X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=fishladder_resources.h;h=2bd1442d125e379b53eb589b77fc3f0b81ba8390;hb=edd5498fac470c6a98e45ab326c2bf2e2a552664;hp=147f9aa748a32feba973175d54866f104e4f85b9;hpb=72e9a469a490e537f2e12464c1b075eb8991a868;p=fishladder.git

diff --git a/fishladder_resources.h b/fishladder_resources.h
index 147f9aa..2bd1442 100644
--- a/fishladder_resources.h
+++ b/fishladder_resources.h
@@ -292,12 +292,65 @@ SHADER_DEFINE( shader_background,
 	UNIFORMS({ "uPv", "uOffset", "uTexMain", "uVariance", "uSamplerNoise" })
 )
 
+SHADER_DEFINE( shader_wire,
+	// VERTEX
+	"layout (location=0) in vec2 a_co;"
+	"uniform vec3 uStart;"
+	"uniform vec3 uEnd;"
+	"uniform mat3 uPv;"
+	"uniform float uCurve;"
+	""
+	"out vec2 aTexCoords;"
+	""
+	"vec3 sample_curve_time( float t )"
+	"{"
+		"vec3 line_coord = mix( uStart, uEnd, t );"
+
+		"float curve_amt = 1.0-(pow((t*2.0-1.0),2.0));"
+		"return vec3( line_coord.x, line_coord.y - curve_amt*uCurve, line_coord.z );"
+	"}"
+	""
+	"void main()"
+	"{"
+		// Vertex transform
+		"vec3 p0 = sample_curve_time( a_co.x );"
+		"vec3 p1 = sample_curve_time( a_co.x + 0.025 );"
+		
+		"vec2 line_tangent = normalize(p1.xy-p0.xy);"
+		"vec2 line_normal = vec2( -line_tangent.y, line_tangent.x );"
+		
+		"vec2 worldfinal = p0.xy + line_normal*a_co.y*p0.z;"
+		
+		"gl_Position = vec4( uPv * vec3(worldfinal, 1.0), 1.0 );"
+
+		// Create texture coords (todo: include stretch adjusted coords?)
+		"aTexCoords = vec2( a_co.x, a_co.y + 0.5 );"
+	"}",
+	
+	// FRAGMENT
+	"out vec4 FragColor;"
+	""
+	"uniform sampler2D uTexMain;"
+	"uniform vec4 uColour;"
+	""
+	"in vec2 aTexCoords;"
+	""
+	"void main()"
+	"{"
+		"FragColor = uColour;"
+	"}"
+	,
+	UNIFORMS({ "uPv", "uColour", "uTexMain", "uStart", "uEnd", "uCurve" })
+)
+
+
 void vg_register(void)
 {
 	SHADER_INIT( shader_tile_colour );
 	SHADER_INIT( shader_tile_main );
 	SHADER_INIT( shader_ball );
 	SHADER_INIT( shader_background );
+	SHADER_INIT( shader_wire );
 }
 
 /*