_shader.h b/src/shader/wrap/compute_shader.h
index f2ab182..d7ef729 100644
--- a/src/shader/wrap/compute_shader.h
+++ b/src/shader/wrap/compute_shader.h
@@ -26,8 +26,9 @@ public:
 
 	bool isGood() const;
 
+	GLuint setUniform(const std::string& name, int value) const;
+	GLuint setUniform(const std::string& name, GLuint value) const;
 	GLuint setUniform(const std::string& name, float x, float y) const;
-	GLuint setUniform(const std::string& name, unsigned int value) const;
 
 	void workOn(const std::vector<GLuint>& buffers) const;
 
-- 
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